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[Git][ghc/ghc][wip/andreask/hadrian_race] Some fixes
by Andreas Klebinger (＠AndreasK) 05 Mar '26

05 Mar '26

Andreas Klebinger pushed to branch wip/andreask/hadrian_race at Glasgow Haskell Compiler / GHC Commits: b2e71591 by Andreas Klebinger at 2026-03-05T13:09:16+01:00 Some fixes - - - - - 2 changed files: - libraries/ghc-boot/GHC/Unit/Database.hs - utils/ghc-pkg/Main.hs Changes: ===================================== libraries/ghc-boot/GHC/Unit/Database.hs ===================================== @@ -336,11 +336,10 @@ withLockedPackageDb mode file = (lockPackageDbWith (lock_mode mode) file) unlockPackageDb where - bracket_for_mode = + bracket_for_mode = case mode of - DbOpenReadOnly -> bracket - DbOpenReadWrite -> bracketOnError - where + DbOpenReadOnly -> bracket + DbOpenReadWrite{} -> bracketOnError lock_mode :: DbOpenMode m t -> LockMode lock_mode DbOpenReadOnly = SharedLock lock_mode DbOpenReadWrite{} = ExclusiveLock @@ -405,6 +404,14 @@ data DbMode = DbReadOnly | DbReadWrite deriving Eq -- | 'DbOpenMode' holds a value of type @t@ but only in 'DbReadWrite' mode. So -- it is like 'Maybe' but with a type argument for the mode to enforce that the -- mode is used consistently. +-- +-- We use the argument to DbOpenReadWrite only when modifying the DB for two uses: +-- * Storing the Din two cases: +-- When modifying the DB however the lock is meant to outlive +-- intermittent read operations. Which is why for writes we typically store the lock in DbOpenMode. +-- and pass it along the call path. +-- +-- See Note [ghc-pkg database locking] and withLockedPackageDb data DbOpenMode (mode :: DbMode) t where DbOpenReadOnly :: DbOpenMode 'DbReadOnly t DbOpenReadWrite :: t -> DbOpenMode 'DbReadWrite t @@ -430,7 +437,7 @@ isDbOpenReadMode = \case -- readPackageDbForGhc :: FilePath -> IO [DbUnitInfo] readPackageDbForGhc file = do - hPutStrLn stderr $ "readPackageDbForGhc:" ++ show file + -- hPutStrLn stderr $ "readPackageDbForGhc:" ++ show file withLockedPackageDb DbOpenReadOnly file $ \_ -> do decodeFromFile file DbOpenReadOnly getDbForGhc >>= \case (pkgs, DbOpenReadOnly) -> return pkgs @@ -450,10 +457,7 @@ readPackageDbForGhc file = do -- -- The incoming mode carries the exclusive lock if we are in R/W mode. -- --- If we open the package db in read only mode, we get its contents. Otherwise --- we additionally receive a PackageDbLock that represents a lock on the --- database, so that we can safely update it later. --- +-- Returns the lock on the db as-is. readPackageDbForGhcPkg :: Binary pkgs => FilePath -> DbOpenMode mode PackageDbLock -> IO (pkgs, DbOpenMode mode PackageDbLock) readPackageDbForGhcPkg file mode = @@ -545,15 +549,9 @@ headerMagic = BS.Char8.pack "\0ghcpkg\0" -- which it returns unchanged. decodeFromFile :: FilePath -> DbOpenMode mode PackageDbLock -> Get pkgs -> IO (pkgs, DbOpenMode mode PackageDbLock) -decodeFromFile file mode decoder = case mode of - -- DB is locked with shared access already, we just do the read. - DbOpenReadOnly -> do - (, DbOpenReadOnly) <$> decodeFileContents - DbOpenReadWrite{} -> do - -- When we open the package db in read/write mode, we receive an exclusive lock - -- on the database via the mode and return it so we can keep it for the duration of the - -- update. - -- If an exception is raised the caller releases the lock. +decodeFromFile file mode decoder = + -- Return incoming lock together with the result. + -- See Note [ghc-pkg database locking] (, mode) <$> decodeFileContents where decodeFileContents = withBinaryFile file ReadMode $ \hnd -> ===================================== utils/ghc-pkg/Main.hs ===================================== @@ -885,8 +885,9 @@ database in both modes: - In read-only mode, we take a *shared* lock before reading and unlock afterwards. Locking is needed to avoid a concurrent invocation of ghc-pkg deleting files from the db before we manage to read them. This occasionally happened in #22870. - (Note that, historically, we used to only lock the package db during reads on - Windows, but the justification seemed insufficient given #22870. See also #16773.) + (Note that, historically, only windows used to lock the package db during reads, + but the justification seemed insufficient given #22870. So now we always lock + even for reads. See also #16773.) - In read-write mode, we take an **exclusive** lock on the package database. However, we don't automatically release the lock after the inner action completes @@ -970,20 +971,13 @@ readParseDatabase verbosity mb_user_conf mode use_cache path where confs = map (path </>) $ filter (".conf" `isSuffixOf`) fs - -- Read the package db, potentially locking the .cache file for r/w mode. + -- Read the package db, using the given lock ignore_cache :: PackageDbLock -> (FilePath -> IO ()) -> IO (PackageDB mode) ignore_cache lock checkTime = do - -- If we're opening for modification, we need to acquire a - -- lock even if we don't open the cache now, because we are - -- going to modify it later. - - -- mode' <- F.mapM (const $ GhcPkg.lockPackageDb cache) mode - let doFile f = do checkTime f parseSingletonPackageConf verbosity f pkgs <- mapM doFile confs - -- mkPackageDB pkgs mode' mkPackageDB pkgs (modeWithLock lock mode) -- We normally report cache errors for read-only commands, View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/b2e71591480edf95b3d48547c98c831… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/b2e71591480edf95b3d48547c98c831… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/sjakobi/regression-tests-2] Add regression test for #9445
by Simon Jakobi (＠sjakobi2) 05 Mar '26

05 Mar '26

Simon Jakobi pushed to branch wip/sjakobi/regression-tests-2 at Glasgow Haskell Compiler / GHC Commits: d86d3a4e by Simon Jakobi at 2026-03-05T12:31:54+01:00 Add regression test for #9445 Closes #9445. - - - - - 2 changed files: - + testsuite/tests/simplCore/should_compile/T9445.hs - testsuite/tests/simplCore/should_compile/all.T Changes: ===================================== testsuite/tests/simplCore/should_compile/T9445.hs ===================================== @@ -0,0 +1,13 @@ +module T9445 (Transform) where + +data Transform = Transform + { m00 :: !Float, m10 :: !Float, m20 :: !Float + , m01 :: !Float, m11 :: !Float, m21 :: !Float + , m02 :: !Float, m12 :: !Float, m22 :: !Float + } + +instance Num Transform where + abs (Transform a00 a01 a02 a03 a04 a05 a06 a07 a08) = + (Transform (abs a00) (abs a01) (abs a02) (abs a03) + (abs a04) (abs a05) (abs a06) (abs a07) (abs a08)) + ===================================== testsuite/tests/simplCore/should_compile/all.T ===================================== @@ -190,6 +190,7 @@ test('T9400', only_ways(['optasm']), compile, ['-O0 -ddump-simpl -dsuppress-uniq test('T9441a', [only_ways(['optasm']), check_errmsg(r'f1 = f2') ], compile, ['-ddump-simpl -dsuppress-ticks']) test('T9441b', [only_ways(['optasm']), check_errmsg(r'Rec {') ], compile, ['-ddump-simpl']) test('T9441c', [only_ways(['optasm']), check_errmsg(r'Rec {') ], compile, ['-ddump-simpl']) +test('T9445', only_ways(['optasm']), compile, ['-Wno-missing-methods']) test('T9583', only_ways(['optasm']), compile, ['']) test('T9565', only_ways(['optasm']), compile, ['']) test('T5821', only_ways(['optasm']), compile, ['']) View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/d86d3a4e962a2164f6bd5a781d3573b… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/d86d3a4e962a2164f6bd5a781d3573b… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/T26985] ghc-internal: move bits Weak of finalizer interface to base
by Teo Camarasu (＠teo) 05 Mar '26

