Simon Jakobi pushed to branch wip/sjakobi/T26964 at Glasgow Haskell Compiler / GHC Commits: f2f5c6ba by Nikita Efremov at 2026-06-02T16:04:54+00:00 fix typo : compete with performance, not complete - - - - - 5524ea0e by Wolfgang Jeltsch at 2026-06-03T08:01:26-04:00 Make the current `base` buildable with GHC 9.14 This comprises the following changes: * Disable some imports into `GHC.Base` for GHC 9.14 * Disable some imports into `Prelude` for GHC 9.14 * Disable separate `ArrowLoop` import for GHC 9.14 * Disable `GHC.Internal.STM` import for GHC 9.14 * Disable `GHC.Internal.Unicode.Version` import for GHC 9.14 * Disable `GHC.Internal.TH.Monad` import for GHC 9.14 * Add alternative `fixIO` import for GHC 9.14 * Add alternative `unsafeCodeCoerce` import for GHC 9.14 * Disable hiding of imported SIMD operations for GHC 9.14 * Disable use of GHC 9.14’s `printToHandleFinalizerExceptionHandler` * Enable use of `getFileHash` from `ghc-internal` for GHC 9.14 * Make `thenA` available for GHC 9.14 * Make `thenM` available for GHC 9.14 * Disable translation of `IoManagerFlagPoll` for GHC 9.14 * Add `hGetNewlineMode` for GHC 9.14 - - - - - d3438055 by Enrico Maria De Angelis at 2026-06-03T08:02:17-04:00 Fix #27067 - Clarify haddocks on `minusNaturalMaybe` - - - - - f9bcfac2 by sheaf at 2026-06-03T14:47:19-04:00 Avoid mkTick in Core Prep breaking ANF As discovered in #27182, mkTick can break ANF. This patch introduces a variant of mkTick that skips the single optimisation that could break ANF. This is preferrable over switching to the raw Tick constructor, as the latter may introduce spurious cost centres in profiling reports. This is a temporary measure until we more thoroughly refactor how mkTick works (see #27141). See Note [mkTick breaks ANF] in GHC.CoreToStg.Prep. Fixes #27182 - - - - - cf1fd661 by Artem Pelenitsyn at 2026-06-03T14:48:09-04:00 clarify comment for getSizeofMutableByteArray#: we get the size in bytes, not "elements" - - - - - a3b431f3 by David Eichmann at 2026-06-04T10:10:19+00:00 Hadrian: convert env variable ACLOCAL_PATH to unix paths. Convert ACLOCAL_PATH to a unix style path when invoking autoreconf. Autoreconf doesn't handle windows paths. See Note [Autoreconf unix paths from ACLOCAL_PATH]. Fixes #27311 - - - - - 18f6138a by Simon Jakobi at 2026-06-04T20:20:31-04:00 testsuite: Deduplicate --only test names config.only is assumed to be a set, but supplying --only overwrote it with the (list) argparse result, which can contain duplicates. When a test ran, config.only.remove(name) dropped only the first occurrence, so a duplicated name lingered and was later misreported as a "test not found" framework failure. Store it as a set instead. Fixes #27322 Co-Authored-By: Claude Opus 4.7 - - - - - 2f3cc9ff by Simon Jakobi at 2026-06-08T07:55:49-04:00 testsuite: detect fast bignum via ghc-internal, not removed ghc-bignum The ghc-bignum package was merged into ghc-internal, so the BIGNUM_GMP probe in test.mk ran `ghc-pkg field ghc-bignum exposed-modules`, which fails with "cannot find package ghc-bignum". That error went to stderr and leaked into the captured stderr of every makefile_test, causing spurious [bad stderr] failures across the suite. The probe also silently returned empty, so config.have_fast_bignum was wrongly False even on GMP builds. Probe ghc-internal's extra-libraries for the gmp library instead: the GMP backend module