Zubin pushed to branch wip/9.14.2-backports-darwin-ci at Glasgow Haskell Compiler / GHC

Commits:

• f817f41a
  by Andreas Klebinger at 2026-07-27T18:52:57+05:30

  testsuite: Explicitly use utf-8 encoding in rts-includes linter.
  
  Not doing so caused failures on windows, as python failed to pick a
  reasonable encoding even with locale set.
  
  Fixes #26850
  
  (cherry picked from commit 01ecb61234b03b94d08ab649395e2da074a4f9d3)
  

• 47e46cc8
  by Zubin Duggal at 2026-07-27T18:57:26+05:30

  UniqueDFM: alter should preserve insertion order
  
  Before it always inserting new elements at the end.
  This is problematic because instances get inserted into the map with
  `alterF`, which can change ordering of how instances are printed
  with `:info` depending on the order in which we consult interfaces
  
  I expect `alter id k = id` and `alter (fmap f) k = adjust f k`. Moving keys to
  the end breaks that (`adjust` already preserves position).
  
  Fixes #27532
  
  (cherry picked from commit f6f2343fbbfdfd8aaed9babf5983e3e24c08ca85)
  

• e9e7e8ec
  by Zubin Duggal at 2026-07-28T01:21:28+05:30

  hadrian: need libffi before linking the dynamic rts
  
  The rts link passes -lffi but never needed libffi.
  Whether the build succeeded or not was a race depending on
  if we managed to copy the libary before the link.
  

• 5c2425a1
  by Zubin Duggal at 2026-07-28T01:21:28+05:30

  Prepare 9.14.2
  
  Bump filpath submodule to 1.5.5.0
  Bump Win32 submodule to 2.14.2.2
  
  Metric Increase:
      T4029
      T13379
      libdir
  
  Metric Decrease:
      T5030
      T24602_perf_size
      T25046_perf_size_gzip
      T25046_perf_size_unicode
      T25046_perf_size_unicode_gzip
  

71 changed files:

• − changelog.d/26616
• − changelog.d/T26978
• − changelog.d/T26979
• − changelog.d/T27046
• − changelog.d/T27047
• − changelog.d/T27123.md
• − changelog.d/T27124.md
• − changelog.d/T27131
• − changelog.d/T27182.md
• − changelog.d/T27202
• − changelog.d/T27225
• − changelog.d/T27386
• − changelog.d/bump-process
• − changelog.d/deterministic-usage-order
• − 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-exponential-case-desugar-27383
• − changelog.d/fix-finalizers-27072
• − changelog.d/fix-layout-stack-fcall
• − changelog.d/fix-peekitbl-no-tntc
• − changelog.d/fix-use-std-ap-thunk
• − changelog.d/ghc-pkg-faster-closure
• − changelog.d/hadrian-stale-package-confs-26661
• − changelog.d/jobserver-leak-fix
• − changelog.d/more-efficient-home-unit-imports-finding
• − changelog.d/reexported-module-errors
• − changelog.d/semaphore-v2
• − changelog.d/tag-inference-27005
• − changelog.d/unused-type
• − changelog.d/wasm-fix-serviceworker
• − changelog.d/windows-rethrow-overlapped-exception
• compiler/GHC/Types/Unique/DFM.hs
• configure.ac
• docs/users_guide/9.14.2-notes.rst
• hadrian/bootstrap/generate_bootstrap_plans
• + hadrian/bootstrap/plan-9_10_3.json
• + hadrian/bootstrap/plan-9_12_4.json
• + hadrian/bootstrap/plan-bootstrap-9_10_3.json
• + hadrian/bootstrap/plan-bootstrap-9_12_4.json
• hadrian/src/Rules/Library.hs
• hadrian/src/Rules/Register.hs
• libraries/Win32
• libraries/base/base.cabal.in
• libraries/base/changelog.md
• libraries/filepath
• testsuite/tests/ghci/T16793/T16793.stdout
• testsuite/tests/ghci/T18060/T18060.stdout
• + testsuite/tests/ghci/T27532/Makefile
• + testsuite/tests/ghci/T27532/T27532.script
• + testsuite/tests/ghci/T27532/T27532.stdout
• + testsuite/tests/ghci/T27532/all.T
• testsuite/tests/ghci/scripts/ListTuplePunsPpr.stdout
• testsuite/tests/ghci/scripts/T4175.stdout
• testsuite/tests/ghci/scripts/T8469.stdout
• testsuite/tests/ghci/scripts/T8535.stdout
• testsuite/tests/ghci/scripts/T9881.stdout
• testsuite/tests/ghci/scripts/ghci020.stdout
• testsuite/tests/ghci/scripts/ghci064.stdout
• testsuite/tests/ghci/should_run/T10145.stdout
• testsuite/tests/ghci/should_run/T18594.stdout
• testsuite/tests/linters/regex-linters/check-rts-includes.py
• testsuite/tests/partial-sigs/should_compile/ExtraConstraints3.stderr
• testsuite/tests/roles/should_compile/Roles14.stderr
• testsuite/tests/roles/should_compile/Roles3.stderr
• testsuite/tests/roles/should_compile/Roles4.stderr
• testsuite/tests/roles/should_compile/T8958.stderr
• testsuite/tests/typecheck/should_compile/T18406b.stderr
• testsuite/tests/typecheck/should_compile/T18529.stderr
• testsuite/tests/typecheck/should_fail/T5300.stderr

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