05 Mar '26

Teo Camarasu pushed to branch wip/T26985 at Glasgow Haskell Compiler / GHC Commits: 10a90f40 by Teo Camarasu at 2026-03-05T10:46:56+00:00 ghc-internal: move bits Weak of finalizer interface to base We move parts of the Weak finalizer interface to `base` only the parts that the RTS needs to know about are kept in `ghc-internal`. This lets us then prune our imports somewhat and get rid of some SOURCE imports. Resolves #26985 - - - - - 9 changed files: - libraries/base/src/GHC/Weak.hs - libraries/base/src/GHC/Weak/Finalize.hs - − libraries/base/src/GHC/Weak/Finalizehs - libraries/base/src/System/Mem/Weak.hs - − libraries/ghc-internal/src/GHC/Internal/Conc/Sync.hs-boot - − libraries/ghc-internal/src/GHC/Internal/IO/Handle/Text.hs-boot - libraries/ghc-internal/src/GHC/Internal/TopHandler.hs - libraries/ghc-internal/src/GHC/Internal/Weak.hs - libraries/ghc-internal/src/GHC/Internal/Weak/Finalize.hs Changes: ===================================== libraries/base/src/GHC/Weak.hs ===================================== @@ -29,3 +29,5 @@ module GHC.Weak ) where import GHC.Internal.Weak +import GHC.Internal.Weak.Finalize +import GHC.Weak.Finalize ===================================== libraries/base/src/GHC/Weak/Finalize.hs ===================================== @@ -14,9 +14,14 @@ module GHC.Weak.Finalize import GHC.Internal.Weak.Finalize --- These imports can be removed once runFinalizerBatch is removed, --- as can MagicHash above. -import GHC.Internal.Base (Int, Array#, IO, State#, RealWorld) +import GHC.Internal.Base +import GHC.Internal.Exception +import GHC.Internal.IORef +import GHC.Internal.Conc.Sync (labelThreadByteArray#, myThreadId) +import GHC.Internal.IO (catchException, unsafePerformIO) +import GHC.Internal.IO.Handle.Types (Handle) +import GHC.Internal.IO.Handle.Text (hPutStrLn) +import GHC.Internal.Encoding.UTF8 (utf8EncodeByteArray#) {-# DEPRECATED runFinalizerBatch @@ -36,3 +41,20 @@ runFinalizerBatch :: Int -> Array# (State# RealWorld -> State# RealWorld) -> IO () runFinalizerBatch = GHC.Internal.Weak.Finalize.runFinalizerBatch + +-- | Set the global action called to report exceptions thrown by weak pointer +-- finalizers to the user. +-- +-- @since base-4.18.0.0 +setFinalizerExceptionHandler :: (SomeException -> IO ()) -> IO () +setFinalizerExceptionHandler = writeIORef finalizerExceptionHandler + +-- | An exception handler for 'Handle' finalization that prints the error to +-- the given 'Handle', but doesn't rethrow it. +-- +-- @since base-4.18.0.0 +printToHandleFinalizerExceptionHandler :: Handle -> SomeException -> IO () +printToHandleFinalizerExceptionHandler hdl se = + hPutStrLn hdl msg `catchException` (\(SomeException _) -> return ()) + where + msg = "Exception during weak pointer finalization (ignored): " ++ displayException se ++ "\n" ===================================== libraries/base/src/GHC/Weak/Finalizehs deleted ===================================== ===================================== libraries/base/src/System/Mem/Weak.hs ===================================== @@ -91,6 +91,7 @@ module System.Mem.Weak ( import Prelude import GHC.Internal.Weak +import GHC.Weak -- | A specialised version of 'mkWeak', where the key and the value are -- the same object: ===================================== libraries/ghc-internal/src/GHC/Internal/Conc/Sync.hs-boot deleted ===================================== @@ -1,70 +0,0 @@ -{-# LANGUAGE MagicHash, NoImplicitPrelude #-} -{-# OPTIONS_HADDOCK not-home #-} - ------------------------------------------------------------------------------ --- | --- Module : GHC.Internal.Conc.Sync [boot] --- Copyright : (c) The University of Glasgow, 1994-2002 --- License : see libraries/base/LICENSE --- --- Maintainer : ghc-devs(a)haskell.org --- Stability : internal --- Portability : non-portable (GHC extensions) --- --- Basic concurrency stuff. --- ------------------------------------------------------------------------------ - -module GHC.Internal.Conc.Sync - ( forkIO, - ThreadId(..), - myThreadId, - showThreadId, - ThreadStatus(..), - threadStatus, - sharedCAF, - labelThreadByteArray# - ) where - -import GHC.Internal.Base -import GHC.Internal.Ptr - -forkIO :: IO () -> IO ThreadId - -data ThreadId = ThreadId ThreadId# - -data BlockReason - = BlockedOnMVar - -- ^blocked on 'MVar' - {- possibly (see 'threadstatus' below): - | BlockedOnMVarRead - -- ^blocked on reading an empty 'MVar' - -} - | BlockedOnBlackHole - -- ^blocked on a computation in progress by another thread - | BlockedOnException - -- ^blocked in 'throwTo' - | BlockedOnSTM - -- ^blocked in 'retry' in an STM transaction - | BlockedOnForeignCall - -- ^currently in a foreign call - | BlockedOnOther - -- ^blocked on some other resource. Without @-threaded@, - -- I\/O and 'threadDelay' show up as 'BlockedOnOther', with @-threaded@ - -- they show up as 'BlockedOnMVar'. - -data ThreadStatus - = ThreadRunning - -- ^the thread is currently runnable or running - | ThreadFinished - -- ^the thread has finished - | ThreadBlocked BlockReason - -- ^the thread is blocked on some resource - | ThreadDied - -- ^the thread received an uncaught exception - -myThreadId :: IO ThreadId -showThreadId :: ThreadId -> String -threadStatus :: ThreadId -> IO ThreadStatus -sharedCAF :: a -> (Ptr a -> IO (Ptr a)) -> IO a -labelThreadByteArray# :: ThreadId -> ByteArray# -> IO () ===================================== libraries/ghc-internal/src/GHC/Internal/IO/Handle/Text.hs-boot deleted ===================================== @@ -1,8 +0,0 @@ -{-# LANGUAGE NoImplicitPrelude #-} - -module GHC.Internal.IO.Handle.Text ( hPutStrLn ) where - -import GHC.Internal.Base (String, IO) -import {-# SOURCE #-} GHC.Internal.IO.Handle.Types (Handle) - -hPutStrLn :: Handle -> String -> IO () ===================================== libraries/ghc-internal/src/GHC/Internal/TopHandler.hs ===================================== @@ -50,6 +50,8 @@ import GHC.Internal.IO.Handle import GHC.Internal.IO.StdHandles import GHC.Internal.IO.Exception import GHC.Internal.Weak +import GHC.Internal.Weak.Finalize +import GHC.Internal.IO.Handle.Types () #if defined(mingw32_HOST_OS) import GHC.Internal.ConsoleHandler as GHC.ConsoleHandler ===================================== libraries/ghc-internal/src/GHC/Internal/Weak.hs ===================================== @@ -24,19 +24,9 @@ module GHC.Internal.Weak ( mkWeak, deRefWeak, finalize, - - -- * Handling exceptions - -- | When an exception is thrown by a finalizer called by the - -- garbage collector, GHC calls a global handler which can be set with - -- 'setFinalizerExceptionHandler'. Note that any exceptions thrown by - -- this handler will be ignored. - setFinalizerExceptionHandler, - getFinalizerExceptionHandler, - printToHandleFinalizerExceptionHandler ) where import GHC.Internal.Base -import GHC.Internal.Weak.Finalize {-| A weak pointer object with a key and a value. The value has type @v@. ===================================== libraries/ghc-internal/src/GHC/Internal/Weak/Finalize.hs ===================================== @@ -4,26 +4,17 @@ {-# LANGUAGE Unsafe #-} module GHC.Internal.Weak.Finalize - ( -- * Handling exceptions - -- | When an exception is thrown by a finalizer called by the - -- garbage collector, GHC calls a global handler which can be set with - -- 'setFinalizerExceptionHandler'. Note that any exceptions thrown by - -- this handler will be ignored. - setFinalizerExceptionHandler - , getFinalizerExceptionHandler - , printToHandleFinalizerExceptionHandler - -- * Internal + ( getFinalizerExceptionHandler , runFinalizerBatch + , finalizerExceptionHandler ) where import GHC.Internal.Base -import GHC.Internal.Exception -import GHC.Internal.IORef -import {-# SOURCE #-} GHC.Internal.Conc.Sync (labelThreadByteArray#, myThreadId) -import GHC.Internal.IO (catchException, unsafePerformIO) -import {-# SOURCE #-} GHC.Internal.IO.Handle.Types (Handle) -import {-# SOURCE #-} GHC.Internal.IO.Handle.Text (hPutStrLn) -import GHC.Internal.Encoding.UTF8 (utf8EncodeByteArray#) +import GHC.Internal.Conc.Sync ( labelThreadByteArray#, myThreadId ) +import GHC.Internal.Encoding.UTF8 ( utf8EncodeByteArray# ) +import GHC.Internal.Exception ( SomeException(..) ) +import GHC.Internal.IO ( catchException, unsafePerformIO ) +import GHC.Internal.IORef ( IORef, newIORef, readIORef ) data ByteArray = ByteArray ByteArray# @@ -75,20 +66,3 @@ finalizerExceptionHandler = unsafePerformIO $ newIORef (const $ return ()) -- @since base-4.18.0.0 getFinalizerExceptionHandler :: IO (SomeException -> IO ()) getFinalizerExceptionHandler = readIORef finalizerExceptionHandler - --- | Set the global action called to report exceptions thrown by weak pointer --- finalizers to the user. --- --- @since base-4.18.0.0 -setFinalizerExceptionHandler :: (SomeException -> IO ()) -> IO () -setFinalizerExceptionHandler = writeIORef finalizerExceptionHandler - --- | An exception handler for 'Handle' finalization that prints the error to --- the given 'Handle', but doesn't rethrow it. --- --- @since base-4.18.0.0 -printToHandleFinalizerExceptionHandler :: Handle -> SomeException -> IO () -printToHandleFinalizerExceptionHandler hdl se = - hPutStrLn hdl msg `catchException` (\(SomeException _) -> return ()) - where - msg = "Exception during weak pointer finalization (ignored): " ++ displayException se ++ "\n" View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/10a90f40e62f32a60b2c7813f0f1566… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/10a90f40e62f32a60b2c7813f0f1566… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Deleted branch ghc-9.6-plinth
by Luite Stegeman (＠luite) 05 Mar '26

05 Mar '26

Luite Stegeman deleted branch ghc-9.6-plinth at Glasgow Haskell Compiler / GHC -- You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/andreask/bump_shake] 22 commits: Add optional `SrcLoc` to `StackAnnotation` class
by Andreas Klebinger (＠AndreasK) 05 Mar '26

