Andreas Klebinger pushed to branch wip/andreask/linker_fix at Glasgow Haskell Compiler / GHC Commits: 58009c14 by Apoorv Ingle at 2026-04-02T09:51:24+01:00 Streamline expansions using HsExpansion (#25001) Notes added [Error Context Stack] [Typechecking by expansion: overview] Notes updated Note [Expanding HsDo with XXExprGhcRn] [tcApp: typechecking applications] ------------------------- Metric Decrease: T9020 ------------------------- There are 2 key changes: 1. `HsExpand` datatype mediates between expansions 2. Replace `ErrCtxtM` to a simpler `HsCtxt` that does not depend on a `TidyEnv` This has some consequences detailed below: 1. `HsExpand` datatype mediates between expansions * Simplifies the implementations of `tcExpr` to work on `XExpr` * Removes `VACtxt` (and its associated `VAExpansion` and `VACall`) datatype, it is subsumed by simply a `SrcSpan`. * Removes the function `addHeadCtxt` as it is now mearly setting a location * The function `tcValArgs` does its own argument number management * move `splitHsTypes` out of `tcApp` * Removes special case of tcBody from `tcLambdaMatches` * Removes special case of `dsExpr` for `ExpandedThingTc` * Renames `tcMonoExpr` -> `tcMonoLExpr`, `tcMonoExprNC` -> `tcMonoLExpr` * Renames `EValArg`, `EValArgQL` fields: `ea_ctxt` -> `ea_loc_span` and `eaql_ctx` -> `eaql_loc_span` * Remove `PopErrCtxt` from `XXExprGhcRn` * `fun_orig` in tcInstFun depends on the SrcSpan of the head of the application chain (similar to addArgCtxt) - it references the application chain head if it is user located, or uses the error context stack as a fallback if it's a generated location * Make a new variant `GeneratedSrcSpan` in `SrcSpan` for HIEAst Nodes - Expressions wrapped around `GeneratedSrcSpan` are ignored and never added to the error context stack - In Explicit list expansion `fromListN` is wrapped with a `GeneratedSrcSpan` with `GeneratedSrcSpanDetails` field to store the original srcspan 2. Replace `ErrCtxtM` to a simpler `HsCtxt` that does not depend on a `TidyEnv` * Merge `HsThingRn` to `HsCtxt` * Landmark Error messages are now just computed on the fly * Make HsExpandedRn and HsExpandedTc payload a located HsExpr GhcRn * `HsCtxt` are tidied and zonked at the end right before printing Co-authored-by: simonpj <simon.peytonjones@gmail.com> - - - - - bc4b4487 by Zubin Duggal at 2026-04-03T14:22:27-04:00 driver: recognise .dyn_o as a valid object file to link if passed on the command line. This allows plugins compiled with this suffix to run. Fixes #24486 - - - - - 5ebb9121 by Simon Jakobi at 2026-04-03T14:23:11-04:00 Add regression test for #16145 Closes #16145. - - - - - c1fc1c44 by Simon Peyton Jones at 2026-04-03T19:56:07-04:00 Refactor eta-expansion in Prep The Prep pass does eta-expansion but I found cases where it was doing bad things. So I refactored and simplified it quite a bit. In the new design * There is no distinction between `rhs` and `body`; in particular, lambdas can now appear anywhere, rather than just as the RHS of a let-binding. * This change led to a significant simplification of Prep, and a more straightforward explanation of eta-expansion. See the new Note [Eta expansion] * The consequences is that CoreToStg needs to handle naked lambdas. This is very easy; but it does need a unique supply, which forces some simple refactoring. Having a unique supply to hand is probably a good thing anyway. - - - - - 21beda2c by Simon Peyton Jones at 2026-04-03T19:56:07-04:00 Clarify Note [Interesting dictionary arguments] Ticket #26831 ended up concluding that the code for GHC.Core.Opt.Specialise.interestingDict was good, but the commments were a bit inadequate. This commit improves the comments slightly. - - - - - 3eaac1f2 by Simon Peyton Jones at 2026-04-03T19:56:07-04:00 Make inlining a bit more eager for overloaded functions If we have f d = ... (class-op d x y) ... we should be eager to inline `f`, because that