Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC Commits: e64b3f16 by ARATA Mizuki at 2025-06-17T10:13:42+09:00 MachRegs.h: Don't define NO_ARG_REGS when a XMM register is defined On i386, MAX_REAL_VANILLA_REG is 1, but MAX_REAL_XMM_REG is 4. If we define NO_ARG_REGS on i386, programs that use SIMD vectors may segfault. Closes #25985 A couple of notes on the BROKEN_TESTS field: * This fixes the segfault from T25062_V16. * The failure from T22187_run was fixed in an earlier commit (see #25561), but BROKEN_TESTS was missed at that time. Now should be a good time to mark it fixed. - - - - - c22a1a2c by Matthew Pickering at 2025-06-18T11:42:43-04:00 Improve error messages when implicit lifting fails This patch concerns programs which automatically try to fix level errors by inserting `Lift`. For example: ``` foo x = [| x |] ~> foo x = [| $(lift x) |] ``` Before, there were two problems with the message. 1. (#26031), the location of the error was reported as the whole quotation. 2. (#26035), the message just mentions there is no Lift instance, but gives no indicate why the user program needed a Lift instance in the first place. This problem is especially bad when you disable `ImplicitStagePersistence`, so you just end up with a confusing "No instance for" message rather than an error message about levels This patch fixes both these issues. Firstly, `PendingRnSplice` differentiates between a user-written splice and an implicit lift. Then, the Lift instance is precisely requested with a specific origin in the typechecker. If the instance fails to be solved, the message is reported using the `TcRnBadlyLevelled` constructor (like a normal level error). Fixes #26031, #26035 - - - - - 7aa2d0e7 by Cheng Shao at 2025-06-18T11:42:44-04:00 testsuite: add T26120 marked as broken - - - - - 1e406a99 by Cheng Shao at 2025-06-18T11:42:44-04:00 compiler: fix GHC.SysTools.Ar archive member size writing logic This patch fixes a long-standing bug in `GHC.SysTools.Ar` that emits the wrong archive member size in each archive header. It should encode the exact length of the member payload, excluding any padding byte, otherwise malformed archive that extracts a broken object with an extra trailing byte could be created. Apart from the in-tree `T26120` test, I've also created an out-of-tree testsuite at https://github.com/TerrorJack/ghc-ar-quickcheck that contains QuickCheck roundtrip tests for `GHC.SysTools.Ar`. With this fix, simple roundtrip tests and `writeGNUAr`/GNU `ar` roundtrip test passes. There might be more bugs lurking in here, but this patch is still a critical bugfix already. Fixes #26120 #22586. Co-authored-by: Codex - - - - - 200ae29c by Lauren Yim at 2025-06-18T11:42:50-04:00 fix some typos in the warnings page in the user guide - - - - - 8c81976a by Rodrigo Mesquita at 2025-06-18T11:42:51-04:00 Add a frozen callstack to throwGhcException Fixes #25956 - - - - - b4ab9904 by fendor at 2025-06-18T11:42:51-04:00 Update using.rst to advertise full mhu support for GHCi - - - - - 52 changed files: - .gitlab/generate-ci/gen_ci.hs - .gitlab/jobs.yaml - compiler/GHC/Hs/Expr.hs - compiler/GHC/Iface/Ext/Ast.hs - compiler/GHC/Rename/Splice.hs - compiler/GHC/SysTools/Ar.hs - compiler/GHC/Tc/Errors.hs - compiler/GHC/Tc/Errors/Ppr.hs - compiler/GHC/Tc/Errors/Types.hs - compiler/GHC/Tc/Gen/Head.hs - compiler/GHC/Tc/Gen/Splice.hs - compiler/GHC/Tc/Solver/Monad.hs - compiler/GHC/Tc/Types/Origin.hs - compiler/GHC/Utils/Panic.hs - docs/users_guide/using-warnings.rst - docs/users_guide/using.rst - rts/include/stg/MachRegs.h - testsuite/tests/annotations/should_fail/annfail03.stderr - testsuite/tests/annotations/should_fail/annfail09.stderr - + testsuite/tests/ghc-api/T26120.hs - + testsuite/tests/ghc-api/T26120.stdout - testsuite/tests/ghc-api/all.T - 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.hs - + testsuite/tests/quotes/LiftErrMsg.stderr - + testsuite/tests/quotes/LiftErrMsgDefer.hs - + testsuite/tests/quotes/LiftErrMsgDefer.stderr - + testsuite/tests/quotes/LiftErrMsgTyped.hs - + testsuite/tests/quotes/LiftErrMsgTyped.stderr - testsuite/tests/quotes/T10384.stderr - testsuite/tests/quotes/TH_localname.stderr - testsuite/tests/quotes/all.T - testsuite/tests/splice-imports/SI03.stderr - testsuite/tests/splice-imports/SI05.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/SI31.stderr - 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/T23829_hasty.stderr - testsuite/tests/th/T23829_hasty_b.stderr - testsuite/tests/th/T5795.stderr The diff was not included because it is too large. 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