Zubin pushed to branch wip/ghc-9.14-final at Glasgow Haskell Compiler / GHC Commits: 9589591f by Zubin Duggal at 2025-12-18T02:13:34+05:30 rel-notes: updates for final 9.14.1 release - - - - - b6175085 by Zubin Duggal at 2025-12-18T02:13:34+05:30 Prepare final 9.14.1 release - - - - - 3 changed files: - configure.ac - docs/users_guide/9.14.1-notes.rst - libraries/base/changelog.md Changes: ===================================== configure.ac ===================================== @@ -22,7 +22,7 @@ AC_INIT([The Glorious Glasgow Haskell Compilation System], [9.14.0], [glasgow-ha AC_CONFIG_MACRO_DIRS([m4]) # Set this to YES for a released version, otherwise NO -: ${RELEASE=NO} +: ${RELEASE=YES} # The primary version (e.g. 7.5, 7.4.1) is set in the AC_INIT line # above. If this is not a released version, then we will append the ===================================== docs/users_guide/9.14.1-notes.rst ===================================== @@ -110,6 +110,9 @@ Language - Explicit level import support, allowing ``import`` declarations to explicitly state which compilation stages they are are visible to. +- Fix handling of tabs in string gaps (:ghc-ticket:`26415`). Tabs are now + correctly treated as whitespace in string gaps, matching the Haskell Report. + Compiler ~~~~~~~~ @@ -160,6 +163,23 @@ Compiler - Initial native code generator support for the LoongArch CPU architecture. +- Several fixes to :extension:`DeepSubsumption` type checking, improving handling + of higher-rank types in various contexts (:ghc-ticket:`26225`, :ghc-ticket:`26255`, + :ghc-ticket:`26277`, :ghc-ticket:`26331`, :ghc-ticket:`26332`). + +- Fix a scoping error in the Specialiser that could cause incorrect code generation + with :ghc-flag:`-fpolymorphic-specialisation` (:ghc-ticket:`26329`). + +- Fix a long-standing bug in the coercion optimiser that could produce invalid + coercions for ``ForAllCo`` (:ghc-ticket:`26345`). + +- Fix the type-family occurs check in unification (:ghc-ticket:`26457`). + +- Fix solving of forall-constraints (quantified constraints) to avoid infinite + loops in certain cases (:ghc-ticket:`26314`, :ghc-ticket:`26315`, :ghc-ticket:`26376`). + +- Fix reporting of redundant constraints on default-method declarations + (:ghc-ticket:`25992`). GHCi ~~~~ @@ -188,6 +208,12 @@ GHCi debugging clients * Internal refactorings towards making the debugger multi-thread aware (:ghc-ticket:`26064`) +- Fix bytecode generation for unsaturated applications of data constructor + workers (:ghc-ticket:`23210`). + +- Fix bytecode to use 32 bits for breakpoint indices, allowing more breakpoints + in large modules (:ghc-ticket:`26325`). + WebAssembly backend ~~~~~~~~~~~~~~~~~~~ @@ -201,6 +227,18 @@ See the blog post on `Tweag's blog https://www.tweag.io/blog/2025-04-17-wasm-ghci-browser/`_ for more information. +- Fix handling of forward declared ``GOT.func`` items in the wasm dynamic + linker (:ghc-ticket:`26430`). + +- Fix ``setKeepCAFs()`` to be properly called during wasm GHCi initialization + (:ghc-ticket:`26106`). + +- Fix JSFFI initialization constructor code to avoid clashing with user-defined + main functions. + +- Improve error handling in the JavaScript linker when library directories + are misconfigured (:ghc-ticket:`26383`). + Runtime system ~~~~~~~~~~~~~~ @@ -212,17 +250,44 @@ Runtime system - Reorganise how certain symbols are linked to avoid a bootstrapping failure with the linker shipping newer macOS versions (:ghc-ticket:`26166`) +- Fix eager black holes handling: properly record mutated closures and fix + an incorrect assertion that could cause issues with multiple threads racing + to claim a black hole (:ghc-ticket:`26495`) + +- Fix the Windows runtime linker to copy DLL path strings before inserting + them into the cache, preventing use-after-free issues (:ghc-ticket:`26613`) + +- Fix lost wakeups in ``threadPaused`` for threads blocked on black holes, + which could cause hangs in concurrent programs (:ghc-ticket:`26324`). + +- Fix heap reservation logic on POSIX systems to avoid infinite loops when + the OS repeatedly returns low memory addresses (:ghc-ticket:`26151`). + +- Fix handling of ``WHITEHOLE`` closures in ``scavenge_one`` when using the + non-moving garbage collector (:ghc-ticket:`26204`). + +- Fix alignment for ``gen_workspace`` on s390x to allow bootstrap on that + platform (:ghc-ticket:`26334`). + +- Push the correct update frame type in ``stg_AP_STACK`` for eager black holes. + ``base`` library ~~~~~~~~~~~~~~~~ - Updated to `Unicode 17.0.0 https://www.unicode.org/versions/Unicode17.0.0`_. +- Removed unstable heap representation details from ``GHC.Exts`` (:ghc-ticket:`25110`). + ``ghc-prim`` library ~~~~~~~~~~~~~~~~~~~~ ``ghc-prim`` is now a legacy interface providing access to primitive operations and types which are now also exposed via the ``ghc-experimental`` package. +- A new primop ``annotateStack#`` has been added, allowing arbitrary data to be + pushed onto the call stack for later extraction when decoding stack traces + (:ghc-ticket:`26218`). + ``ghc`` library ~~~~~~~~~~~~~~~ @@ -263,6 +328,16 @@ and types which are now also exposed via the ``ghc-experimental`` package. reading of the relevant Closure attributes without reliance on incomplete selectors. +* Fix a race condition with profiling builds (:ghc-ticket:`15197`, :ghc-ticket:`26407`). + +* Fix stack decoding when using the profiled runtime (:ghc-ticket:`26507`). + +``ghc-internal`` library +~~~~~~~~~~~~~~~~~~~~~~~~ + +* Fix ``naturalAndNot`` for the ``NB``/``NS`` (native bignum) case + (:ghc-ticket:`26230`). + ``ghc-experimental`` library ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ===================================== libraries/base/changelog.md ===================================== @@ -1,6 +1,6 @@ # Changelog for [`base` package](http://hackage.haskell.org/package/base) -## 4.22.0.0 *TBA* +## 4.22.0.0 *December 2025* * Shipped with GHC 9.14.1 * The internal `GHC.Weak.Finalize.runFinalizerBatch` function has been deprecated ([CLC proposal #342](https://github.com/haskell/core-libraries-committee/issues/342)) * Define `displayException` of `SomeAsyncException` to unwrap the exception. 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