may change the higher order call (class-op d x y) into a call to a statically known function. See the discussion on #26831. Even though this does a bit /more/ inlining, compile times decrease by an average of 0.4%. Compile time changes: DsIncompleteRecSel3(normal) 431,786,104 -2.2% ManyAlternatives(normal) 670,883,768 -1.6% ManyConstructors(normal) 3,758,493,832 -2.6% GOOD MultilineStringsPerf(normal) 29,900,576 -2.8% T14052Type(ghci) 1,047,600,848 -1.2% T17836(normal) 392,852,328 -5.2% T18478(normal) 442,785,768 -1.4% T21839c(normal) 341,536,992 -14.1% GOOD T3064(normal) 174,086,152 +5.3% BAD T5631(normal) 506,867,800 +1.0% hard_hole_fits(normal) 209,530,736 -1.3% info_table_map_perf(normal) 19,523,093,184 -1.2% parsing001(normal) 377,810,528 -1.1% pmcOrPats(normal) 60,075,264 -0.5% geo. mean -0.4% minimum -14.1% maximum +5.3% Runtime changes haddock.Cabal(normal) 27,351,988,792 -0.7% haddock.base(normal) 26,997,212,560 -0.6% haddock.compiler(normal) 219,531,332,960 -1.0% Metric Decrease: LinkableUsage01 ManyConstructors T17949 T21839c T13035 TcPlugin_RewritePerf hard_hole_fits Metric Increase: T3064 - - - - - 5cbc2c82 by Matthew Pickering at 2026-04-03T19:57:02-04:00 bytecode: Add magic header/version to bytecode files In order to avoid confusing errors when using stale interface files (ie from an older compiler version), we add a simple header/version check like the one for interface files. Fixes #27068 - - - - - d95a1936 by fendor at 2026-04-03T19:57:02-04:00 Add constants for bytecode in-memory buffer size Introduce a common constant for the default size of the .gbc and .bytecodelib binary buffer. The buffer is by default set to 1 MB. - - - - - b822c30a by mangoiv at 2026-04-03T19:57:49-04:00 testsuite: filter stderr for static001 on darwin This reactivates the test on x86_64 darwin as this should have been done long ago and ignores warnings emitted by ranlib on newer version of the darwin toolchain since they are benign. (no symbols for stub libraries) Fixes #27116 - - - - - 28ce1f8a by Andreas Klebinger at 2026-04-03T19:58:44-04:00 Give the Data instance for ModuleName a non-bottom toConstr implementation. I've also taken the liberty to add Note [Data.Data instances for GHC AST Types] describing some of the uses of Data.Data I could find. Fixes #27129 - - - - - 8ca41ffe by mangoiv at 2026-04-03T19:59:30-04:00 issue template: fix add bug label - - - - - 3981db0c by Sylvain Henry at 2026-04-03T20:00:33-04:00 Add more canned GC functions for common register patterns (#27142) Based on analysis of heap-check sites across the GHC compiler and Cabal, the following patterns were not covered by existing canned GC functions but occurred frequently enough to warrant specialisation: stg_gc_ppppp -- 5 GC pointers stg_gc_ip -- unboxed word + GC pointer stg_gc_pi -- GC pointer + unboxed word stg_gc_ii -- two unboxed words stg_gc_bpp -- byte (I8) + two GC pointers Adding these reduces the fraction of heap-check sites falling back to the generic GC path from ~1.4% to ~0.4% when compiling GHC itself. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> - - - - - d17d1435 by Matthew Pickering at 2026-04-03T20:01:19-04:00 Make home unit dependencies stored as sets Co-authored-by: Wolfgang Jeltsch <wolfgang@well-typed.com> - - - - - 92a97015 by Simon Peyton Jones at 2026-04-05T00:58:57+01:00 Add Invariant (NoTypeShadowing) to Core This commit addresses #26868, by adding a new invariant (NoTypeShadowing) to Core. See Note [No type-shadowing in Core] in GHC.Core - - - - - 8b5a5020 by Simon Peyton Jones at 2026-04-05T00:58:57+01:00 Major refactor of free-variable functions For some time we have had two free-variable mechanims for types: * The "FV" mechanism, embodied in GHC.Utils.FV, which worked OK, but was fragile where eta-expansion was concerned. * The TyCoFolder mechanism, using a one-shot EndoOS accumulator I finally got tired of this and refactored the