Zubin pushed to branch wip/10.0.1-backports at Glasgow Haskell Compiler / GHC

Commits:

• cc79cc62
  by Zubin Duggal at 2026-09-16T18:28:37+05:30

  ghc-internal: annotateSTM should use catchSTM# rather than catch#
  
  A catch# frame inside a transaction breaks retry and async exception
  delivery.
  
  Fixes #27657
  
  (cherry picked from commit fd22f71ee92595f4634206455d8eab111488d836)
  

• 916a4f04
  by Ian-Woo Kim at 2026-09-16T19:06:38+05:30

  Make the order of usages deterministic
  
  It has been observed that the ordering of usages can be non-determinstic
  in parallel builds. Therefore, this contribution introduces sorting of
  usages based on a platform- and race-independent sorting criterion.
  
  Resolves #26877.
  
  Co-authored-by: Wolfgang Jeltsch <wolfgang@well-typed.com>
  (cherry picked from commit d216412babfd5b5746365f0686ec370fb0892ec7)
  

• a3f4ed4c
  by mangoiv at 2026-09-16T19:06:38+05:30

  compiler: refactor error reporting code for ExplicitLevelImports
  
  Refactors error reporting code for ExplicitLevelImports to pass in a
  RdrName and a GlobalReaderElt to be able to report errors that are
  faithful to the source and to more precisely distinguish between names
  that are in scope from different qualifications.
  
  Fixes #27385 and #26616
  
  (cherry picked from commit 141986e3680a24b76e21a7ad4ce6290a7413c7f5)
  

• be82ccef
  by Simon Jakobi at 2026-09-16T19:10:47+05:30

  ci: Actually pass --ignore-perf-failures to the testsuite driver
  
  684c0018d9 changed the IGNORE_PERF_FAILURES handling to append to
  RUNTEST_ARGS with bash array syntax, but the three use sites still
  expand RUNTEST_ARGS as a scalar, which yields only the first array
  element. The appended flag was therefore dropped in every job, so
  perf improvements kept failing Marge Bot batches and master pipelines,
  contrary to #19562.
  
  Append as a string instead, matching the existing --force-colors
  append in test_hadrian.
  
  Fixes #27563.
  
  Assisted-by: Claude Fable 5.1
  (cherry picked from commit 4e9297ea064704da1606364365287ccf0039f7c2)
  

• 3a434988
  by Zubin Duggal at 2026-09-16T22:28:37+05:30

  Prepare 10.0.1-alpha1
  
  Metric Increase:
      T4801
  
  Metric Decrease:
      CoOpt_Read
      InstanceMatching
      ManyAlternatives
      RecordUpdPerf
      T13719
      T14683
      T15164
      T16577
      T20261
      T4801
      T5321Fun
      T783
      T9233
      T9872b_defer
  

154 changed files:

