Zubin pushed to branch wip/9.14.2-rc2 at Glasgow Haskell Compiler / GHC Commits: 648af8f0 by Luite Stegeman at 2026-09-16T09:53:32+05:30 rts: handle large CONSTR closures in compacting GC The function update_fwd_large in the compacting GC could run into an unexpected object with the following error: internal error: update_fwd_large: unknown/strange object 1 Closure type 1 is CONSTR. This patch adds cases for CONSTR and CONSTR_NOCAF. This is the same problem as #27434 (large AP closures, fixed by cca0d58963), which missed this case. Fixes #27649 (cherry picked from commit 749d2448eb56367046b2de890f1bf89a856ce53f) - - - - - 0a6498db by Luite Stegeman at 2026-09-16T09:53:37+05:30 testsuite: fix T27434 test with compacting GC Ensure that the interpreter is actually run with the compacting GC (cherry picked from commit 177d615518a44dde595f3166f56ec604e0675b3b) - - - - - 051e50cf by Luite Stegeman at 2026-09-16T09:53:44+05:30 rts: initialise the stack frame header for mask_frame and apply_mask_frame We must leave the stack in consistent state before jumping to mask_frame or apply_mask_frame because they may result. Failing to do so could lead to a crash if there were waiting exceptions. Fixes #27651 (cherry picked from commit 5796aa637cca079854fc7e84e7e0fa497aacab3c) - - - - - 06fafb03 by Simon Peyton Jones at 2026-09-16T09:59:17+05:30 Re-introduce the "weird SpecDict" case In this commit commit f80375dd4945350a1d784e436975b48b9c736eaf Author: Simon Peyton Jones <simon.peytonjones@gmail.com> Date: Sun Jun 29 15:26:58 2025 +0100 Refactor of Specialise.hs I removed a test for a dictionary with unbound type variables. This turned out to be wrong; see #27629. So this MR re-introduces it. (cherry picked from commit 2486cc92cea451fd6528292252a8f384e3b34dcb) - - - - - a878ad4f by Luite Stegeman at 2026-09-16T09:59:17+05:30 rts: make stg_threadLabelzh return a valid pointer for unlabeled threads. This fixes a segfault in the GC caused by stg_threadLabelzh returning a 0 pointer in a GC pointer field. stg_threadLabelzh returns a tuple of type (# Int#, ByteArray# #). If a thread has no label, the second field is unused. We must still return a valid heap object pointer. Instead of returning 0, we now return stg_DEAD_SLOT_closure. fixes #27618 (cherry picked from commit 809294f14cf6939b249d93af92c0ae174dda5b4a) - - - - - 9033629c by Zubin Duggal at 2026-09-16T09:59:17+05:30 Prepare 9.14.2-rc2 ------------------------- Metric Decrease: T4029 ------------------------- - - - - - 47 changed files: - − changelog.d/27626 - − changelog.d/27627 - − changelog.d/27703 - − changelog.d/27704 - − changelog.d/27717 - − changelog.d/T26423 - − changelog.d/T26716 - − changelog.d/T27202 - − changelog.d/T27308 - − changelog.d/T27314.md - − changelog.d/T27360 - − changelog.d/T27440 - − changelog.d/T27455 - − changelog.d/T27583 - − changelog.d/T27586 - + changelog.d/T27629 - − changelog.d/T27639 - − changelog.d/T27657 - − changelog.d/T27705 - − changelog.d/arm_ncg_fixes_T27430 - + changelog.d/fix-compacting-gc-constr-27649 - + changelog.d/fix-control0-mask-trampoline - − changelog.d/fix-parallel-gc-selector-race-27477 - + changelog.d/fix-threadlabel-segfault-27618 - − changelog.d/llvm-23 - − changelog.d/unit-index - compiler/GHC/Core/Opt/Specialise.hs - docs/users_guide/9.14.2-notes.rst - libraries/base/changelog.md - rts/ContinuationOps.cmm - rts/PrimOps.cmm - rts/StgMiscClosures.cmm - rts/include/stg/MiscClosures.h - rts/sm/Compact.c - + testsuite/tests/rts/T27618.hs - + testsuite/tests/rts/T27618.stdout - + testsuite/tests/rts/T27649.hs - + testsuite/tests/rts/T27649.stdout - testsuite/tests/rts/all.T - + testsuite/tests/rts/continuations/T27651.hs - + testsuite/tests/rts/continuations/T27651.stdout - testsuite/tests/rts/continuations/all.T - testsuite/tests/simplCore/should_compile/Makefile - + testsuite/tests/simplCore/should_compile/T27629.hs - + testsuite/tests/simplCore/should_compile/T27629.stderr - + testsuite/tests/simplCore/should_compile/T27629Plugin.hs - testsuite/tests/simplCore/should_compile/all.T The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/baa7741a06e2a2e9dfcfb5158297cc8... -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/baa7741a06e2a2e9dfcfb5158297cc8... You're receiving this email because of your account on gitlab.haskell.org. Manage all notifications: https://gitlab.haskell.org/-/profile/notifications | Help: https://gitlab.haskell.org/help