whole thing, thereby addressing #27080. Now we have * `GHC.Types.Var.FV`, which has a composable free-variable result type, very much in the spirit of the old `FV`, but much more robust. (It uses the "one shot trick".) * GHC.Core.TyCo.FVs now has just one technology for free variables. All this led to a lot of renaming. There are couple of error-message changes. The change in T18451 makes an already-poor error message even more mysterious. But it really needs a separate look. We also now traverse the AST in a different order leading to a different but still deterministic order for FVs and test output has been adjusted accordingly. - - - - - 4bf040c6 by sheaf at 2026-04-05T14:56:29-04:00 Add utility pprTrace_ function This function is useful for quick debugging, as it can be added to a where clause to pretty-print debugging information: fooBar x y | cond = body1 | otherwise = body2 where !_ = pprTrace_ "fooBar" $ vcat [ text "x:" <+> ppr x , text "y:" <+> ppr y , text "cond:" <+> ppr cond ] - - - - - 502e6ffe by Andrew Lelechenko at 2026-04-07T04:47:21-04:00 base: improve error message for Data.Char.chr As per https://github.com/haskell/core-libraries-committee/issues/384 - - - - - b21bd52e by Simon Peyton Jones at 2026-04-07T04:48:07-04:00 Refactor FunResCtxt a bit Fixes #27154 - - - - - 7fe84ea5 by Zubin Duggal at 2026-04-07T19:11:52+05:30 compiler: Warn when -finfo-table-map is used with -fllvm These are currently not supported together. Fixes #26435 - - - - - 4a45a7da by Matthew Pickering at 2026-04-08T04:37:29-04:00 packaging: correctly propagate build/host/target to bindist configure script At the moment the host and target which we will produce a compiler for is fixed at the initial configure time. Therefore we need to persist the choice made at this time into the installation bindist as well so we look for the right tools, with the right prefixes at install time. In the future, we want to provide a bit more control about what kind of bindist we produce so the logic about what the host/target will have to be written by hadrian rather than persisted by the configure script. In particular with cross compilers we want to either build a normal stage 2 cross bindist or a stage 3 bindist, which creates a bindist which has a native compiler for the target platform. Fixes #21970 Co-authored-by: Sven Tennie <sven.tennie@gmail.com> - - - - - b0950df6 by Sven Tennie at 2026-04-08T04:37:29-04:00 Cross --host and --target no longer required for cross (#21970) We set sane defaults in the configure script. Thus, these paramenters aren't required any longer. - - - - - fef35216 by Sven Tennie at 2026-04-08T04:37:30-04:00 ci: Define USER_CONF_CC_OPTS_STAGE2 for aarch64/mingw ghc-toolchain doesn't see $CONF_CC_OPTS_STAGE2 when the bindist gets configured. So, the hack to override the compiler gets lost. - - - - - 8dd6f453 by Cheng Shao at 2026-04-08T04:38:11-04:00 ghci: use ShortByteString for LookupSymbol/LookupSymbolInDLL/LookupClosure messages This patch refactors ghci to use `ShortByteString` for `LookupSymbol`/`LookupSymbolInDLL`/`LookupClosure` messages as the first part of #27147. Co-authored-by: Codex <codex@openai.com> - - - - - 371ef200 by Cheng Shao at 2026-04-08T04:38:11-04:00 ghci: use ShortByteString for MkCostCentres message This patch refactors ghci to use `ShortByteString` for `MkCostCentres` messages as a first part of #27147. This also considerably lowers the memory overhead of breakpoints when cost center profiling is enabled. ------------------------- Metric Decrease: interpreter_steplocal ------------------------- Co-authored-by: Codex <codex@openai.com> - - - - - 4a122bb6 by Phil Hazelden at 2026-04-08T20:49:42-04:00 Implement modifiers syntax. The `%m` syntax of linear types is now accepted in more places, to allow use by future extensions, though so far linear types is still the only consumer. This may break existing code where it * Uses -XLinearTypes. * Has code of the form `a %m -> b`, where `m` can't be inferred to be kind Multiplicity. The code can be fixed either by adding a kind annotation, or by setting `-XLinearTypes -XNoModifiers`. Proposal: https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0370-mo... - - - - - 07267f79 by Zubin Duggal at 2026-04-08T20:50:25-04:00 hadrian: Don't include the package hash in the haddock directory Since GHC 9.8 and hash_unit_ids, haddock urls have looked like`ghc-9.10.3/doc/html/libraries/base-4.20.2.0-39f9/**/*.html` The inclusion of the hash makes it hard for downstream non-boot packages to properly link to these files, as the hash is not part of a standard cabal substitution. Since we only build one version of each package, we don't need the hash to disambiguate anything, we can just remove it. Fixes #26635 - - - - - 0a83b95b by ARATA Mizuki at 2026-04-08T20:51:18-04:00 testsuite: Allow multiple ways to be run by setting multiple command-line options This patch allows multiple `--test-way`s to take effect, like: $ hadrian/build test --test-way=normal --test-way=llvm Previously, only one way was run if the test speed was 'normal' or 'fast'. Closes #26926 Co-authored-by: sheaf <sam.derbyshire@gmail.com> - - - - - e841931c by Teo Camarasu at 2026-04-08T20:52:00-04:00 doc: improve eventlog-flush-interval flag documentation We mention the performance cost and how this flag can be turned off. Resolves #27056 - - - - - e332db25 by Teo Camarasu at 2026-04-08T20:52:01-04:00 docs/user_guide: fix typo - - - - - 5b82080a by Simon Jakobi at 2026-04-08T20:52:44-04:00 Fix -dsuppress-uniques for free variables in demand signatures Before: Str=b{sXyZ->S} With this patch: Str=b{S} T13143.stderr is updated accordingly. Fixes #27106. - - - - - b7a084cc by Simon Jakobi at 2026-04-08T20:53:27-04:00 Documentation fixes for demand signature notation Fixes #27115. - - - - - 59391132 by Simon Jakobi at 2026-04-08T20:54:08-04:00 Use upsert for non-deleting map updates Some compiler functions were using `alter`, despite never removing any entries: they only update an existing entry or insert a new one. These functions are converted to using `upsert`: alter :: (Maybe a -> Maybe a) -> Key -> Map a -> Map a upsert :: (Maybe a -> a) -> Key -> Map a -> Map a `upsert` variants are also added to APIs of the various Word64Map wrapper types. The precedent for this `upsert` operation is in the containers library: see https://github.com/haskell/containers/pull/1145 Metrics: compile_time/bytes allocated ------------------------------------- geo. mean: -0.1% minimum: -0.5% maximum: +0.0% Resolves #27140. - - - - - da7e82f4 by Cheng Shao at 2026-04-08T20:54:49-04:00 testsuite: fix testsuite run for +ipe again This patch makes the +ipe flavour transformer pass the entire testsuite again by dropping stdout/stderr checks of certain tests that are sensitive to stack layout changes with `+ipe`. Related: #26799. - - - - - b135a87d by Zubin Duggal at 2026-04-09T19:36:50+05:30 Bump directory submodule to 1.3.11.0 (unreleased) - - - - - 3a291d07 by Zubin Duggal at 2026-04-09T19:36:50+05:30 Bump file-io submodule to 0.2.0 - - - - - e0ab606d by Zubin Duggal at 2026-04-10T18:40:20+05:30 Release notes for GHC 10.0 - - - - - e08b9b34 by Zubin Duggal at 2026-04-10T18:40:20+05:30 Bump ghc-prim version to 0.14.0 - - - - - a92aac6e by Zubin Duggal at 2026-04-10T18:40:20+05:30 Bump template-haskell to 2.25.0.0; update submodule exceptions for TH 2.25 - - - - - f254d9e8 by Zubin Duggal at 2026-04-10T18:40:20+05:30 Bump GHC version to 10.0 - - - - - 6ce0368a by Zubin Duggal at 2026-04-10T18:40:28+05:30 Bump base to 4.23.0.0; update submodules for base 4.24 upper bound - - - - - 702fb8a5 by Zubin Duggal at 2026-04-10T18:40:28+05:30 Bump GHC version to 10.1; update submodules template-haskell-lift and template-haskell-quasiquoter for ghc-internal 10.200 - - - - - 75df1ca4 by Zubin Duggal at 