05 Mar '26

Andreas Klebinger pushed to branch wip/andreask/bump_shake at Glasgow Haskell Compiler / GHC Commits: 4c40df3d by fendor at 2026-02-20T10:24:48-05:00 Add optional `SrcLoc` to `StackAnnotation` class `StackAnnotation`s give access to an optional `SrcLoc` field that user-added stack annotations can use to provide better backtraces in both error messages and when decoding the callstack. We update builtin stack annotations such as `StringAnnotation` and `ShowAnnotation` to also capture the `SrcLoc` of the current `CallStack` to improve backtraces by default (if stack annotations are used). This change is backwards compatible with GHC 9.14.1. - - - - - fd9aaa28 by Simon Hengel at 2026-02-20T10:25:33-05:00 docs: Fix grammar in explicit_namespaces.rst - - - - - 44354255 by Vo Minh Thu at 2026-02-20T18:53:06-05:00 GHCi: add a :version command. This looks like: ghci> :version GHCi, version 9.11.20240322 This closes #24576. Co-Author: Markus Läll <markus.l2ll(a)gmail.com> - - - - - eab3dbba by Andreas Klebinger at 2026-02-20T18:53:51-05:00 hadrian/build-cabal: Better respect and utilize -j * We now respect -j<n> for the cabal invocation to build hadrian rather than hardcoding -j * We use the --semaphore flag to ensure cabal/ghc build the hadrian executable in parallel using the -jsem mechanism. Saves 10-15s on fresh builds for me. Fixes #26876 - - - - - 17839248 by Teo Camarasu at 2026-02-24T08:36:03-05:00 ghc-internal: avoid depending on GHC.Internal.Control.Monad.Fix This module contains the definition of MonadFix, since we want an instance for IO, that instance requires a lot of machinery and we want to avoid an orphan instance, this will naturally be quite high up in the dependency graph. So we want to avoid other modules depending on it as far as possible. On Windows, the IO manager depends on the RTSFlags type, which transtively depends on MonadFix. We refactor things to avoid this dependency, which would have caused a regression. Resolves #26875 Metric Decrease: T12227 - - - - - fa88d09a by Wolfgang Jeltsch at 2026-02-24T08:36:47-05:00 Refine the imports of `System.IO.OS` Commit 68bd08055594b8cbf6148a72d108786deb6c12a1 replaced the `GHC.Internal.Data.Bool` import by a `GHC.Internal.Base` import. However, while the `GHC.Internal.Data.Bool` import was conditional and partial, the `GHC.Internal.Base` import is unconditional and total. As a result, the import list is not tuned to import only the necessary bits anymore, and furthermore GHC emits a lot of warnings about redundant imports. This commit makes the `GHC.Internal.Base` import conditional and partial in the same way that the `GHC.Internal.Data.Bool` import was. - - - - - c951fef1 by Cheng Shao at 2026-02-25T20:58:28+00:00 wasm: add /assets endpoint to serve user-specified assets This patch adds an `/assets` endpoint to the wasm dyld http server, so that users can also fetch assets from the same host with sensible default MIME types, without needing a separate http server for assets that also introduces CORS headaches: - A `-fghci-browser-assets-dir` driver flag is added to specify the assets root directory (defaults to `$PWD`) - The dyld http server fetches `mime-db` on demand and uses it as source of truth for mime types. Closes #26951. - - - - - dde22f97 by Sylvain Henry at 2026-02-26T13:14:03-05:00 Fix -fcheck-prim-bounds for non constant args (#26958) Previously we were only checking bounds for constant (literal) arguments! I've refactored the code to simplify the generation of out-of-line Cmm code for the primop composed of some inline code + some call to an external Cmm function. - - - - - bd3eba86 by Vladislav Zavialov at 2026-02-27T05:48:01-05:00 Check for negative type literals in the type checker (#26861) GHC disallows negative type literals (e.g., -1), as tested by T8306 and T8412. This check is currently performed in the renamer: rnHsTyLit tyLit@(HsNumTy x i) = do when (i < 0) $ addErr $ TcRnNegativeNumTypeLiteral tyLit However, this check can be bypassed using RequiredTypeArguments (see the new test case T26861). Prior to this patch, such programs caused the compiler to hang instead of reporting a proper error. This patch addresses the issue by adding an equivalent check in the type checker, namely in tcHsType. The diff is deliberately minimal to facilitate backporting. A more comprehensive rework of HsTyLit is planned for a separate commit. - - - - - faf14e0c by Vladislav Zavialov at 2026-02-27T05:48:45-05:00 Consistent pretty-printing of HsString, HsIsString, HsStrTy Factor out a helper to pretty-print string literals, thus fixing newline handling for overloaded string literals and type literals. Test cases: T26860ppr T26860ppr_overloaded T26860ppr_tylit Follow up to ddf1434ff9bb08cfef3c93f23de6b83ec698aa27 - - - - - f108a972 by Arnaud Spiwack at 2026-02-27T12:53:01-05:00 Make list comprehension completely non-linear Fixes #25081 From the note: The usefulness of list comprehension in conjunction with linear types is dubious. After all, statements are made to be run many times, for instance in ```haskell [u | y <- [0,1], stmts] ``` both `u` and `stmts` are going to be run several times. In principle, though, there are some position in a monad comprehension expression which could be considered linear. We could try and make it so that these positions are considered linear by the typechecker, but in practice the desugarer doesn't take enough care to ensure that these are indeed desugared to linear sites. We tried in the past, and it turned out that we'd miss a desugaring corner case (#25772). Until there's a demand for this very specific improvement, let's instead be conservative, and consider list comprehension to be completely non-linear. - - - - - ae799cab by Simon Jakobi at 2026-02-27T12:53:54-05:00 PmAltConSet: Use Data.Set instead of Data.Map ...to store `PmLit`s. The Map was only used to map keys to themselves. Changing the Map to a Set saves a Word of memory per entry. Resolves #26756. - - - - - dcd7819c by Vladislav Zavialov at 2026-02-27T18:46:03-05:00 Drop HsTyLit in favor of HsLit (#26862, #25121) This patch is a small step towards unification of HsExpr and HsType, taking care of literals (HsLit) and type literals (HsTyLit). Additionally, it improves error messages for unsupported type literals, such as unboxed or fractional literals (test cases: T26862, T26862_th). Changes to the AST: * Use HsLit where HsTyLit was previously used * Use HsChar where HsCharTy was previously used * Use HsString where HsStrTy was previously used * Use HsNatural (NEW) where HsNumTy was previously used * Use HsDouble (NEW) to represent unsupported fractional type literals Changes to logic: * Parse unboxed and fractional type literals (to be rejected later) * Drop the check for negative literals in the renamer (rnHsTyLit) in favor of checking in the type checker (tc_hs_lit_ty) * Check for invalid type literals in TH (repTyLit) and report unrepresentable literals with ThUnsupportedTyLit * Allow negative type literals in TH (numTyLit). This is fine as these will be taken care of at splice time (test case: T8306_th) - - - - - c927954f by Vladislav Zavialov at 2026-02-27T18:46:50-05:00 Increase test coverage of diagnostics Add test cases for the previously untested diagnostics: [GHC-01239] PsErrIfInFunAppExpr [GHC-04807] PsErrProcInFunAppExpr [GHC-08195] PsErrInvalidRecordCon [GHC-16863] PsErrUnsupportedBoxedSumPat [GHC-18910] PsErrSemiColonsInCondCmd [GHC-24737] PsErrInvalidWhereBindInPatSynDecl [GHC-25037] PsErrCaseInFunAppExpr [GHC-25078] PsErrPrecedenceOutOfRange [GHC-28021] PsErrRecordSyntaxInPatSynDecl [GHC-35827] TcRnNonOverloadedSpecialisePragma [GHC-40845] PsErrUnpackDataCon [GHC-45106] PsErrInvalidInfixHole [GHC-50396] PsErrInvalidRuleActivationMarker [GHC-63930] MultiWayIfWithoutAlts [GHC-65536] PsErrNoSingleWhereBindInPatSynDecl [GHC-67630] PsErrMDoInFunAppExpr [GHC-70526] PsErrLetCmdInFunAppCmd [GHC-77808] PsErrDoCmdInFunAppCmd [GHC-86934] ClassPE [GHC-90355] PsErrLetInFunAppExpr [GHC-91745] CasesExprWithoutAlts [GHC-92971] PsErrCaseCmdInFunAppCmd [GHC-95644] PsErrBangPatWithoutSpace [GHC-97005] PsErrIfCmdInFunAppCmd Remove unused error constructors: [GHC-44524] PsErrExpectedHyphen [GHC-91382] TcRnIllegalKindSignature - - - - - 3a9470fd by Torsten Schmits at 2026-02-27T18:47:34-05:00 Avoid expensive computation for debug logging in `mergeDatabases` when log level is low This computed and traversed a set intersection for every single dependency unconditionally. - - - - - ea4c2cbd by Brandon Chinn at 2026-02-27T16:22:38-08:00 Implement QualifiedStrings (#26503) See Note [Implementation of QualifiedStrings] - - - - - 08bc245b by sheaf at 2026-03-01T11:11:54-05:00 Clean up join points, casts & ticks This commit shores up the logic dealing with casts and ticks occurring in between a join point binding and a jump. Fixes #26642 #26929 #26693 Makes progress on #14610 #26157 #26422 Changes: - Remove 'GHC.Types.Tickish.TickishScoping' in favour of simpler predicates 'tickishHasNoScope'/'tickishHasSoftScope', as things were before commit 993975d3. This makes the code easier to read and document (fewer indirections). - Introduce 'canCollectArgsThroughTick' for consistent handling of ticks around PrimOps and other 'Id's that cannot be eta-reduced. See overhauled Note [Ticks and mandatory eta expansion]. - New Note [JoinId vs TailCallInfo] in GHC.Core.SimpleOpt that