Matthew Pickering pushed to branch wip/stack-cloning-segfault at Glasgow Haskell Compiler / GHC Commits: 23a50772 by Rajkumar Natarajan at 2026-03-10T14:11:37-04:00 chore: Merge GHC.Internal.TH.Quote into GHC.Internal.TH.Monad Move the QuasiQuoter datatype from GHC.Internal.TH.Quote to GHC.Internal.TH.Monad and delete the Quote module. Update submodule template-haskell-quasiquoter to use the merged upstream version that imports from the correct module. Co-authored-by: Cursor - - - - - a2bb6fc3 by Simon Jakobi at 2026-03-10T14:12:23-04:00 Add regression test for #16122 - - - - - 604e1180 by Cheng Shao at 2026-03-11T15:00:42-04:00 hadrian: remove the broken bench flavour This patch removes the bench flavour from hadrian which has been broken for years and not used for actual benchmarking (for which `perf`/`release` is used instead). Closes #26825. - - - - - c3e64915 by Simon Jakobi at 2026-03-11T15:01:31-04:00 Add regression test for #18186 The original TypeInType language extension is replaced with DataKinds+PolyKinds for compatibility. Closes #18186. - - - - - 664996c7 by Andreas Klebinger at 2026-03-11T15:02:16-04:00 Bump nofib submodule. We accrued a number of nofib fixes we want to have here. - - - - - 517cf64e by Simon Jakobi at 2026-03-11T15:03:03-04:00 Add regression test for #15907 Closes #15907. - - - - - fff362cf by Simon Jakobi at 2026-03-11T15:03:49-04:00 Ensure T14272 is run in optasm way Closes #16539. - - - - - ec81ec2c by Simon Jakobi at 2026-03-11T15:03:49-04:00 Add regression test for #24632 Closes #24632. - - - - - cefec47b by Simon Jakobi at 2026-03-11T15:03:50-04:00 Fix module name of T9675: T6975 -> T9675 - - - - - d3690ae8 by Andreas Klebinger at 2026-03-11T15:04:31-04:00 User guide: Clarify phase control on INLINEABLE[foo] pragmas. Fixes #26851 - - - - - e7054934 by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #12694 Closes #12694. - - - - - 4756d9f6 by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #16275 Closes #16275. - - - - - 34b7e2c1 by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #14908 Closes #14908. - - - - - 4243db3d by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #14151 Closes #14151. - - - - - 0e9f1453 by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #12640 Closes #12640. - - - - - ae606c7f by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #15588 Closes #15588. - - - - - 5a38ce4e by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #9445 Closes #9445. - - - - - d054b467 by Cheng Shao at 2026-03-11T15:05:59-04:00 compiler: implement string interning logic for BCONPtrFS This patch adds a `FastStringEnv`-based cache of `MallocStrings` requests to `Interp`, so that when we load bytecode with many breakpoints that share the same module names & unit ids, we reuse the allocated remote pointers instead of issuing duplicte `MallocStrings` requests and bloating the C heap. Closes #26995. - - - - - b85a0293 by Simon Jakobi at 2026-03-11T15:06:41-04:00 Add perf test for #1216 Closes #1216. - - - - - cd7f7420 by Sylvain Henry at 2026-03-11T15:07:58-04:00 JS: check that tuple constructors are linked (#23709) Test js-mk_tup was failing before because tuple constructors weren't linked in. It's no longer an issue after the linker fixes. - - - - - d57f01a4 by Matthew Pickering at 2026-03-11T15:08:40-04:00 testsuite: Add test for foreign import prim with unboxed tuple return This commit just adds a test that foreign import prim works with unboxed sums. - - - - - 23d111ce by Matthew Pickering at 2026-03-11T15:08:41-04:00 Return a valid pointer in advanceStackFrameLocationzh When there is no next stack chunk, `advanceStackFrameLocationzh` used to return NULL in the pointer-typed StackSnapshot# result slot. Even though the caller treats that case as "no next frame", the result is still materialized in a GC-visible pointer slot. If a GC observes the raw NULL there, stack decoding can crash. Fix this by ensuring the dead pointer slot contains a valid closure pointer. Also make the optional result explicit by returning an unboxed sum instead of a tuple with a separate tag. Fixes #27009 - - - - - 4c58a3ae by Cheng Shao at 2026-03-11T15:09:22-04:00 hadrian: build profiled dynamic objects with -dynamic-too