• .gitlab/ci.sh
• − changelog.d/27532
• − changelog.d/27626
• − changelog.d/27627
• − changelog.d/27703
• − changelog.d/27704
• − changelog.d/27717
• − changelog.d/T25636
• − changelog.d/T26423
• − changelog.d/T26716
• − changelog.d/T26978
• − changelog.d/T26979
• − changelog.d/T27046
• − changelog.d/T27047
• − changelog.d/T27121.md
• − changelog.d/T27123.md
• − changelog.d/T27124.md
• − changelog.d/T27131
• − changelog.d/T27182.md
• − changelog.d/T27202
• − changelog.d/T27225
• − changelog.d/T27308
• − changelog.d/T27314.md
• − changelog.d/T27359
• − changelog.d/T27360
• − changelog.d/T27386
• − changelog.d/T27440
• − changelog.d/T27455
• − changelog.d/T27456
• − changelog.d/T27583
• − changelog.d/T27586
• − changelog.d/T27629
• − changelog.d/T27639
• − changelog.d/T27705
• − changelog.d/T27749
• − changelog.d/T27764
• − changelog.d/arm_ncg_fixes_T27430
• − changelog.d/bump-process
• − changelog.d/dynamic-trace-flags
• − changelog.d/fix-absent-dict-projection
• − changelog.d/fix-blackhole-handling
• − changelog.d/fix-cmm-atomic-load-store
• − changelog.d/fix-compacting-gc-ap-27434
• − changelog.d/fix-compacting-gc-constr-27649
• − changelog.d/fix-control0-mask-trampoline
• − changelog.d/fix-exponential-case-desugar-27383
• − changelog.d/fix-finalizers-27072
• − changelog.d/fix-layout-stack-fcall
• − changelog.d/fix-parallel-gc-selector-race-27477
• − changelog.d/fix-peekitbl-no-tntc
• − changelog.d/fix-threadlabel-segfault-27618
• − changelog.d/fix-use-std-ap-thunk
• − changelog.d/ghc-pkg-faster-closure
• − changelog.d/hadrian-stale-package-confs-26661
• − changelog.d/inter-module-far-jumps-aarch64-default
• − changelog.d/ipe-event-class
• − changelog.d/jobserver-leak-fix
• − changelog.d/link-deterministic-order
• − changelog.d/llvm-22
• − changelog.d/llvm-23
• − changelog.d/more-efficient-home-unit-imports-finding
• − changelog.d/reexported-module-errors
• − changelog.d/semaphore-v2
• − changelog.d/tag-inference-27005
• − changelog.d/tcplugin_init.md
• − changelog.d/tcplugins-pmc.md
• − changelog.d/typecheckModule-API.md
• − changelog.d/unit-index
• − changelog.d/unused-type
• − changelog.d/wasm-fix-serviceworker
• − changelog.d/windows-rethrow-overlapped-exception
• − changelog.d/withTcPlugins.md
• compiler/GHC/Hs/Expr.hs
• compiler/GHC/HsToCore/Usage.hs
• compiler/GHC/Rename/Env.hs
• compiler/GHC/Rename/Expr.hs
• compiler/GHC/Rename/HsType.hs
• compiler/GHC/Rename/Module.hs
• compiler/GHC/Rename/Pat.hs
• compiler/GHC/Rename/Splice.hs
• compiler/GHC/Rename/Splice.hs-boot
• compiler/GHC/Rename/Unbound.hs
• compiler/GHC/Tc/Errors.hs
• compiler/GHC/Tc/Errors/Ppr.hs
• compiler/GHC/Tc/Errors/Types.hs
• compiler/GHC/Tc/Gen/Export.hs
• compiler/GHC/Tc/Utils/Env.hs
• compiler/GHC/Tc/Utils/Monad.hs
• compiler/GHC/Types/Name/Reader.hs
• compiler/GHC/Unit/Module/Deps.hs
• docs/users_guide/10.0.1-notes.rst
• docs/users_guide/exts/static_pointers.rst
• docs/users_guide/runtime_control.rst
• libraries/base/changelog.md
• libraries/ghc-experimental/CHANGELOG.md
• libraries/ghc-internal/CHANGELOG.md
• libraries/ghc-internal/src/GHC/Internal/STM.hs
• testsuite/tests/annotations/should_fail/annfail03.stderr
• testsuite/tests/annotations/should_fail/annfail04.stderr
• testsuite/tests/annotations/should_fail/annfail06.stderr
• testsuite/tests/annotations/should_fail/annfail09.stderr
• + testsuite/tests/concurrent/should_run/T27657a.hs
• + testsuite/tests/concurrent/should_run/T27657a.stdout
• + testsuite/tests/concurrent/should_run/T27657b.hs
• + testsuite/tests/concurrent/should_run/T27657b.stdout
• testsuite/tests/concurrent/should_run/all.T
• testsuite/tests/ghci/T27532/Makefile
• − testsuite/tests/ghci/T27532/T27532.stdout
• − testsuite/tests/ghci/T27532/a.script
• testsuite/tests/ghci/T27532/all.T
• − testsuite/tests/ghci/T27532/b.script
• testsuite/tests/quasiquotation/qq001/qq001.stderr
• testsuite/tests/quasiquotation/qq002/qq002.stderr
• testsuite/tests/quasiquotation/qq003/qq003.stderr
• testsuite/tests/quasiquotation/qq004/qq004.stderr
• testsuite/tests/quotes/LiftErrMsg.stderr
• testsuite/tests/quotes/LiftErrMsgDefer.stderr
• testsuite/tests/quotes/LiftErrMsgTyped.stderr
• testsuite/tests/quotes/T10384.stderr
• testsuite/tests/quotes/T5721.stderr
• testsuite/tests/quotes/TH_localname.stderr
• testsuite/tests/splice-imports/SI03.stderr
• testsuite/tests/splice-imports/SI05.stderr
• testsuite/tests/splice-imports/SI08.stderr
• testsuite/tests/splice-imports/SI08_oneshot.stderr
• testsuite/tests/splice-imports/SI16.stderr
• testsuite/tests/splice-imports/SI18.stderr
• testsuite/tests/splice-imports/SI20.stderr
• testsuite/tests/splice-imports/SI25.stderr
• testsuite/tests/splice-imports/SI28.stderr
• testsuite/tests/splice-imports/SI29.stderr
• testsuite/tests/splice-imports/SI31.stderr
• testsuite/tests/splice-imports/SI36.stderr
• testsuite/tests/splice-imports/T26088.stderr
• testsuite/tests/splice-imports/T26090.stderr
• + testsuite/tests/splice-imports/T26616.hs
• + testsuite/tests/splice-imports/T26616.stderr
• testsuite/tests/splice-imports/all.T
• testsuite/tests/th/T16976z.stderr
• testsuite/tests/th/T17820a.stderr
• testsuite/tests/th/T17820b.stderr
• testsuite/tests/th/T17820c.stderr
• testsuite/tests/th/T17820d.stderr
• testsuite/tests/th/T17820e.stderr
• testsuite/tests/th/T21547.stderr
• testsuite/tests/th/T23829_hasty.stderr
• testsuite/tests/th/T23829_hasty_b.stderr
• testsuite/tests/th/T23829_tardy.ghc.stderr
• testsuite/tests/th/T26098_local.stderr
• testsuite/tests/th/T26098_quote.stderr
• testsuite/tests/th/T26098_splice.stderr
• testsuite/tests/th/T26099.stderr
• testsuite/tests/th/T26568.stderr
• testsuite/tests/th/T5795.stderr

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