is an other-module (not exposed), but GMP_LIBS adds gmp to extra-libraries only on a GMP build, so this distinguishes the backends. Redirect stderr to keep any future missing-package error off the harness's stderr. This also removes a stale comment as per suggestion from hsyl20. Co-Authored-By: Claude Opus 4.7 - - - - - eb3bf6e7 by Alan Zimmerman at 2026-06-08T07:56:32-04:00 EPA: Rename Transform.anchorEof to addModuleCommentOrigDeltas This now matches what it actually does. - - - - - a9bbd128 by Simon Jakobi at 2026-06-09T11:11:31+02:00 Improve -fcheck-prim-bounds error messages When an array access instrumented by -fcheck-prim-bounds fails at runtime, report the failing primop, the offending index, the array size, and the module being compiled, then exit with a normal failure status, e.g. readSmallArray#: array access out of bounds in module Main: index -1 is not within [0, 5). Previously the program aborted via barf with an "internal error" framed as a GHC bug, even though such failures are almost always caused by incorrect use of unsafe primops in user or library code. The primop and module names are threaded to the RTS failure handlers (rtsOutOfBoundsAccess, rtsMemcpyRangeOverlap) from StgToCmm. The primop name is stashed once in cmmPrimOpApp via a new fcs_prim_op field in FCodeState, so the bounds-check sites are unchanged; the module is stgToCmmThisModule. Fixes #26964, #24617. Co-Authored-By: Claude Opus 4.8 - - - - - 48 changed files: - boot - + changelog.d/T27182.md - + changelog.d/improve-check-prim-bounds-messages - compiler/GHC/Builtin/primops.txt.pp - compiler/GHC/Core/Utils.hs - compiler/GHC/CoreToStg/Prep.hs - compiler/GHC/StgToCmm/Monad.hs - compiler/GHC/StgToCmm/Prim.hs - docs/users_guide/debugging.rst - docs/users_guide/javascript.rst - hadrian/src/Hadrian/Oracles/Path.hs - hadrian/src/Rules/BinaryDist.hs - libraries/base/src/Control/Applicative.hs - libraries/base/src/Control/Arrow.hs - libraries/base/src/Control/Monad.hs - libraries/base/src/Data/Array/Byte.hs - libraries/base/src/Data/Fixed.hs - libraries/base/src/GHC/Base.hs - libraries/base/src/GHC/Conc.hs - libraries/base/src/GHC/Conc/Sync.hs - libraries/base/src/GHC/Exts.hs - libraries/base/src/GHC/Fingerprint.hs - libraries/base/src/GHC/IO/Handle.hs - libraries/base/src/GHC/RTS/Flags.hs - libraries/base/src/GHC/Unicode.hs - libraries/base/src/GHC/Weak.hs - libraries/base/src/GHC/Weak/Finalize.hs - libraries/base/src/Prelude.hs - libraries/base/src/System/IO.hs - libraries/base/src/System/Mem/Weak.hs - libraries/ghc-internal/src/GHC/Internal/Natural.hs - rts/PrimOps.cmm - rts/RtsMessages.c - rts/include/rts/Messages.h - testsuite/driver/runtests.py - testsuite/mk/test.mk - + testsuite/tests/codeGen/should_fail/T26964.hs - + testsuite/tests/codeGen/should_fail/T26964.stderr - + testsuite/tests/codeGen/should_fail/T26964Module.hs - + testsuite/tests/codeGen/should_fail/T26964Module.stderr - + testsuite/tests/codeGen/should_fail/T26964ModuleA.hs - + testsuite/tests/codeGen/should_fail/T26964b.hs - + testsuite/tests/codeGen/should_fail/T26964b.stderr - testsuite/tests/codeGen/should_fail/all.T - + testsuite/tests/profiling/should_compile/T27182.hs - testsuite/tests/profiling/should_compile/all.T - utils/check-exact/Main.hs - utils/check-exact/Transform.hs The diff was not included because it is too large. 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