explains robustness of JoinId vs fragility of TailCallInfo. - Allow casts/non-soft-scoped ticks to occur in between a join point binder and a jump, but only in Core Prep. See Note [Join points, casts, and ticks] and Note [Join points, casts, and ticks... in Core Prep] in GHC.Core.Opt.Simplify.Iteration. Also update Core Lint to account for this. See Note [Linting join points with casts or ticks] in GHC.Core.Lint. - Update 'GHC.Core.Utils.mergeCaseAlts' to avoid pushing a cast in between a join point binding and its jumps. This fixes #26642. See the new (MC5) and (MC6) in Note [Merge Nested Cases]. - Update float out to properly handle source note ticks. They are now properly floated out instead of being discarded. This increases the number of ticks in certain tests with -g. Test cases: T26642 and TrickyJoins. Metric increase due to more source note ticks with -g: ------------------------- Metric Increase: libdir size_hello_artifact size_hello_unicode ------------------------- - - - - - 476c4cdf by Sean D. Gillespie at 2026-03-02T10:14:37-05:00 Add SIMD absolute value on x86 and LLVM On x86, absolute value of 32 bits or less is implemented with PABSB/PABSW/PABSD if SSSE3 is available. Otherwise, there is a fallback for SSE2. For 64 bit integers it uses VPABSQ, required by AVX-512VL, with fallbacks for SSE4.2 and SSE2. There is no dedicated instruction for floating point absolute value on x86, so it is simulated using bitwise AND. Absolute value for signed integers and floats are implemented by the "llvm.abs/llvm.fabs" standard library intrinsics. This implementation uses MachOps constructors, unlike non-vector floating point absolute value, which uses CallishMachOps. - - - - - 709448c0 by Sean D. Gillespie at 2026-03-02T10:14:46-05:00 Add SIMD floating point square root On x86, this is implemented with the SQRTPS and SQRTPD instructions. On LLVM, it uses the sqrt library intrinstic. - - - - - 0deadf66 by Sean D. Gillespie at 2026-03-02T10:14:47-05:00 Improve error message for SIMD on aarch64 When encountering vector literals on aarch64, previously it would throw: <no location info>: error: panic! (the 'impossible' happened) GHC version 9.15.20251219: getRegister' (CmmLit:CmmVec): Now it is more consistent with the other vector operations: <no location info>: error: sorry! (unimplemented feature or known bug) GHC version 9.15.20251219: SIMD operations on AArch64 currently require the LLVM backend - - - - - 7d64031b by Vladislav Zavialov at 2026-03-03T11:09:28-05:00 Replace maybeAddSpace with spaceIfSingleQuote Simplify pretty-printing of HsTypes by using spaceIfSingleQuote. This allows us to drop the unwieldy lhsTypeHasLeadingPromotionQuote helper function. Follow-up to 178c1fd830c78377ef5d338406a41e1d8eb5f0da - - - - - e37b0887 by Andreas Klebinger at 2026-03-05T10:55:07+01:00 Bump hackage index state and shake bounds for hadrian. Slightly nudged the lower bound to 0.18.5 for some bugfixes. Relaxed upper bound to 0.19.9 which has some neat improvements. Fixes #26884 - - - - - 272 changed files: - .gitlab/ci.sh - compiler/GHC/Builtin/Names.hs - compiler/GHC/Builtin/Types.hs - compiler/GHC/Builtin/primops.txt.pp - compiler/GHC/Cmm/MachOp.hs - compiler/GHC/Cmm/Node.hs - compiler/GHC/CmmToAsm/AArch64/CodeGen.hs - compiler/GHC/CmmToAsm/X86/CodeGen.hs - compiler/GHC/CmmToAsm/X86/Instr.hs - compiler/GHC/CmmToAsm/X86/Ppr.hs - compiler/GHC/CmmToC.hs - compiler/GHC/CmmToLlvm/CodeGen.hs - compiler/GHC/Core.hs - compiler/GHC/Core/Lint.hs - compiler/GHC/Core/Opt/Arity.hs - compiler/GHC/Core/Opt/FloatIn.hs - compiler/GHC/Core/Opt/FloatOut.hs - compiler/GHC/Core/Opt/OccurAnal.hs - compiler/GHC/Core/Opt/Simplify/Iteration.hs - compiler/GHC/Core/SimpleOpt.hs - compiler/GHC/Core/Utils.hs - compiler/GHC/CoreToStg/Prep.hs - compiler/GHC/Driver/Config/Core/Lint.hs - compiler/GHC/Driver/Config/Interpreter.hs - compiler/GHC/Driver/DynFlags.hs - compiler/GHC/Driver/Flags.hs - compiler/GHC/Driver/Session.hs - compiler/GHC/Hs/Expr.hs - compiler/GHC/Hs/Instances.hs - compiler/GHC/Hs/Lit.hs - compiler/GHC/Hs/Pat.hs - compiler/GHC/Hs/Syn/Type.hs - compiler/GHC/Hs/Type.hs - compiler/GHC/Hs/Utils.hs - compiler/GHC/HsToCore/Errors/Ppr.hs - compiler/GHC/HsToCore/Errors/Types.hs - compiler/GHC/HsToCore/Expr.hs - compiler/GHC/HsToCore/Match/Literal.hs - compiler/GHC/HsToCore/Pmc/Desugar.hs - compiler/GHC/HsToCore/Pmc/Solver/Types.hs - compiler/GHC/HsToCore/Quote.hs - compiler/GHC/HsToCore/Ticks.hs - compiler/GHC/Iface/Ext/Ast.hs - compiler/GHC/Iface/Tidy.hs - compiler/GHC/Parser.y - compiler/GHC/Parser/Errors/Ppr.hs - compiler/GHC/Parser/Errors/Types.hs - compiler/GHC/Parser/Lexer.x - compiler/GHC/Parser/PostProcess.hs - compiler/GHC/Parser/String.hs - compiler/GHC/Rename/Bind.hs - compiler/GHC/Rename/Expr.hs - compiler/GHC/Rename/HsType.hs - + compiler/GHC/Rename/Lit.hs - compiler/GHC/Rename/Pat.hs - compiler/GHC/Rename/Utils.hs - compiler/GHC/Runtime/Interpreter/Init.hs - compiler/GHC/Runtime/Interpreter/Types.hs - compiler/GHC/Runtime/Interpreter/Wasm.hs - compiler/GHC/StgToCmm/Expr.hs - compiler/GHC/StgToCmm/Prim.hs - compiler/GHC/StgToJS/Prim.hs - compiler/GHC/Tc/Errors/Ppr.hs - compiler/GHC/Tc/Errors/Types.hs - compiler/GHC/Tc/Gen/App.hs - compiler/GHC/Tc/Gen/Expr.hs - compiler/GHC/Tc/Gen/HsType.hs - compiler/GHC/Tc/Gen/Match.hs - compiler/GHC/Tc/Gen/Pat.hs - compiler/GHC/Tc/TyCl/PatSyn.hs - compiler/GHC/Tc/Types/Origin.hs - compiler/GHC/Tc/Zonk/Type.hs - compiler/GHC/ThToHs.hs - compiler/GHC/Types/Basic.hs - compiler/GHC/Types/Error/Codes.hs - compiler/GHC/Types/Id/Info.hs - compiler/GHC/Types/SourceText.hs - compiler/GHC/Types/Tickish.hs - compiler/GHC/Unit/State.hs - compiler/Language/Haskell/Syntax/Expr.hs - compiler/Language/Haskell/Syntax/Extension.hs - compiler/Language/Haskell/Syntax/Lit.hs - compiler/Language/Haskell/Syntax/Pat.hs - compiler/Language/Haskell/Syntax/Type.hs - compiler/ghc.cabal.in - + docs/users_guide/10.0.1-notes.rst - docs/users_guide/9.16.1-notes.rst - docs/users_guide/exts/explicit_namespaces.rst - + docs/users_guide/exts/qualified_strings.rst - docs/users_guide/ghci.rst - docs/users_guide/wasm.rst - ghc/GHCi/UI.hs - hadrian/build-cabal - hadrian/cabal.project - hadrian/hadrian.cabal - libraries/base/src/Control/Arrow.hs - libraries/base/src/GHC/Base.hs - libraries/base/src/GHC/Exts.hs - libraries/base/src/System/IO.hs - libraries/ghc-experimental/CHANGELOG.md - libraries/ghc-experimental/src/GHC/Stack/Annotation/Experimental.hs - + libraries/ghc-experimental/tests/Makefile - + libraries/ghc-experimental/tests/all.T - + libraries/ghc-experimental/tests/backtraces/Makefile - + libraries/ghc-experimental/tests/backtraces/T26806a.hs - + libraries/ghc-experimental/tests/backtraces/T26806a.stderr - + libraries/ghc-experimental/tests/backtraces/T26806b.hs - + libraries/ghc-experimental/tests/backtraces/T26806b.stderr - + libraries/ghc-experimental/tests/backtraces/T26806c.hs - + libraries/ghc-experimental/tests/backtraces/T26806c.stderr - + libraries/ghc-experimental/tests/backtraces/all.T - libraries/ghc-internal/src/GHC/Internal/Control/Arrow.hs - 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testsuite/tests/simd/should_run/int64x2_arith_baseline.hs - testsuite/tests/simd/should_run/int64x2_arith_baseline.stdout - testsuite/tests/simd/should_run/int8x16_arith.hs - testsuite/tests/simd/should_run/int8x16_arith.stdout - testsuite/tests/simd/should_run/int8x16_arith_baseline.hs - testsuite/tests/simd/should_run/int8x16_arith_baseline.stdout - + testsuite/tests/simplCore/should_compile/T26642.hs - + testsuite/tests/simplCore/should_compile/TrickyJoins.hs - testsuite/tests/simplCore/should_compile/all.T - + testsuite/tests/th/T26862_th.script - + testsuite/tests/th/T26862_th.stderr - + testsuite/tests/th/T8306_th.script - + testsuite/tests/th/T8306_th.stderr - + testsuite/tests/th/T8306_th.stdout - testsuite/tests/th/T8412.stderr - + testsuite/tests/th/TH_EmptyLamCases.hs - + testsuite/tests/th/TH_EmptyLamCases.stderr - + testsuite/tests/th/TH_EmptyMultiIf.hs - + testsuite/tests/th/TH_EmptyMultiIf.stderr - testsuite/tests/th/all.T - + testsuite/tests/typecheck/should_fail/T26861.hs - + testsuite/tests/typecheck/should_fail/T26861.stderr - + testsuite/tests/typecheck/should_fail/T26862.hs - + testsuite/tests/typecheck/should_fail/T26862.stderr - testsuite/tests/typecheck/should_fail/T8306.stderr - testsuite/tests/typecheck/should_fail/all.T - testsuite/tests/unboxedsums/all.T - + testsuite/tests/unboxedsums/unboxedsums4p.hs - + testsuite/tests/unboxedsums/unboxedsums4p.stderr - + testsuite/tests/warnings/should_compile/SpecMultipleTysMono.hs - + testsuite/tests/warnings/should_compile/SpecMultipleTysMono.stderr - testsuite/tests/warnings/should_compile/all.T - utils/check-exact/ExactPrint.hs - utils/haddock/haddock-api/src/Haddock/Backends/Hyperlinker/Parser.hs - utils/haddock/haddock-api/src/Haddock/Backends/LaTeX.hs - utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Decl.hs - utils/haddock/haddock-api/src/Haddock/Convert.hs - utils/haddock/haddock-api/src/Haddock/Interface/Rename.hs - utils/haddock/haddock-api/src/Haddock/Types.hs - utils/jsffi/dyld.mjs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/ae35950b627d72344865d89c9ab012… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/ae35950b627d72344865d89c9ab012… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch ghc-9.6-plinth
by Luite Stegeman (＠luite) 05 Mar '26

