Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC Commits: 4a186d26 by Wolfgang Jeltsch at 2026-03-04T19:47:10-05:00 Correct `hIsReadable` and `hIsWritable` for duplex handles This contribution implements CLC proposal #371. It changes `hIsReadable` and `hIsWritable` such that they always throw a respective exception when encountering a closed or semi-closed handle, not just in the case of a file handle. - - - - - a297f9c7 by Wolfgang Jeltsch at 2026-03-04T19:47:10-05:00 Document `SemiClosedHandle` - - - - - e7ee773c by Wolfgang Jeltsch at 2026-03-04T19:47:10-05:00 Tell users what “semi-closed” means for duplex handles - - - - - 128689e0 by Cheng Shao at 2026-03-04T19:47:13-05:00 compiler: add myCapabilityExpr to GHC.Cmm.Utils This commit adds `myCapabilityExpr` to `GHC.Cmm.Utils` which is computed from `BaseReg`. It's convenient for codegen logic where one needs to pass the current Capability's pointer. - - - - - 31a52893 by Cheng Shao at 2026-03-04T19:47:13-05:00 compiler: lower tryPutMVar# into a ccall directly This patch addresses an old TODO of `stg_tryPutMVarzh` by removing it completely and making the compiler lower `tryPutMVar#` into a ccall to `performTryPutMVar` directly, without landing into an intermediate C or Cmm function. `performTryPutMVar` is promoted to a public RTS function with default visibility, and the compiler lowering logic takes into account the C ABI of `performTryPutMVar` and converts from C Bool to primop's `Int#` result properly. - - - - - f3c99a09 by Ilias Tsitsimpis at 2026-03-04T19:47:17-05:00 Fix determinism of linker arguments The switch from Data.Map to UniqMap in 3b5be05ac29 introduced non-determinism in the order of packages passed to the linker. This resulted in non-reproducible builds where the DT_NEEDED entries in dynamic libraries were ordered differently across builds. Fix the regression by explicitly sorting the package list derived from UniqMap. Fixes #26838 - - - - - d9df35f2 by Matthew Pickering at 2026-03-04T19:47:18-05:00 determinism: Use a deterministic renaming when writing bytecode files Now when writing the bytecode file, a counter and substitution are used to provide deterministic keys to local variables (rather than relying on uniques). This change ensures that `.gbc` are produced deterministically. Fixes #26499 - - - - - 4b1a53d4 by Teo Camarasu at 2026-03-04T19:47:20-05:00 ghc-internal: delete Version hs-boot loop Version has a Read instance which needs Unicode but part of the Unicode interface is the unicode version. This is easy to resolve. We simply don't re-export the version from the Unicode module. Resolves #26940 - - - - - a1e71623 by Sylvain Henry at 2026-03-04T19:47:48-05:00 Linker: implement support for COMMON symbols (#6107) Add some support for COMMON symbols. We don't support common symbols having different sizes where the larger one is allocated after the smaller one. The linker will fail with an appropriate error message if it happens. - - - - - 75dbedca by Cheng Shao at 2026-03-04T19:47:49-05:00 compiler: fix redundant import of GHC.Hs.Lit This patch removes a redundant import of `GHC.Hs.Lit` which causes a ghc build failure with validate flavours when bootstrapping from 9.14. Fixes #26972. - - - - - 85726253 by Cheng Shao at 2026-03-04T19:47:49-05:00 compiler: avoid unneeded traversals in GHC.Unit.State Following !15591, this patch avoids unneeded traversals in `reportCycles`/`reportUnusable` when log verbosity is below given threshold. Also applies `logVerbAtLeast` when appropriate. Co-authored-by: Codex <codex@openai.com> - - - - - 382b1b78 by Cheng Shao at 2026-03-04T19:47:50-05:00 ghc-internal: fix redundant import in GHC.Internal.Event.Windows.ManagedThreadPool This patch fixes redundant import in `GHC.Internal.Event.Windows.ManagedThreadPool` that causes a compilation error when building windows target with validate flavours and bootstrapping from 9.14. Fixes #26976. - - - - - 240cc9ab by sheaf at 2026-03-04T19:47:51-05:00 System.Info.fullCompilerVersion: add 'since' annot Fixes #26973 - - - - - 35 changed files: - compiler/GHC/ByteCode/Serialize.hs - compiler/GHC/Cmm/Utils.hs - compiler/GHC/Hs/Type.hs - compiler/GHC/StgToCmm/Prim.hs - compiler/GHC/Unit/State.hs - compiler/GHC/Utils/Error.hs - libraries/base/changelog.md - libraries/base/src/GHC/Unicode.hs - libraries/base/src/System/Info.hs - libraries/ghc-internal/ghc-internal.cabal.in - − libraries/ghc-internal/src/GHC/Internal/Data/Version.hs-boot - libraries/ghc-internal/src/GHC/Internal/Event/Windows/ManagedThreadPool.hs - libraries/ghc-internal/src/GHC/Internal/IO/Handle.hs - libraries/ghc-internal/src/GHC/Internal/IO/Handle/Text.hs - libraries/ghc-internal/src/GHC/Internal/IO/Handle/Types.hs - libraries/ghc-internal/src/GHC/Internal/Unicode.hs - libraries/ghc-internal/src/GHC/Internal/Unicode/Version.hs - libraries/ghc-internal/tools/ucd2haskell/exe/UCD2Haskell/ModuleGenerators.hs - rts/Linker.c - rts/LinkerInternals.h - rts/PrimOps.cmm - rts/RtsSymbols.c - rts/Threads.c - rts/Threads.h - rts/include/rts/Threads.h - rts/include/stg/MiscClosures.h - rts/linker/Elf.c - rts/linker/MachO.c - rts/linker/PEi386.c - testsuite/tests/rts/linker/Makefile - + testsuite/tests/rts/linker/T6107.hs - + testsuite/tests/rts/linker/T6107.stdout - + testsuite/tests/rts/linker/T6107_sym1.s - + testsuite/tests/rts/linker/T6107_sym2.s - testsuite/tests/rts/linker/all.T The diff was not included because it is too large. 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