Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC

Commits:

• 03082cd4
  by Simon Jakobi at 2026-10-02T17:38:17-04:00

  changelog.d: Fix warning flag name in the semaphore-v2 entry
  
  The entry refers to -Wsemaphore-version-mismatch, which does not exist.
  The warning GHC emits when it cannot use a -jsem semaphore, including
  on a protocol version mismatch, is -Wsemaphore-open-failure.
  
  Context: !15729, #25087
  
  Assisted-by: Claude Fable 5.1
  

• a93705ee
  by Simon Jakobi at 2026-10-02T17:38:17-04:00

  changelog.d: Fix the CLC proposal link in the T27455 entry
  
  The entry used the Sphinx :ref: role with a URL as its target. :ref:
  resolves only internal labels, so the generated release notes would
  show the proposal name without a link. Use the plain hyperlink form
  like the other entries.
  
  Context: !16274, #27455
  
  Assisted-by: Claude Fable 5.1
  

2 changed files:

• changelog.d/T27455
• changelog.d/semaphore-v2

Changes:

 synopsis:

   Don't drop `ExceptionContext` in `SomeException(toException)`

 description:

-  Previously the implementation of ``Exception(toException)`` given to `SomeException` would inappropriately drop the carried `ExceptionContext`. Now ``toException = id``, faithfully implementing the semantics proposed in :ref:`CLC Proposal #200 <https://github.com/haskell/core-libraries-committee/issues/200>`.

+  Previously the implementation of ``Exception(toException)`` given to `SomeException` would inappropriately drop the carried `ExceptionContext`. Now ``toException = id``, faithfully implementing the semantics proposed in `CLC Proposal #200 <https://github.com/haskell/core-libraries-committee/issues/200>`_.

   semaphores); its reported protocol version remains v1.

   When GHC receives a ``-jsem`` name whose protocol version it does not

-  support, it now emits a ``-Wsemaphore-version-mismatch`` warning and

+  support, it now emits a :ghc-flag:`-Wsemaphore-open-failure` warning and

   falls back to ``-j1`` rather than crashing. ``ghc --info`` exposes the

   supported version in a new ``"Semaphore version"`` entry so

   cabal-install can detect a mismatch before invoking GHC.