2026-04-10T18:40:28+05:30 Use changelog.d for release notes (#26002) GHC now uses a fragment-based changelog workflow using a custom script adapted from https://codeberg.org/fgaz/changelog-d. Contributors add a file in changelog.d/ for each user-facing change. At release time, these are assembled into release notes for sphinx (in RST) format, using the tool. New hadrian `changelog` target to generate changelogs CI job to validate changelog entries for MRs unless skipped with ~"no-changelog" label Teach sphinx about ghc-mr: extlink to link to MRs Remove `ghc-package-list` from sphinx, and implement it in changelog-d instead (Fixes #26476). (cherry picked from commit 989c07249978f418dfde1353abfad453f024d61a) - - - - - 585d7450 by Luite Stegeman at 2026-04-11T02:17:13-04:00 tc: discard warnings in tcUserStmt Plan C We typecheck let_stmt twice, but we don't want the warnings twice! see #26233 - - - - - 2df604e9 by Sylvain Henry at 2026-04-11T02:19:30-04:00 Introduce TargetInt to represent target's Int (#15973) GHC was using host 'Int' in several places to represent values that live in the target machine's 'Int' type. This is silently wrong when cross-compiling from a 32-bit host to a 64-bit target: the host Int is 32 bits while the target Int is 64 bits. See Note [TargetInt] in GHC.Platform. Also used the opportunity to make DynTag = Word8. Fixes #15973 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> - - - - - d419e972 by Luite Stegeman at 2026-04-13T15:16:04-04:00 Suppress desugaring warnings in the pattern match checker Avoid duplicating warnings from the actual desugaring pass. fixes #25996 - - - - - c5b80dd0 by Phil de Joux at 2026-04-13T15:16:51-04:00 Typo ~/ghc/arch-os-version/environments - - - - - 71462fff by Luite Stegeman at 2026-04-13T15:17:38-04:00 add changelog entry for #26233 - - - - - d1ddfd4b by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00 Add test for #25636 The existing test behaviour of "T23146_liftedeq" changed because the simplifier now does a bit more inlining. We can restore the previous bad behavior by using an OPAQUE pragma. This test doubles as a test for #25636 when run in ghci, so we add it as such. - - - - - b9df40ee by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00 refactor: protoBCOName is always a Name Simplifies the code by removing the unnecessary type argument to ProtoBCO which was always 'Name' - - - - - 5c2a179e by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00 Allocate static constructors for bytecode This commit adds support for static constructors when compiling and linking ByteCode objects. Top-level StgRhsCon get lowered to ProtoStaticCons rather than to ProtoBCOs. A ProtoStaticCon gets allocated directly as a data con application on the heap (using the new primop newConApp#). Previously, we would allocate a ProtoBCO which, when evaluated, would PACK and return the constructor. A few more details are given in Note [Static constructors in Bytecode]. Secondly, this commit also fixes issue #25636 which was caused by linking *unlifted* constructors in BCO instructions as - (1) a thunk indexing the array of BCOs in a module - (2) which evaluated to a BCO which still had to be evaluated to return the unlifted constructor proper. The (2) issue has been resolved by allocating the static constructors directly. The (1) issue can be resolved by ensuring that we allocate all unlifted top-level constructors eagerly, and leave the knot-tying for the lifted BCOs and top-level constructors only. The top-level unlifted constructors are never mutually recursive, so we can allocate them all in one go as long as we do it in topological order. Lifted fields of unlifted constructors can still be filled by the knot-tied lifted variables since in those fields it is fine to keep those thunks. See Note [Tying the knot in createBCOs] for more details. Fixes #25636 ------------------------- Metric