05 Mar '26

Luite Stegeman pushed new branch ghc-9.6-plinth at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/ghc-9.6-plinth You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/T20264] Get the types right in Prep
by Simon Peyton Jones (＠simonpj) 05 Mar '26

05 Mar '26

Simon Peyton Jones pushed to branch wip/T20264 at Glasgow Haskell Compiler / GHC Commits: 897e5543 by Simon Peyton Jones at 2026-03-05T08:36:32+00:00 Get the types right in Prep - - - - - 1 changed file: - compiler/GHC/CoreToStg/Prep.hs Changes: ===================================== compiler/GHC/CoreToStg/Prep.hs ===================================== @@ -1569,9 +1569,8 @@ cpeArg :: CorePrepEnv -> Demand -> CoreArg -> UniqSM (Floats, CpeArg) cpeArg env dmd arg = do { (floats1, arg1) <- cpeRhsE env arg -- arg1 can be a lambda - ; let arg_ty = exprType arg - lev = typeLevity arg_ty - dec = wantFloatLocal NonRecursive dmd lev floats1 arg1 + ; let lev = typeLevity (exprType arg1) + dec = wantFloatLocal NonRecursive dmd lev floats1 arg1 ; (floats2, arg2) <- executeFloatDecision env dec floats1 arg1 -- Else case: arg1 might have lambdas, and we can't -- put them inside a wrapBinds @@ -1581,7 +1580,13 @@ cpeArg env dmd arg -- see Note [ANF-ising literal string arguments] ; if exprIsTrivial arg2 then return (floats2, arg2) - else do { v <- (`setIdDemandInfo` dmd) <$> newVar env arg_ty + else do { let arg_ty = exprType arg2 + -- NB: arg_ty might not be same as (exprType arg1) because + -- the latter has the floats wrapped around it + -- E.g. let a = Int in id @a{=Int} 3 + -- exprType arg1 will be `a`, but if we didn't float then + -- exprType arg2 will be `Int` + ; v <- (`setIdDemandInfo` dmd) <$> newVar env arg_ty -- See Note [Pin demand info on floats] ; let arity = cpeArgArity env dec floats1 arg2 arg3 = cpeEtaExpand arity arg2 View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/897e554352ee4cbcbd92f4632eb1e10… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/897e554352ee4cbcbd92f4632eb1e10… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/backports-9.12.4] 8 commits: Bump exceptions submodule to 0.10.12.
by Zubin (＠wz1000) 05 Mar '26