This patch enables hadrian to build profiled dynamic objects with `-dynamic-too`, addressing a build parallelism bottleneck in release pipelines. Closes #27010. - - - - - 59801927 by Matthew Pickering at 2026-03-11T21:40:55+00:00 rts: forward clone-stack messages after TSO migration MSG_CLONE_STACK assumed that the target TSO was still owned by the capability that received the message. This is not always true: the TSO can migrate before the inbox entry is handled. When that happened, handleCloneStackMessage could clone a live stack from the wrong capability and use the wrong capability for allocation and performTryPutMVar, leading to stack sanity failures such as checkStackFrame: weird activation record found on stack. Fix this by passing the current capability into handleCloneStackMessage, rechecking msg->tso->cap at handling time, and forwarding the message if the TSO has migrated. Once ownership matches, use the executing capability consistently for cloneStack, rts_apply, and performTryPutMVar. Fixes #27008 - - - - - 70 changed files: - compiler/GHC/Builtin/Names/TH.hs - compiler/GHC/ByteCode/Linker.hs - compiler/GHC/Driver/Main.hs - compiler/GHC/Runtime/Interpreter/Init.hs - compiler/GHC/Runtime/Interpreter/Types.hs - docs/users_guide/exts/pragmas.rst - docs/users_guide/exts/rewrite_rules.rst - hadrian/doc/flavours.md - hadrian/hadrian.cabal - hadrian/src/Rules/Compile.hs - hadrian/src/Settings.hs - hadrian/src/Settings/Builders/Ghc.hs - − hadrian/src/Settings/Flavours/Benchmark.hs - libraries/ghc-boot-th/GHC/Boot/TH/Quote.hs - libraries/ghc-internal/cbits/Stack.cmm - libraries/ghc-internal/ghc-internal.cabal.in - libraries/ghc-internal/src/GHC/Internal/Stack/Decode.hs - libraries/ghc-internal/src/GHC/Internal/TH/Monad.hs - − libraries/ghc-internal/src/GHC/Internal/TH/Quote.hs - libraries/template-haskell-quasiquoter - nofib - rts/CloneStack.c - rts/CloneStack.h - rts/Messages.c - + testsuite/tests/corelint/T15907.hs - + testsuite/tests/corelint/T15907A.hs - testsuite/tests/corelint/all.T - + testsuite/tests/dependent/should_fail/T15588.hs - + testsuite/tests/dependent/should_fail/T15588.stderr - testsuite/tests/dependent/should_fail/all.T - + testsuite/tests/ffi/should_run/PrimFFIUnboxedSum.hs - + testsuite/tests/ffi/should_run/PrimFFIUnboxedSum.stdout - + testsuite/tests/ffi/should_run/PrimFFIUnboxedSum_cmm.cmm - testsuite/tests/ffi/should_run/all.T - + testsuite/tests/ghci/scripts/T24632.hs - + testsuite/tests/ghci/scripts/T24632.script - + testsuite/tests/ghci/scripts/T24632.stdout - testsuite/tests/ghci/scripts/all.T - testsuite/tests/javascript/js-mk_tup.hs - testsuite/tests/javascript/js-mk_tup.stdout - testsuite/tests/linters/Makefile - testsuite/tests/perf/compiler/T9675.hs - + testsuite/tests/perf/should_run/T1216.hs - + testsuite/tests/perf/should_run/T1216.stdout - testsuite/tests/perf/should_run/all.T - testsuite/tests/plugins/plugins10.stdout - + testsuite/tests/polykinds/T18186.hs - + testsuite/tests/polykinds/T18186.stderr - testsuite/tests/polykinds/all.T - testsuite/tests/quotes/QQError.stderr - testsuite/tests/rts/all.T - + testsuite/tests/rts/cloneThreadStackMigrating.hs - + testsuite/tests/simplCore/should_compile/T12640.hs - + testsuite/tests/simplCore/should_compile/T12640.stderr - + testsuite/tests/simplCore/should_compile/T14908.hs - + testsuite/tests/simplCore/should_compile/T14908_Deps.hs - + testsuite/tests/simplCore/should_compile/T16122.hs - + testsuite/tests/simplCore/should_compile/T16122.stderr - + testsuite/tests/simplCore/should_compile/T9445.hs - testsuite/tests/simplCore/should_compile/all.T - testsuite/tests/th/QQTopError.stderr - + testsuite/tests/typecheck/should_compile/T14151.hs - testsuite/tests/typecheck/should_compile/all.T - + testsuite/tests/typecheck/should_fail/T12694.hs - + testsuite/tests/typecheck/should_fail/T12694.stderr - + testsuite/tests/typecheck/should_fail/T16275.stderr - + testsuite/tests/typecheck/should_fail/T16275A.hs - + testsuite/tests/typecheck/should_fail/T16275B.hs - + testsuite/tests/typecheck/should_fail/T16275B.hs-boot - testsuite/tests/typecheck/should_fail/all.T The diff was not included because it is too large. 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