Decrease: LinkableUsage01 ------------------------- - - - - - cde47053 by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00 Revert "StgToByteCode: Assert that PUSH_G'd values are lifted" This reverts commit ec26c54d818e0cd328276196930313f66b780905. Ever since f7a22c0f4e9ae0dc767115d4c53fddbd8372b777, we now do support and will link top-level unlifted constructors into evaluated and properly tagged values which we can reference with PUSH_G. This assertion is no longer true and triggered a failure in T25636 - - - - - c7a7e5b8 by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00 refactor: Tag more remote Ptrs as RemotePtr Pure refactor which improves the API of - GHC.ByteCode.Linker - GHC.Runtime.Interpreter - GHC.Runtime.Interpreter.Types.SymbolCache by using `RemotePtr` for more functions which used to return `Ptr`s that could potentially be in a foreign process. E.g. `lookupIE`, `lookupStaticPtr`, etc... - - - - - fc59494c by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00 Add float# and subword tests for #25636 These tests cover that static constructors in bytecode work correctly for Float# and subword values (Word8#, Word16#) - - - - - 477f521b by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00 test: Validate topoSort logic in createBCOs This test validates that the topological sorting and ordering of the unlifted constructors and lifted constructors in `createBCOs` is correct. See `Note [Tying the knot in createBCOs]` for why tying the knot for the created BCOs is slightly difficult and why the topological sorting is necessary. This test fails when `let topoSortedObjs = topSortObjs objs` is substituted by `let topoSortedObjs = zip [0..] objs`, thus witnessing the toposort logic is correct and necessary. The test calls the ghci `createBCOs` directly because it is currently impossible to construct in Source Haskell a situation where a top-level static unlifted constructor depends on another (we don't have top-level unlifted constructors except for nullary constructors like `Leaf :: (UTree :: UnliftedType)`). This is another test for fix for #25636 - - - - - 2d9c30be by Simon Jakobi at 2026-04-14T18:42:00-04:00 Improve tests for `elem` ...in order to simplify the work on #27096. * Improve T17752 by including the Core output in golden files, checking both -O1 and -O2. * Add tests for fusion and no-fusion cases. Fixes #27101. - - - - - 2dadf3b0 by sheaf at 2026-04-16T13:28:39-04:00 Simplify mkTick This commit simplifies 'GHC.Core.Utils.mkTick', removing the accumulating parameter 'rest' which was suspiciously treating a bunch of different ticks as a group, and moving the group as a whole around the AST, ignoring that the ticks in the group might have different placement properties. The most important change is that we revert the logic (added in 85b0aae2) that allowed ticks to be placed around coercions, which caused serious issues (e.g. #27121). It was just a mistake, as it doesn't make sense to put a tick around a coercion. Also adds Note [Pushing SCCs inwards] which clarifies the logic for pushing SCCs into lambdas, constructor applications, and dropping SCCs around non-function variables (in particular the treatment of splittable ticks). A few other changes are also implemented: - simplify 'can_split' predicate (no functional change) - combine profiling ticks into one when possible Fixes #26878, #26941 and #27121 Co-authored-by: simonpj <simon.peytonjones@gmail.com> - - - - - a0d6f1f4 by Simon Jakobi at 2026-04-16T13:29:28-04:00 Add regression test for #9074 Closes #9074. - - - - - d178ee89 by Sylvain Henry at 2026-04-16T13:30:25-04:00 Add changelog for #15973 - - - - - e8a196c6 by sheaf at 2026-04-16T13:31:19-04:00 Deal with 'noSpec' in 'coreExprToPmLit' This commit makes two separate changes relating to 'GHC.HsToCore.Pmc.Solver.Types.coreExprAsPmLit': 1. Commit 7124e4ad mistakenly marked deferred errors as non-canonical, which led to the introduction of 'nospec' wrappers in the generated Core. This reverts that accident by declaring deferred errors as being canonical, avoiding spurious 'nospec' wrapping. 