05 Mar '26

Zubin pushed to branch wip/backports-9.12.4 at Glasgow Haskell Compiler / GHC Commits: 7630ef4e by Zubin Duggal at 2026-03-05T11:56:26+05:30 Bump exceptions submodule to 0.10.12. - - - - - 06f47576 by Zubin Duggal at 2026-03-05T11:56:26+05:30 Bump file-io submodule to 0.1.6. - - - - - 8f6f0053 by Zubin Duggal at 2026-03-05T11:56:26+05:30 Bump filepath submodule to 1.5.5.0. - - - - - 2129f6f1 by Zubin Duggal at 2026-03-05T11:56:26+05:30 Bump haskeline submodule to 0.8.4.1. - - - - - 995cb006 by Zubin Duggal at 2026-03-05T11:56:26+05:30 Bump mtl submodule to 2.3.2. - - - - - 4e021a4b by Zubin Duggal at 2026-03-05T11:56:26+05:30 Bump os-string submodule to 2.0.10. - - - - - 58d74a0c by Zubin Duggal at 2026-03-05T11:56:26+05:30 Bump unix submodule to 2.8.8.0. - - - - - 6d8735c3 by Zubin Duggal at 2026-03-05T11:56:26+05:30 Prepare release 9.12.4 - - - - - 17 changed files: - configure.ac - + docs/users_guide/9.12.4-notes.rst - docs/users_guide/release-notes.rst - libraries/base/base.cabal.in - libraries/base/changelog.md - libraries/exceptions - libraries/file-io - libraries/filepath - libraries/haskeline - libraries/mtl - libraries/os-string - libraries/unix - testsuite/tests/ghc-e/should_fail/T9930fail.stderr - testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs - testsuite/tests/interface-stability/base-exports.stdout-mingw32 - testsuite/tests/interface-stability/base-exports.stdout-ws-32 - testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32 Changes: ===================================== configure.ac ===================================== @@ -22,7 +22,7 @@ AC_INIT([The Glorious Glasgow Haskell Compilation System], [9.12.3], [glasgow-ha AC_CONFIG_MACRO_DIRS([m4]) # Set this to YES for a released version, otherwise NO -: ${RELEASE=YES} +: ${RELEASE=NO} # The primary version (e.g. 7.5, 7.4.1) is set in the AC_INIT line # above. If this is not a released version, then we will append the ===================================== docs/users_guide/9.12.4-notes.rst ===================================== @@ -0,0 +1,166 @@ +.. _release-9-12-4: + +Version 9.12.4 +============== + +The significant changes to the various parts of the compiler are listed in the +following sections. See the `migration guide +<https://gitlab.haskell.org/ghc/ghc/-/wikis/migration/9.12>`_ on the GHC Wiki +for specific guidance on migrating programs to this release. + +Compiler +~~~~~~~~ + +- Fixed a bug in CSE where the in-scope set was not properly maintained (:ghc-ticket:`25468`) +- Fixed ``matchExpectedFunTys`` to use ``tcMkScaledFunTys`` (:ghc-ticket:`26277`) +- Fixed ``parenBreakableList`` usage in ``ppHsContext`` for better pretty-printing of contexts +- Improved error messages for bad record updates to allow out-of-scope data constructors (:ghc-ticket:`26391`) +- Fixed a missing InVar->OutVar lookup in ``SetLevels`` (:ghc-ticket:`26681`) +- Fixed split sections on Windows (:ghc-ticket:`26696`, :ghc-ticket:`26494`) +- Fixed split sections for the LLVM backend (:ghc-ticket:`26770`) +- Don't re-use stack slots for growing registers (:ghc-ticket:`26668`) +- Fixed cast worker/wrapper incorrectly firing on INLINE functions (:ghc-ticket:`26903`) +- Fixed non-determinism in ``TyLitMap`` by using deterministic maps for strings (:ghc-ticket:`26846`) +- Fixed non-determinism in ``WithHsDocIdentifiers`` binary instance by using a stable sort (:ghc-ticket:`26858`) +- Added ``-mcmodel=medium`` module flag to generated LLVM IR on LoongArch +- Pass the ``mcmodel=medium`` parameter to CC via GHC on LoongArch +- Pass the ``+evex512`` attribute to LLVM 18+ when ``-mavx512f`` is set (:ghc-ticket:`26410`) +- Improved error handling in ``getPackageArchives`` (:ghc-ticket:`26383`) +- Fixed a shadowing bug in implicit parameters (:ghc-ticket:`26451`) +- Fixed a subtle bug in ``GHC.Core.Utils.mkTick`` that could generate type-incorrect code (:ghc-ticket:`26772`) +- Fixed a long-standing interaction between ticks and casts in ``Eliminate Identity Cases`` +- ``NamedDefaults``: require the class to be standard or have an in-scope default declaration (:ghc-ticket:`25775`, :ghc-ticket:`25778`) + +Runtime System +~~~~~~~~~~~~~~ + +- Fixed a deadlock with eventlog flush interval and RTS shutdown (:ghc-ticket:`26573`) +- Fixed eager black holes: record mutated closure and fix assertion (:ghc-ticket:`26495`) +- Fixed object file format detection in ``loadArchive`` (:ghc-ticket:`26630`) +- Use ``INFO_TABLE_CONSTR`` for ``stg_dummy_ret_closure`` (:ghc-ticket:`26745`) +- Fixed lost wakeups in ``threadPaused`` for threads blocked on black holes (:ghc-ticket:`26324`) +- Fixed ``stg_AP_STACK`` to push the correct update frame (:ghc-ticket:`26324`) +- Fixed potential loop in heap reservation logic on certain kernels (:ghc-ticket:`26151`) +- Don't use CAS without ``PARALLEL_GC`` on +- Switch prim to use modern atomic compiler builtins (:ghc-ticket:`26729`) +- Removed obsolete ``CC_SUPPORTS_TLS``, ``HAS_VISIBILITY_HIDDEN``, ``COMPILING_WINDOWS_DLL``, + and ``__GNUC__``-related logic +- Removed the ``-O3`` pragma hack in ``Hash.c`` +- Removed unnecessary Cabal flags + +Code Generation +~~~~~~~~~~~~~~~ + +- NCG for PPC: add pattern for ``CmmRegOff`` to ``iselExpr64`` (:ghc-ticket:`26828`) +- PPC NCG: Use libcall for 64-bit ``cmpxchg`` on 32-bit PowerPC (:ghc-ticket:`23969`) + +Bytecode Compiler +~~~~~~~~~~~~~~~~~ + +- Use 32 bits for breakpoint index (:ghc-ticket:`26325`) + +``base`` library +~~~~~~~~~~~~~~~~ + +- Expose ``Backtraces`` constructor and fields (:ghc-ticket:`26049`) +- Store ``StackTrace`` and ``StackSnapshot`` in ``Backtraces``, deferring decoding until display +- Evaluate backtraces for ``error`` exceptions at the moment they are thrown + (`CLC proposal #383 <https://github.com/haskell/core-libraries-committee/issues/383>`__, + :ghc-ticket:`26751`) + +``ghc-experimental`` library +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +- Fixed ``GHC.Exception.Backtrace.Experimental`` module +- Added ability to customise the collection of exception annotations + +``ghc-pkg`` +~~~~~~~~~~~~ + +- Removed ``traceId`` from ``ghc-pkg`` executable + +``ghc-toolchain`` +~~~~~~~~~~~~~~~~~ + +- Dropped ``ld.gold`` from merge object command + +Packaging and Build System +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +- Added ``hpc`` to release script +- Use a response file to invoke GHC when analysing dependencies +- Fixed ``GHC.Platform.Host`` generation for cross stage1 (:ghc-ticket:`26449`) +- Fixed runtime error during ``users_guide`` build with Sphinx 9.1.0 (:ghc-ticket:`26810`) +- Added ``ghc-{experimental,internal}.cabal`` to the list of dependencies of the doc target (:ghc-ticket:`26738`) +- Updated ``libffi`` to 3.5.2 +- Bumped ``directory`` submodule to 1.3.10.1 +- Bumped ``exceptions`` submodule to 0.10.12 +- Bumped ``file-io`` submodule to 0.1.6 +- Bumped ``filepath`` submodule to 1.5.5.0 +- Bumped ``haskeline`` submodule to 0.8.4.1 +- Bumped ``mtl`` submodule to 2.3.2 +- Bumped ``os-string`` submodule to 2.0.10 +- Bumped ``text`` submodule to 2.1.4 +- Bumped ``transformers`` submodule to 0.6.3.0 +- Bumped ``unix`` submodule to 2.8.8.0 +- Bumped ``Win32`` submodule to 2.14.2.1 + +Wasm Backend +~~~~~~~~~~~~ + +- Fixed dyld handling for forward declared ``GOT.func`` items (:ghc-ticket:`26430`) +- Ensure ``setKeepCAFs()`` is called in GHCi (:ghc-ticket:`26106`) +- Prevent bundlers from resolving ``import("node:timers")`` +- Use ``import.meta.main`` for proper distinction of Node.js main modules (:ghc-ticket:`26916`) + +Included libraries +~~~~~~~~~~~~~~~~~~ + +The package database provided with this distribution also contains a number of +packages other than GHC itself. See the changelogs provided with these packages +for further change information. + +.. ghc-package-list:: + + compiler/ghc.cabal: The compiler itself + libraries/array/array.cabal: Dependency of ``ghc`` library + libraries/base/base.cabal: Core library + libraries/binary/binary.cabal: Dependency of ``ghc`` library + libraries/bytestring/bytestring.cabal: Dependency of ``ghc`` library + libraries/Cabal/Cabal/Cabal.cabal: Dependency of ``ghc-pkg`` utility + libraries/Cabal/Cabal-syntax/Cabal-syntax.cabal: Dependency of ``ghc-pkg`` utility + libraries/containers/containers/containers.cabal: Dependency of ``ghc`` library + libraries/deepseq/deepseq.cabal: Dependency of ``ghc`` library + libraries/directory/directory.cabal: Dependency of ``ghc`` library + libraries/exceptions/exceptions.cabal: Dependency of ``ghc`` and ``haskeline`` library + libraries/file-io/file-io.cabal: Dependency of ``directory`` library + libraries/filepath/filepath.cabal: Dependency of ``ghc`` library + libraries/ghc-boot/ghc-boot.cabal: Internal compiler library + libraries/ghc-boot-th/ghc-boot-th.cabal: Internal compiler library + libraries/ghc-compact/ghc-compact.cabal: Core library + libraries/ghc-experimental/ghc-experimental.cabal: Core library + libraries/ghc-heap/ghc-heap.cabal: GHC heap-walking library + libraries/ghci/ghci.cabal: The REPL interface + libraries/ghc-internal/ghc-internal.cabal: Core library + libraries/ghc-platform/ghc-platform.cabal: Internal library + libraries/ghc-prim/ghc-prim.cabal: Core library + libraries/haskeline/haskeline.cabal: Dependency of ``ghci`` executable + libraries/hpc/hpc.cabal: Dependency of ``hpc`` executable + libraries/integer-gmp/integer-gmp.cabal: Core library + libraries/mtl/mtl.cabal: Dependency of ``Cabal`` library + libraries/os-string/os-string.cabal: Dependency of ``filepath`` library + libraries/parsec/parsec.cabal: Dependency of ``Cabal`` library + libraries/pretty/pretty.cabal: Dependency of ``ghc`` library + libraries/process/process.cabal: Dependency of ``ghc`` library + libraries/semaphore-compat/semaphore-compat.cabal: Dependency of ``ghc`` library + libraries/stm/stm.cabal: Dependency of ``haskeline`` library + libraries/template-haskell/template-haskell.cabal: Core library + libraries/terminfo/terminfo.cabal: Dependency of ``haskeline`` library + libraries/text/text.cabal: Dependency of ``Cabal`` library + libraries/time/time.cabal: Dependency of ``ghc`` library + libraries/transformers/transformers.cabal: Dependency of ``ghc`` library + libraries/unix/unix.cabal: Dependency of ``ghc`` library + libraries/Win32/Win32.cabal: Dependency of ``ghc`` library + libraries/xhtml/xhtml.cabal: Dependency of ``haddock`` executable + utils/haddock/haddock-api/haddock-api.cabal: Dependency of ``haddock`` executable + utils/haddock/haddock-library/haddock-library.cabal: Dependency of ``haddock`` executable ===================================== docs/users_guide/release-notes.rst ===================================== @@ -7,3 +7,4 @@ Release notes 9.12.1-notes 9.12.2-notes 9.12.3-notes + 9.12.4-notes ===================================== libraries/base/base.cabal.in ===================================== @@ -4,7 +4,7 @@ cabal-version: 3.0 -- Make sure you are editing ghc-experimental.cabal.in, not ghc-experimental.cabal name: base -version: 4.21.1.0 +version: 4.21.2.0 -- NOTE: Don't forget to update ./changelog.md license: BSD-3-Clause ===================================== libraries/base/changelog.md ===================================== @@ -1,7 +1,9 @@ # Changelog for [`base` package](http://hackage.haskell.org/package/base) -## 4.21.2.0 *TBA* - * Evaluate backtraces for "error" exceptions at the moment they are thrown. ([CLC proposal #383](https://github.com/haskell/core-libraries-committee/issues/383)) +## 4.21.2.0 *March 2026* + * Expose `Backtraces` constructor and fields ([CLC proposal #199](https://github.com/haskell/core-libraries-committee/issues/199), [#26049](https://gitlab.haskell.org/ghc/ghc/-/issues/26049)) + * Store `StackTrace` and `StackSnapshot` in `Backtraces`, deferring decoding until display + * Evaluate backtraces for "error" exceptions at the moment they are thrown ([CLC proposal #383](https://github.com/haskell/core-libraries-committee/issues/383), [#26751](https://gitlab.haskell.org/ghc/ghc/-/issues/26751)) ## 4.21.1.0 *Sept 2024* * Fix incorrect results of `integerPowMod` when the base is 0 and the exponent is negative, and `integerRecipMod` when the modulus is zero ([#26017](https://gitlab.haskell.org/ghc/ghc/-/issues/26017)). ===================================== libraries/exceptions ===================================== @@ -1 +1 @@ -Subproject commit b3a88ccc70acd7aa83be64235ab8c3ef1f08e96b +Subproject commit a3da039855479e3c8542e8b45986599d0414ff68 ===================================== libraries/file-io ===================================== @@ -1 +1 @@ -Subproject commit 21303160b5dd91d6197bd1d20a8796ba2a819d4e +Subproject commit 516e57977dfc031de5e00e8fc0bf5ab4cc6802f5 ===================================== libraries/filepath ===================================== @@ -1 +1 @@ -Subproject commit 65b0f8f31aac4a306135e27734988327f8eb1e6f +Subproject commit baac7d7e76449f76fc6785e77206edb5530b6bfb ===================================== libraries/haskeline ===================================== @@ -1 +1 @@ -Subproject commit 5f4bf62bf1f4846ad0b8d1fa9d45f902e3934511 +Subproject commit d0d8902f88fde549f76771feeb40f16941a22a9f ===================================== libraries/mtl ===================================== @@ -1 +1 @@ -Subproject commit 37cbd924cb71eba591a2e2b6b131767f632d22c9 +Subproject commit 4b5080f43cbc372a437d5fecb144c7b75aadd86b ===================================== libraries/os-string ===================================== @@ -1 +1 @@ -Subproject commit c08666bf7bf528e607fc1eacc20032ec59e69df3 +Subproject commit 71f66e1af2288867becaa567dfb10c1d791b0343 ===================================== libraries/unix ===================================== @@ -1 +1 @@ -Subproject commit 90e7d70de337ad759102b2445ebef6980684a9d3 +Subproject commit 60f432b76871bd7787df07dd3e2a567caba393f5 ===================================== testsuite/tests/ghc-e/should_fail/T9930fail.stderr ===================================== @@ -7,5 +7,7 @@ While handling default output name would overwrite the input file; must specify | Usage: For basic information, try the `--help' option. HasCallStack backtrace: - bracket, called at compiler/GHC/Driver/Make.hs:2955:3 in ghc-9.13-inplace:GHC.Driver.Make + throwIO, called at libraries/exceptions/src/Control/Monad/Catch.hs:371:13 in exceptions-0.10.12-inplace:Control.Monad.Catch + throwM, called at libraries/exceptions/src/Control/Monad/Catch.hs:860:36 in exceptions-0.10.12-inplace:Control.Monad.Catch + onException, called at compiler/GHC/Driver/Make.hs:2955:3 in ghc-9.13-inplace:GHC.Driver.Make ===================================== testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs ===================================== @@ -322,7 +322,7 @@ module Control.Exception.Backtrace where type BacktraceMechanism :: * data BacktraceMechanism = CostCentreBacktrace | HasCallStackBacktrace | ExecutionBacktrace | IPEBacktrace type Backtraces :: * - data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe [GHC.Internal.ExecutionStack.Internal.Location], btrIpe :: GHC.Internal.Maybe.Maybe [GHC.Internal.Stack.CloneStack.StackEntry]} + data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot} collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Types.IO Backtraces displayBacktraces :: Backtraces -> GHC.Internal.Base.String getBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.IO GHC.Types.Bool ===================================== testsuite/tests/interface-stability/base-exports.stdout-mingw32 ===================================== @@ -322,7 +322,7 @@ module Control.Exception.Backtrace where type BacktraceMechanism :: * data BacktraceMechanism = CostCentreBacktrace | HasCallStackBacktrace | ExecutionBacktrace | IPEBacktrace type Backtraces :: * - data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe [GHC.Internal.ExecutionStack.Internal.Location], btrIpe :: GHC.Internal.Maybe.Maybe [GHC.Internal.Stack.CloneStack.StackEntry]} + data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot} collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Types.IO Backtraces displayBacktraces :: Backtraces -> GHC.Internal.Base.String getBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.IO GHC.Types.Bool ===================================== testsuite/tests/interface-stability/base-exports.stdout-ws-32 ===================================== @@ -322,7 +322,7 @@ module Control.Exception.Backtrace where type BacktraceMechanism :: * data BacktraceMechanism = CostCentreBacktrace | HasCallStackBacktrace | ExecutionBacktrace | IPEBacktrace type Backtraces :: * - data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe [GHC.Internal.ExecutionStack.Internal.Location], btrIpe :: GHC.Internal.Maybe.Maybe [GHC.Internal.Stack.CloneStack.StackEntry]} + data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot} collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Types.IO Backtraces displayBacktraces :: Backtraces -> GHC.Internal.Base.String getBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.IO GHC.Types.Bool ===================================== testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32 ===================================== @@ -4324,13 +4324,13 @@ module GHC.Exception.Backtrace.Experimental where data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot} type CollectExceptionAnnotationMechanism :: * data CollectExceptionAnnotationMechanism = ... - collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Internal.Types.IO Backtraces - collectExceptionAnnotation :: GHC.Internal.Stack.Types.HasCallStack => GHC.Internal.Types.IO GHC.Internal.Exception.Context.SomeExceptionAnnotation + collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Types.IO Backtraces + collectExceptionAnnotation :: GHC.Internal.Stack.Types.HasCallStack => GHC.Types.IO GHC.Internal.Exception.Context.SomeExceptionAnnotation displayBacktraces :: Backtraces -> GHC.Internal.Base.String - getBacktraceMechanismState :: BacktraceMechanism -> GHC.Internal.Types.IO GHC.Internal.Types.Bool - getCollectExceptionAnnotationMechanism :: GHC.Internal.Types.IO CollectExceptionAnnotationMechanism - setBacktraceMechanismState :: BacktraceMechanism -> GHC.Internal.Types.Bool -> GHC.Internal.Types.IO () - setCollectExceptionAnnotation :: forall a. GHC.Internal.Exception.Context.ExceptionAnnotation a => (GHC.Internal.Stack.Types.HasCallStack => GHC.Internal.Types.IO a) -> GHC.Internal.Types.IO () + getBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.IO GHC.Types.Bool + getCollectExceptionAnnotationMechanism :: GHC.Types.IO CollectExceptionAnnotationMechanism + setBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.Bool -> GHC.Types.IO () + setCollectExceptionAnnotation :: forall a. GHC.Internal.Exception.Context.ExceptionAnnotation a => (GHC.Internal.Stack.Types.HasCallStack => GHC.Types.IO a) -> GHC.Types.IO () module GHC.PrimOps where -- Safety: Unsafe View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/3ff8c5c12cad03c0c1ed02cc9159b1… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/3ff8c5c12cad03c0c1ed02cc9159b1… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/backports-9.12.4] Prepare release 9.12.4
by Zubin (＠wz1000) 05 Mar '26

05 Mar '26

Zubin pushed to branch wip/backports-9.12.4 at Glasgow Haskell Compiler / GHC Commits: 3ff8c5c1 by Zubin Duggal at 2026-03-05T11:09:31+05:30 Prepare release 9.12.4 - - - - - 9 changed files: - configure.ac - + docs/users_guide/9.12.4-notes.rst - docs/users_guide/release-notes.rst - libraries/base/base.cabal.in - libraries/base/changelog.md - testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs - testsuite/tests/interface-stability/base-exports.stdout-mingw32 - testsuite/tests/interface-stability/base-exports.stdout-ws-32 - testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32 Changes: ===================================== configure.ac ===================================== @@ -22,7 +22,7 @@ AC_INIT([The Glorious Glasgow Haskell Compilation System], [9.12.3], [glasgow-ha AC_CONFIG_MACRO_DIRS([m4]) # Set this to YES for a released version, otherwise NO -: ${RELEASE=YES} +: ${RELEASE=NO} # The primary version (e.g. 7.5, 7.4.1) is set in the AC_INIT line # above. If this is not a released version, then we will append the ===================================== docs/users_guide/9.12.4-notes.rst ===================================== @@ -0,0 +1,166 @@ +.. _release-9-12-4: + +Version 9.12.4 +============== + +The significant changes to the various parts of the compiler are listed in the +following sections. See the `migration guide +<https://gitlab.haskell.org/ghc/ghc/-/wikis/migration/9.12>`_ on the GHC Wiki +for specific guidance on migrating programs to this release. + +Compiler +~~~~~~~~ + +- Fixed a bug in CSE where the in-scope set was not properly maintained (:ghc-ticket:`25468`) +- Fixed ``matchExpectedFunTys`` to use ``tcMkScaledFunTys`` (:ghc-ticket:`26277`) +- Fixed ``parenBreakableList`` usage in ``ppHsContext`` for better pretty-printing of contexts +- Improved error messages for bad record updates to allow out-of-scope data constructors (:ghc-ticket:`26391`) +- Fixed a missing InVar->OutVar lookup in ``SetLevels`` (:ghc-ticket:`26681`) +- Fixed split sections on Windows (:ghc-ticket:`26696`, :ghc-ticket:`26494`) +- Fixed split sections for the LLVM backend (:ghc-ticket:`26770`) +- Don't re-use stack slots for growing registers (:ghc-ticket:`26668`) +- Fixed cast worker/wrapper incorrectly firing on INLINE functions (:ghc-ticket:`26903`) +- Fixed non-determinism in ``TyLitMap`` by using deterministic maps for strings (:ghc-ticket:`26846`) +- Fixed non-determinism in ``WithHsDocIdentifiers`` binary instance by using a stable sort (:ghc-ticket:`26858`) +- Added ``-mcmodel=medium`` module flag to generated LLVM IR on LoongArch +- Pass the ``mcmodel=medium`` parameter to CC via GHC on LoongArch +- Pass the ``+evex512`` attribute to LLVM 18+ when ``-mavx512f`` is set (:ghc-ticket:`26410`) +- Improved error handling in ``getPackageArchives`` (:ghc-ticket:`26383`) +- Fixed a shadowing bug in implicit parameters (:ghc-ticket:`26451`) +- Fixed a subtle bug in ``GHC.Core.Utils.mkTick`` that could generate type-incorrect code (:ghc-ticket:`26772`) +- Fixed a long-standing interaction between ticks and casts in ``Eliminate Identity Cases`` +- ``NamedDefaults``: require the class to be standard or have an in-scope default declaration (:ghc-ticket:`25775`, :ghc-ticket:`25778`) + +Runtime System +~~~~~~~~~~~~~~ + +- Fixed a deadlock with eventlog flush interval and RTS shutdown (:ghc-ticket:`26573`) +- Fixed eager black holes: record mutated closure and fix assertion (:ghc-ticket:`26495`) +- Fixed object file format detection in ``loadArchive`` (:ghc-ticket:`26630`) +- Use ``INFO_TABLE_CONSTR`` for ``stg_dummy_ret_closure`` (:ghc-ticket:`26745`) +- Fixed lost wakeups in ``threadPaused`` for threads blocked on black holes (:ghc-ticket:`26324`) +- Fixed ``stg_AP_STACK`` to push the correct update frame (:ghc-ticket:`26324`) +- Fixed potential loop in heap reservation logic on certain kernels (:ghc-ticket:`26151`) +- Don't use CAS without ``PARALLEL_GC`` on +- Switch prim to use modern atomic compiler builtins (:ghc-ticket:`26729`) +- Removed obsolete ``CC_SUPPORTS_TLS``, ``HAS_VISIBILITY_HIDDEN``, ``COMPILING_WINDOWS_DLL``, + and ``__GNUC__``-related logic +- Removed the ``-O3`` pragma hack in ``Hash.c`` +- Removed unnecessary Cabal flags + +Code Generation +~~~~~~~~~~~~~~~ + +- NCG for PPC: add pattern for ``CmmRegOff`` to ``iselExpr64`` (:ghc-ticket:`26828`) +- PPC NCG: Use libcall for 64-bit ``cmpxchg`` on 32-bit PowerPC (:ghc-ticket:`23969`) + +Bytecode Compiler +~~~~~~~~~~~~~~~~~ + +- Use 32 bits for breakpoint index (:ghc-ticket:`26325`) + +``base`` library +~~~~~~~~~~~~~~~~ + +- Expose ``Backtraces`` constructor and fields (:ghc-ticket:`26049`) +- Store ``StackTrace`` and ``StackSnapshot`` in ``Backtraces``, deferring decoding until display +- Evaluate backtraces for ``error`` exceptions at the moment they are thrown + (`CLC proposal #383 <https://github.com/haskell/core-libraries-committee/issues/383>`__, + :ghc-ticket:`26751`) + +``ghc-experimental`` library +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +- Fixed ``GHC.Exception.Backtrace.Experimental`` module +- Added ability to customise the collection of exception annotations + +``ghc-pkg`` +~~~~~~~~~~~~ + +- Removed ``traceId`` from ``ghc-pkg`` executable + +``ghc-toolchain`` +~~~~~~~~~~~~~~~~~ + +- Dropped ``ld.gold`` from merge object command + +Packaging and Build System +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +- Added ``hpc`` to release script +- Use a response file to invoke GHC when analysing dependencies +- Fixed ``GHC.Platform.Host`` generation for cross stage1 (:ghc-ticket:`26449`) +- Fixed runtime error during ``users_guide`` build with Sphinx 9.1.0 (:ghc-ticket:`26810`) +- Added ``ghc-{experimental,internal}.cabal`` to the list of dependencies of the doc target (:ghc-ticket:`26738`) +- Updated ``libffi`` to 3.5.2 +- Bumped ``directory`` submodule to 1.3.10.1 +- Bumped ``exceptions`` submodule to 0.10.12 +- Bumped ``file-io`` submodule to 0.1.6 +- Bumped ``filepath`` submodule to 1.5.5.0 +- Bumped ``haskeline`` submodule to 0.8.4.1 +- Bumped ``mtl`` submodule to 2.3.2 +- Bumped ``os-string`` submodule to 2.0.10 +- Bumped ``text`` submodule to 2.1.4 +- Bumped ``transformers`` submodule to 0.6.3.0 +- Bumped ``unix`` submodule to 2.8.8.0 +- Bumped ``Win32`` submodule to 2.14.2.1 + +Wasm Backend +~~~~~~~~~~~~ + +- Fixed dyld handling for forward declared ``GOT.func`` items (:ghc-ticket:`26430`) +- Ensure ``setKeepCAFs()`` is called in GHCi (:ghc-ticket:`26106`) +- Prevent bundlers from resolving ``import("node:timers")`` +- Use ``import.meta.main`` for proper distinction of Node.js main modules (:ghc-ticket:`26916`) + +Included libraries +~~~~~~~~~~~~~~~~~~ + +The package database provided with this distribution also contains a number of +packages other than GHC itself. See the changelogs provided with these packages +for further change information. + +.. ghc-package-list:: + + compiler/ghc.cabal: The compiler itself + libraries/array/array.cabal: Dependency of ``ghc`` library + libraries/base/base.cabal: Core library + libraries/binary/binary.cabal: Dependency of ``ghc`` library + libraries/bytestring/bytestring.cabal: Dependency of ``ghc`` library + libraries/Cabal/Cabal/Cabal.cabal: Dependency of ``ghc-pkg`` utility + libraries/Cabal/Cabal-syntax/Cabal-syntax.cabal: Dependency of ``ghc-pkg`` utility + libraries/containers/containers/containers.cabal: Dependency of ``ghc`` library + libraries/deepseq/deepseq.cabal: Dependency of ``ghc`` library + libraries/directory/directory.cabal: Dependency of ``ghc`` library + libraries/exceptions/exceptions.cabal: Dependency of ``ghc`` and ``haskeline`` library + libraries/file-io/file-io.cabal: Dependency of ``directory`` library + libraries/filepath/filepath.cabal: Dependency of ``ghc`` library + libraries/ghc-boot/ghc-boot.cabal: Internal compiler library + libraries/ghc-boot-th/ghc-boot-th.cabal: Internal compiler library + libraries/ghc-compact/ghc-compact.cabal: Core library + libraries/ghc-experimental/ghc-experimental.cabal: Core library + libraries/ghc-heap/ghc-heap.cabal: GHC heap-walking library + libraries/ghci/ghci.cabal: The REPL interface + libraries/ghc-internal/ghc-internal.cabal: Core library + libraries/ghc-platform/ghc-platform.cabal: Internal library + libraries/ghc-prim/ghc-prim.cabal: Core library + libraries/haskeline/haskeline.cabal: Dependency of ``ghci`` executable + libraries/hpc/hpc.cabal: Dependency of ``hpc`` executable + libraries/integer-gmp/integer-gmp.cabal: Core library + libraries/mtl/mtl.cabal: Dependency of ``Cabal`` library + libraries/os-string/os-string.cabal: Dependency of ``filepath`` library + libraries/parsec/parsec.cabal: Dependency of ``Cabal`` library + libraries/pretty/pretty.cabal: Dependency of ``ghc`` library + libraries/process/process.cabal: Dependency of ``ghc`` library + libraries/semaphore-compat/semaphore-compat.cabal: Dependency of ``ghc`` library + libraries/stm/stm.cabal: Dependency of ``haskeline`` library + libraries/template-haskell/template-haskell.cabal: Core library + libraries/terminfo/terminfo.cabal: Dependency of ``haskeline`` library + libraries/text/text.cabal: Dependency of ``Cabal`` library + libraries/time/time.cabal: Dependency of ``ghc`` library + libraries/transformers/transformers.cabal: Dependency of ``ghc`` library + libraries/unix/unix.cabal: Dependency of ``ghc`` library + libraries/Win32/Win32.cabal: Dependency of ``ghc`` library + libraries/xhtml/xhtml.cabal: Dependency of ``haddock`` executable + utils/haddock/haddock-api/haddock-api.cabal: Dependency of ``haddock`` executable + utils/haddock/haddock-library/haddock-library.cabal: Dependency of ``haddock`` executable ===================================== docs/users_guide/release-notes.rst ===================================== @@ -7,3 +7,4 @@ Release notes 9.12.1-notes 9.12.2-notes 9.12.3-notes + 9.12.4-notes ===================================== libraries/base/base.cabal.in ===================================== @@ -4,7 +4,7 @@ cabal-version: 3.0 -- Make sure you are editing ghc-experimental.cabal.in, not ghc-experimental.cabal name: base -version: 4.21.1.0 +version: 4.21.2.0 -- NOTE: Don't forget to update ./changelog.md license: BSD-3-Clause ===================================== libraries/base/changelog.md ===================================== @@ -1,7 +1,9 @@ # Changelog for [`base` package](http://hackage.haskell.org/package/base) -## 4.21.2.0 *TBA* - * Evaluate backtraces for "error" exceptions at the moment they are thrown. ([CLC proposal #383](https://github.com/haskell/core-libraries-committee/issues/383)) +## 4.21.2.0 *March 2026* + * Expose `Backtraces` constructor and fields ([CLC proposal #199](https://github.com/haskell/core-libraries-committee/issues/199), [#26049](https://gitlab.haskell.org/ghc/ghc/-/issues/26049)) + * Store `StackTrace` and `StackSnapshot` in `Backtraces`, deferring decoding until display + * Evaluate backtraces for "error" exceptions at the moment they are thrown ([CLC proposal #383](https://github.com/haskell/core-libraries-committee/issues/383), [#26751](https://gitlab.haskell.org/ghc/ghc/-/issues/26751)) ## 4.21.1.0 *Sept 2024* * Fix incorrect results of `integerPowMod` when the base is 0 and the exponent is negative, and `integerRecipMod` when the modulus is zero ([#26017](https://gitlab.haskell.org/ghc/ghc/-/issues/26017)). ===================================== testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs ===================================== @@ -322,7 +322,7 @@ module Control.Exception.Backtrace where type BacktraceMechanism :: * data BacktraceMechanism = CostCentreBacktrace | HasCallStackBacktrace | ExecutionBacktrace | IPEBacktrace type Backtraces :: * - data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe [GHC.Internal.ExecutionStack.Internal.Location], btrIpe :: GHC.Internal.Maybe.Maybe [GHC.Internal.Stack.CloneStack.StackEntry]} + data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot} collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Types.IO Backtraces displayBacktraces :: Backtraces -> GHC.Internal.Base.String getBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.IO GHC.Types.Bool ===================================== testsuite/tests/interface-stability/base-exports.stdout-mingw32 ===================================== @@ -322,7 +322,7 @@ module Control.Exception.Backtrace where type BacktraceMechanism :: * data BacktraceMechanism = CostCentreBacktrace | HasCallStackBacktrace | ExecutionBacktrace | IPEBacktrace type Backtraces :: * - data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe [GHC.Internal.ExecutionStack.Internal.Location], btrIpe :: GHC.Internal.Maybe.Maybe [GHC.Internal.Stack.CloneStack.StackEntry]} + data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot} collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Types.IO Backtraces displayBacktraces :: Backtraces -> GHC.Internal.Base.String getBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.IO GHC.Types.Bool ===================================== testsuite/tests/interface-stability/base-exports.stdout-ws-32 ===================================== @@ -322,7 +322,7 @@ module Control.Exception.Backtrace where type BacktraceMechanism :: * data BacktraceMechanism = CostCentreBacktrace | HasCallStackBacktrace | ExecutionBacktrace | IPEBacktrace type Backtraces :: * - data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe [GHC.Internal.ExecutionStack.Internal.Location], btrIpe :: GHC.Internal.Maybe.Maybe [GHC.Internal.Stack.CloneStack.StackEntry]} + data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot} collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Types.IO Backtraces displayBacktraces :: Backtraces -> GHC.Internal.Base.String getBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.IO GHC.Types.Bool ===================================== testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32 ===================================== @@ -4324,13 +4324,13 @@ module GHC.Exception.Backtrace.Experimental where data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot} type CollectExceptionAnnotationMechanism :: * data CollectExceptionAnnotationMechanism = ... - collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Internal.Types.IO Backtraces - collectExceptionAnnotation :: GHC.Internal.Stack.Types.HasCallStack => GHC.Internal.Types.IO GHC.Internal.Exception.Context.SomeExceptionAnnotation + collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Types.IO Backtraces + collectExceptionAnnotation :: GHC.Internal.Stack.Types.HasCallStack => GHC.Types.IO GHC.Internal.Exception.Context.SomeExceptionAnnotation displayBacktraces :: Backtraces -> GHC.Internal.Base.String - getBacktraceMechanismState :: BacktraceMechanism -> GHC.Internal.Types.IO GHC.Internal.Types.Bool - getCollectExceptionAnnotationMechanism :: GHC.Internal.Types.IO CollectExceptionAnnotationMechanism - setBacktraceMechanismState :: BacktraceMechanism -> GHC.Internal.Types.Bool -> GHC.Internal.Types.IO () - setCollectExceptionAnnotation :: forall a. GHC.Internal.Exception.Context.ExceptionAnnotation a => (GHC.Internal.Stack.Types.HasCallStack => GHC.Internal.Types.IO a) -> GHC.Internal.Types.IO () + getBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.IO GHC.Types.Bool + getCollectExceptionAnnotationMechanism :: GHC.Types.IO CollectExceptionAnnotationMechanism + setBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.Bool -> GHC.Types.IO () + setCollectExceptionAnnotation :: forall a. GHC.Internal.Exception.Context.ExceptionAnnotation a => (GHC.Internal.Stack.Types.HasCallStack => GHC.Types.IO a) -> GHC.Types.IO () module GHC.PrimOps where -- Safety: Unsafe View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/3ff8c5c12cad03c0c1ed02cc9159b16… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/3ff8c5c12cad03c0c1ed02cc9159b16… You're receiving this email because of your account on gitlab.haskell.org.