2. Look through magic identity-like Ids such as 'nospec', 'inline' and 'lazy' in 'coreExprAsPmLit', just like Core Prep does. There might genuinely be incoherent evidence, but that shouldn't obstruct the pattern match checker. See test T27124a. Fixes #25926 #27124 ------------------------- Metric Decrease: T3294 ------------------------- - - - - - 8cb99552 by Sylvain Henry at 2026-04-16T19:22:43-04:00 hadrian: warn when package index is missing (#16484) Since cabal-install 3.0 we can query the path of remote-repo-cache and check if hackage package index is present. Fixes #16484 - - - - - d6ce7477 by Richard Eisenberg at 2026-04-16T19:23:25-04:00 Teach hadrian to --skip-test. Fixes #27188. This adds the --skip-test flag to `hadrian build`, as documented in the patch. - - - - - 717b8112 by Andreas Klebinger at 2026-04-17T14:46:32+02:00 rts: LoadArchive/LoadObj - refactor/improvements: Properly handle AArch64 COFF bigobj files by relying on the PE-linker specific object identification rather doing adhoc magic number checks. Rather than doing adhoc magic number checking in odd places we know always call verifyAndInitOc on ObjectCode which does those checks in one place. We now properly recognize all of the MachO index sections (__SYMDEF*). Drop the MAchoMisalignment business. It's not needed we align individual sections when loading them. Clean up the windows Importlib detection logic a bit. Fixes #26231 - - - - - 617 changed files: - .gitlab-ci.yml - .gitlab/ci.sh - .gitlab/generate-ci/gen_ci.hs - .gitlab/issue_templates/default.md - .gitlab/issue_templates/release_tracking.md - .gitlab/jobs.yaml - .gitlab/merge_request_templates/Default.md - + changelog.d/T15973 - + changelog.d/T25636 - + changelog.d/T27121.md - + changelog.d/T27124.md - + changelog.d/changelog-entries - + changelog.d/config - + changelog.d/fix-duplicate-pmc-warnings - + changelog.d/fix-ghci-duplicate-warnings-26233 - + changelog.d/hadrian-warn-missing-package-index-16484 - + changelog.d/rts-loader-refactor.md - + changelog.d/skip-test - compiler/GHC.hs - compiler/GHC/Builtin/PrimOps.hs - compiler/GHC/Builtin/primops.txt.pp - compiler/GHC/ByteCode/Asm.hs - compiler/GHC/ByteCode/Binary.hs - compiler/GHC/ByteCode/Breakpoints.hs - compiler/GHC/ByteCode/InfoTable.hs - compiler/GHC/ByteCode/Instr.hs - compiler/GHC/ByteCode/Linker.hs - compiler/GHC/ByteCode/Serialize.hs - compiler/GHC/ByteCode/Types.hs - compiler/GHC/Cmm/CommonBlockElim.hs - 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+ utils/changelog-d/LICENSE - + utils/changelog-d/README.md - + utils/changelog-d/changelog-d.cabal - utils/check-exact/ExactPrint.hs - utils/check-exact/Main.hs - utils/check-exact/Parsers.hs - utils/check-exact/Transform.hs - utils/check-exact/Utils.hs - utils/deriveConstants/Main.hs - utils/haddock/haddock-api/haddock-api.cabal - utils/haddock/haddock-api/src/Haddock/Backends/Hoogle.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/Backends/Xhtml/Utils.hs - utils/haddock/haddock-api/src/Haddock/Convert.hs - utils/haddock/haddock-api/src/Haddock/GhcUtils.hs - utils/haddock/haddock-api/src/Haddock/Interface/Create.hs - utils/haddock/haddock-api/src/Haddock/Interface/Rename.hs - utils/haddock/haddock-api/src/Haddock/Interface/RenameType.hs - utils/haddock/haddock-api/src/Haddock/InterfaceFile.hs - utils/haddock/haddock-api/src/Haddock/Types.hs - utils/haddock/haddock-library/haddock-library.cabal - utils/haddock/haddock-test/haddock-test.cabal - utils/haddock/haddock.cabal - utils/haddock/html-test/src/LinearTypes.hs - utils/haddock/latex-test/src/LinearTypes/LinearTypes.hs - utils/hsc2hs - utils/jsffi/dyld.mjs The diff was not included because it is too large. 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