1 0

[Git][ghc/ghc][wip/backports-9.12.4] 10 commits: Bump Win32 submodule to 2.14.2.1.
by Zubin (＠wz1000) 05 Mar '26

05 Mar '26

Zubin pushed to branch wip/backports-9.12.4 at Glasgow Haskell Compiler / GHC Commits: 2ee8a948 by Zubin Duggal at 2026-03-05T10:59:34+05:30 Bump Win32 submodule to 2.14.2.1. - - - - - 928c81aa by Zubin Duggal at 2026-03-05T10:59:35+05:30 Bump directory submodule to 1.3.10.1. - - - - - 6377207a by Zubin Duggal at 2026-03-05T10:59:35+05:30 Bump exceptions submodule to 0.10.12. - - - - - 6b32321d by Zubin Duggal at 2026-03-05T10:59:35+05:30 Bump file-io submodule to 0.1.6. - - - - - 287e618e by Zubin Duggal at 2026-03-05T10:59:35+05:30 Bump filepath submodule to 1.5.5.0. - - - - - fb5464e6 by Zubin Duggal at 2026-03-05T10:59:35+05:30 Bump haskeline submodule to 0.8.4.1. - - - - - 8800f521 by Zubin Duggal at 2026-03-05T10:59:35+05:30 Bump mtl submodule to 2.3.2. - - - - - 83f5b0de by Zubin Duggal at 2026-03-05T10:59:35+05:30 Bump os-string submodule to 2.0.10. - - - - - e47e83a0 by Zubin Duggal at 2026-03-05T10:59:35+05:30 Bump unix submodule to 2.8.8.0. - - - - - 3825a5ed by Zubin Duggal at 2026-03-05T10:59:35+05:30 Prepare release 9.12.4 - - - - - 18 changed files: - configure.ac - + docs/users_guide/9.12.4-notes.rst - docs/users_guide/release-notes.rst - libraries/Win32 - libraries/base/base.cabal.in - libraries/base/changelog.md - libraries/directory - libraries/exceptions - libraries/file-io - libraries/filepath - libraries/haskeline - libraries/mtl - libraries/os-string - libraries/unix - testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs - testsuite/tests/interface-stability/base-exports.stdout-mingw32 - testsuite/tests/interface-stability/base-exports.stdout-ws-32 - testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32 Changes: ===================================== configure.ac ===================================== @@ -22,7 +22,7 @@ AC_INIT([The Glorious Glasgow Haskell Compilation System], [9.12.3], [glasgow-ha AC_CONFIG_MACRO_DIRS([m4]) # Set this to YES for a released version, otherwise NO -: ${RELEASE=YES} +: ${RELEASE=NO} # The primary version (e.g. 7.5, 7.4.1) is set in the AC_INIT line # above. If this is not a released version, then we will append the ===================================== docs/users_guide/9.12.4-notes.rst ===================================== @@ -0,0 +1,154 @@ +.. _release-9-12-4: + +Version 9.12.4 +============== + +The significant changes to the various parts of the compiler are listed in the +following sections. See the `migration guide +<https://gitlab.haskell.org/ghc/ghc/-/wikis/migration/9.12>`_ on the GHC Wiki +for specific guidance on migrating programs to this release. + +Compiler +~~~~~~~~ + +- Fixed a bug in CSE where the in-scope set was not properly maintained (:ghc-ticket:`25468`) +- Fixed ``matchExpectedFunTys`` to use ``tcMkScaledFunTys`` (:ghc-ticket:`26277`) +- Fixed ``parenBreakableList`` usage in ``ppHsContext`` for better pretty-printing of contexts +- Improved error messages for bad record updates to allow out-of-scope data constructors (:ghc-ticket:`26391`) +- Fixed a missing InVar->OutVar lookup in ``SetLevels`` (:ghc-ticket:`26681`) +- Fixed split sections on Windows (:ghc-ticket:`26696`, :ghc-ticket:`26494`) +- Fixed split sections for the LLVM backend (:ghc-ticket:`26770`) +- Don't re-use stack slots for growing registers (:ghc-ticket:`26668`) +- Fixed cast worker/wrapper incorrectly firing on INLINE functions (:ghc-ticket:`26903`) +- Fixed non-determinism in ``TyLitMap`` by using deterministic maps for strings (:ghc-ticket:`26846`) +- Fixed non-determinism in ``WithHsDocIdentifiers`` binary instance by using a stable sort (:ghc-ticket:`26858`) +- Added ``-mcmodel=medium`` module flag to generated LLVM IR on LoongArch +- Pass the ``mcmodel=medium`` parameter to CC via GHC on LoongArch +- Pass the ``+evex512`` attribute to LLVM 18+ when ``-mavx512f`` is set (:ghc-ticket:`26410`) +- Improved error handling in ``getPackageArchives`` (:ghc-ticket:`26383`) +- Fixed a shadowing bug in implicit parameters (:ghc-ticket:`26451`) +- Fixed a subtle bug in ``GHC.Core.Utils.mkTick`` that could generate type-incorrect code (:ghc-ticket:`26772`) +- Fixed a long-standing interaction between ticks and casts in ``Eliminate Identity Cases`` +- ``NamedDefaults``: require the class to be standard or have an in-scope default declaration (:ghc-ticket:`25775`, :ghc-ticket:`25778`) + +Runtime System +~~~~~~~~~~~~~~ + +- Fixed a deadlock with eventlog flush interval and RTS shutdown (:ghc-ticket:`26573`) +- Fixed eager black holes: record mutated closure and fix assertion (:ghc-ticket:`26495`) +- Fixed object file format detection in ``loadArchive`` (:ghc-ticket:`26630`) +- Use ``INFO_TABLE_CONSTR`` for ``stg_dummy_ret_closure`` (:ghc-ticket:`26745`) +- Fixed lost wakeups in ``threadPaused`` for threads blocked on black holes (:ghc-ticket:`26324`) +- Fixed ``stg_AP_STACK`` to push the correct update frame (:ghc-ticket:`26324`) +- Fixed potential loop in heap reservation logic on certain kernels (:ghc-ticket:`26151`) +- Don't use CAS without ``PARALLEL_GC`` on +- Switch prim to use modern atomic compiler builtins (:ghc-ticket:`26729`) +- Removed obsolete ``CC_SUPPORTS_TLS``, ``HAS_VISIBILITY_HIDDEN``, ``COMPILING_WINDOWS_DLL``, + and ``__GNUC__``-related logic +- Removed the ``-O3`` pragma hack in ``Hash.c`` +- Removed unnecessary Cabal flags + +Code Generation +~~~~~~~~~~~~~~~ + +- NCG for PPC: add pattern for ``CmmRegOff`` to ``iselExpr64`` (:ghc-ticket:`26828`) +- PPC NCG: Use libcall for 64-bit ``cmpxchg`` on 32-bit PowerPC (:ghc-ticket:`23969`) + +Bytecode Compiler +~~~~~~~~~~~~~~~~~ + +- Use 32 bits for breakpoint index (:ghc-ticket:`26325`) + +``base`` library +~~~~~~~~~~~~~~~~ + +- Expose ``Backtraces`` constructor and fields (:ghc-ticket:`26049`) +- Store ``StackTrace`` and ``StackSnapshot`` in ``Backtraces``, deferring decoding until display +- Evaluate backtraces for ``error`` exceptions at the moment they are thrown + (`CLC proposal #383 <https://github.com/haskell/core-libraries-committee/issues/383>`__, + :ghc-ticket:`26751`) + +``ghc-experimental`` library +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +- Fixed ``GHC.Exception.Backtrace.Experimental`` module +- Added ability to customise the collection of exception annotations + +``ghc-pkg`` +~~~~~~~~~~~~ + +- Removed ``traceId`` from ``ghc-pkg`` executable + +``ghc-toolchain`` +~~~~~~~~~~~~~~~~~ + +- Dropped ``ld.gold`` from merge object command + +Build System +~~~~~~~~~~~~ + +- Added ``hpc`` to release script +- Use a response file to invoke GHC when analysing dependencies +- Fixed ``GHC.Platform.Host`` generation for cross stage1 (:ghc-ticket:`26449`) +- Fixed runtime error during ``users_guide`` build with Sphinx 9.1.0 (:ghc-ticket:`26810`) +- Added ``ghc-{experimental,internal}.cabal`` to the list of dependencies of the doc target (:ghc-ticket:`26738`) + +Wasm Backend +~~~~~~~~~~~~ + +- Fixed dyld handling for forward declared ``GOT.func`` items (:ghc-ticket:`26430`) +- Ensure ``setKeepCAFs()`` is called in GHCi (:ghc-ticket:`26106`) +- Prevent bundlers from resolving ``import("node:timers")`` +- Use ``import.meta.main`` for proper distinction of Node.js main modules (:ghc-ticket:`26916`) + +Included libraries +~~~~~~~~~~~~~~~~~~ + +The package database provided with this distribution also contains a number of +packages other than GHC itself. See the changelogs provided with these packages +for further change information. + +.. ghc-package-list:: + + compiler/ghc.cabal: The compiler itself + libraries/array/array.cabal: Dependency of ``ghc`` library + libraries/base/base.cabal: Core library + libraries/binary/binary.cabal: Dependency of ``ghc`` library + libraries/bytestring/bytestring.cabal: Dependency of ``ghc`` library + libraries/Cabal/Cabal/Cabal.cabal: Dependency of ``ghc-pkg`` utility + libraries/Cabal/Cabal-syntax/Cabal-syntax.cabal: Dependency of ``ghc-pkg`` utility + libraries/containers/containers/containers.cabal: Dependency of ``ghc`` library + libraries/deepseq/deepseq.cabal: Dependency of ``ghc`` library + libraries/directory/directory.cabal: Dependency of ``ghc`` library + libraries/exceptions/exceptions.cabal: Dependency of ``ghc`` and ``haskeline`` library + libraries/file-io/file-io.cabal: Dependency of ``directory`` library + libraries/filepath/filepath.cabal: Dependency of ``ghc`` library + libraries/ghc-boot/ghc-boot.cabal: Internal compiler library + libraries/ghc-boot-th/ghc-boot-th.cabal: Internal compiler library + libraries/ghc-compact/ghc-compact.cabal: Core library + libraries/ghc-experimental/ghc-experimental.cabal: Core library + libraries/ghc-heap/ghc-heap.cabal: GHC heap-walking library + libraries/ghci/ghci.cabal: The REPL interface + libraries/ghc-internal/ghc-internal.cabal: Core library + libraries/ghc-platform/ghc-platform.cabal: Internal library + libraries/ghc-prim/ghc-prim.cabal: Core library + libraries/haskeline/haskeline.cabal: Dependency of ``ghci`` executable + libraries/hpc/hpc.cabal: Dependency of ``hpc`` executable + libraries/integer-gmp/integer-gmp.cabal: Core library + libraries/mtl/mtl.cabal: Dependency of ``Cabal`` library + libraries/os-string/os-string.cabal: Dependency of ``filepath`` library + libraries/parsec/parsec.cabal: Dependency of ``Cabal`` library + libraries/pretty/pretty.cabal: Dependency of ``ghc`` library + libraries/process/process.cabal: Dependency of ``ghc`` library + libraries/semaphore-compat/semaphore-compat.cabal: Dependency of ``ghc`` library + libraries/stm/stm.cabal: Dependency of ``haskeline`` library + libraries/template-haskell/template-haskell.cabal: Core library + libraries/terminfo/terminfo.cabal: Dependency of ``haskeline`` library + libraries/text/text.cabal: Dependency of ``Cabal`` library + libraries/time/time.cabal: Dependency of ``ghc`` library + libraries/transformers/transformers.cabal: Dependency of ``ghc`` library + libraries/unix/unix.cabal: Dependency of ``ghc`` library + libraries/Win32/Win32.cabal: Dependency of ``ghc`` library + libraries/xhtml/xhtml.cabal: Dependency of ``haddock`` executable + utils/haddock/haddock-api/haddock-api.cabal: Dependency of ``haddock`` executable + utils/haddock/haddock-library/haddock-library.cabal: Dependency of ``haddock`` executable ===================================== docs/users_guide/release-notes.rst ===================================== @@ -7,3 +7,4 @@ Release notes 9.12.1-notes 9.12.2-notes 9.12.3-notes + 9.12.4-notes ===================================== libraries/Win32 ===================================== @@ -1 +1 @@ -Subproject commit 027cbcf0de25d681823ea92fb545a2604c3a6a8b +Subproject commit 7d0772bb265a6c59eb14c441cf65c778895528df ===================================== libraries/base/base.cabal.in ===================================== @@ -4,7 +4,7 @@ cabal-version: 3.0 -- Make sure you are editing ghc-experimental.cabal.in, not ghc-experimental.cabal name: base -version: 4.21.1.0 +version: 4.21.2.0 -- NOTE: Don't forget to update ./changelog.md license: BSD-3-Clause ===================================== libraries/base/changelog.md ===================================== @@ -1,7 +1,9 @@ # Changelog for [`base` package](http://hackage.haskell.org/package/base) -## 4.21.2.0 *TBA* - * Evaluate backtraces for "error" exceptions at the moment they are thrown. ([CLC proposal #383](https://github.com/haskell/core-libraries-committee/issues/383)) +## 4.21.2.0 *March 2026* + * Expose `Backtraces` constructor and fields ([CLC proposal #199](https://github.com/haskell/core-libraries-committee/issues/199), [#26049](https://gitlab.haskell.org/ghc/ghc/-/issues/26049)) + * Store `StackTrace` and `StackSnapshot` in `Backtraces`, deferring decoding until display + * Evaluate backtraces for "error" exceptions at the moment they are thrown ([CLC proposal #383](https://github.com/haskell/core-libraries-committee/issues/383), [#26751](https://gitlab.haskell.org/ghc/ghc/-/issues/26751)) ## 4.21.1.0 *Sept 2024* * Fix incorrect results of `integerPowMod` when the base is 0 and the exponent is negative, and `integerRecipMod` when the modulus is zero ([#26017](https://gitlab.haskell.org/ghc/ghc/-/issues/26017)). ===================================== libraries/directory ===================================== @@ -1 +1 @@ -Subproject commit 005fa061171a55d35ce8dfe936cf3703525a8616 +Subproject commit 8c712e834f277544fc03e96dfbbb769126dc0a7c ===================================== libraries/exceptions ===================================== @@ -1 +1 @@ -Subproject commit b3a88ccc70acd7aa83be64235ab8c3ef1f08e96b +Subproject commit a3da039855479e3c8542e8b45986599d0414ff68 ===================================== libraries/file-io ===================================== @@ -1 +1 @@ -Subproject commit 21303160b5dd91d6197bd1d20a8796ba2a819d4e +Subproject commit 516e57977dfc031de5e00e8fc0bf5ab4cc6802f5 ===================================== libraries/filepath ===================================== @@ -1 +1 @@ -Subproject commit 65b0f8f31aac4a306135e27734988327f8eb1e6f +Subproject commit baac7d7e76449f76fc6785e77206edb5530b6bfb ===================================== libraries/haskeline ===================================== @@ -1 +1 @@ -Subproject commit 5f4bf62bf1f4846ad0b8d1fa9d45f902e3934511 +Subproject commit d0d8902f88fde549f76771feeb40f16941a22a9f ===================================== libraries/mtl ===================================== @@ -1 +1 @@ -Subproject commit 37cbd924cb71eba591a2e2b6b131767f632d22c9 +Subproject commit 4b5080f43cbc372a437d5fecb144c7b75aadd86b ===================================== libraries/os-string ===================================== @@ -1 +1 @@ -Subproject commit c08666bf7bf528e607fc1eacc20032ec59e69df3 +Subproject commit 71f66e1af2288867becaa567dfb10c1d791b0343 ===================================== libraries/unix ===================================== @@ -1 +1 @@ -Subproject commit 90e7d70de337ad759102b2445ebef6980684a9d3 +Subproject commit 60f432b76871bd7787df07dd3e2a567caba393f5 ===================================== testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs ===================================== @@ -322,7 +322,7 @@ module Control.Exception.Backtrace where type BacktraceMechanism :: * data BacktraceMechanism = CostCentreBacktrace | HasCallStackBacktrace | ExecutionBacktrace | IPEBacktrace type Backtraces :: * - data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe [GHC.Internal.ExecutionStack.Internal.Location], btrIpe :: GHC.Internal.Maybe.Maybe [GHC.Internal.Stack.CloneStack.StackEntry]} + data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot} collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Types.IO Backtraces displayBacktraces :: Backtraces -> GHC.Internal.Base.String getBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.IO GHC.Types.Bool ===================================== testsuite/tests/interface-stability/base-exports.stdout-mingw32 ===================================== @@ -322,7 +322,7 @@ module Control.Exception.Backtrace where type BacktraceMechanism :: * data BacktraceMechanism = CostCentreBacktrace | HasCallStackBacktrace | ExecutionBacktrace | IPEBacktrace type Backtraces :: * - data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe [GHC.Internal.ExecutionStack.Internal.Location], btrIpe :: GHC.Internal.Maybe.Maybe [GHC.Internal.Stack.CloneStack.StackEntry]} + data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot} collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Types.IO Backtraces displayBacktraces :: Backtraces -> GHC.Internal.Base.String getBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.IO GHC.Types.Bool ===================================== testsuite/tests/interface-stability/base-exports.stdout-ws-32 ===================================== @@ -322,7 +322,7 @@ module Control.Exception.Backtrace where type BacktraceMechanism :: * data BacktraceMechanism = CostCentreBacktrace | HasCallStackBacktrace | ExecutionBacktrace | IPEBacktrace type Backtraces :: * - data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe [GHC.Internal.ExecutionStack.Internal.Location], btrIpe :: GHC.Internal.Maybe.Maybe [GHC.Internal.Stack.CloneStack.StackEntry]} + data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot} collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Types.IO Backtraces displayBacktraces :: Backtraces -> GHC.Internal.Base.String getBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.IO GHC.Types.Bool ===================================== testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32 ===================================== @@ -4324,13 +4324,13 @@ module GHC.Exception.Backtrace.Experimental where data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot} type CollectExceptionAnnotationMechanism :: * data CollectExceptionAnnotationMechanism = ... - collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Internal.Types.IO Backtraces - collectExceptionAnnotation :: GHC.Internal.Stack.Types.HasCallStack => GHC.Internal.Types.IO GHC.Internal.Exception.Context.SomeExceptionAnnotation + collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Types.IO Backtraces + collectExceptionAnnotation :: GHC.Internal.Stack.Types.HasCallStack => GHC.Types.IO GHC.Internal.Exception.Context.SomeExceptionAnnotation displayBacktraces :: Backtraces -> GHC.Internal.Base.String - getBacktraceMechanismState :: BacktraceMechanism -> GHC.Internal.Types.IO GHC.Internal.Types.Bool - getCollectExceptionAnnotationMechanism :: GHC.Internal.Types.IO CollectExceptionAnnotationMechanism - setBacktraceMechanismState :: BacktraceMechanism -> GHC.Internal.Types.Bool -> GHC.Internal.Types.IO () - setCollectExceptionAnnotation :: forall a. GHC.Internal.Exception.Context.ExceptionAnnotation a => (GHC.Internal.Stack.Types.HasCallStack => GHC.Internal.Types.IO a) -> GHC.Internal.Types.IO () + getBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.IO GHC.Types.Bool + getCollectExceptionAnnotationMechanism :: GHC.Types.IO CollectExceptionAnnotationMechanism + setBacktraceMechanismState :: BacktraceMechanism -> GHC.Types.Bool -> GHC.Types.IO () + setCollectExceptionAnnotation :: forall a. GHC.Internal.Exception.Context.ExceptionAnnotation a => (GHC.Internal.Stack.Types.HasCallStack => GHC.Types.IO a) -> GHC.Types.IO () module GHC.PrimOps where -- Safety: Unsafe View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/a86f8f8d8a1f121bd0d49672efc6aa… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/a86f8f8d8a1f121bd0d49672efc6aa… You're receiving this email because of your account on gitlab.haskell.org.

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