[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 10 commits: Report solid equality errors before custom errors

Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC Commits: ba210d98 by Simon Peyton Jones at 2025-09-08T16:26:36+01:00 Report solid equality errors before custom errors This MR fixes #26255 by * Reporting solid equality errors like Int ~ Bool before "custom type errors". See comments in `report1` in `reportWanteds` * Suppressing errors that arise from superclasses of Wanteds. See (SCE1) in Note [Suppressing confusing errors] More details in #26255. - - - - - 07a3ab2b by Simon Peyton Jones at 2025-09-10T00:18:58-04:00 Fix a scoping error in Specialise This small patch fixes #26329, which triggered a scoping error. Test is in T21391, with -fpolymorphic-specialisation enabled - - - - - e2cc70c4 by Simon Peyton Jones at 2025-09-10T00:18:59-04:00 Solve forall-constraints via an implication, again In this earlier commit: commit 953fd8f1dc080f1c56e3a60b4b7157456949be29 Author: Simon Peyton Jones Date: Mon Jul 21 10:06:43 2025 +0100 Solve forall-constraints immediately, or not at all I used a all-or-nothing strategy for quantified constraints (aka forall-constraints). But alas that fell foul of #26315, and #26376. So this MR goes back to solving a quantified constraint by turning it into an implication; UNLESS we are simplifying constraints from a SPECIALISE pragma, in which case the all-or-nothing strategy is great. See: Note [Solving a Wanted forall-constraint] Other stuff in this MR: * TcSMode becomes a record of flags, rather than an enumeration type; much nicer. * Some fancy footwork to avoid error messages worsening again (The above MR made them better; we want to retain that.) See `GHC.Tc.Errors.Ppr.pprQCOriginExtra`. - - - - - 55d10488 by sheaf at 2025-09-10T00:19:14-04:00 Make rationalTo{Float,Double} inline in phase 0 We hold off on inlining these until phase 0 to allow constant-folding rules to fire. However, once we get to phase 0, we should inline them, e.g. to expose unboxing opportunities. See CLC proposal #356. - - - - - 9eed5ac0 by Andreas Klebinger at 2025-09-10T00:19:16-04:00 Add regression test for #26056 - - - - - 1f00b066 by sheaf at 2025-09-10T00:19:21-04:00 Deep subsumption: unify mults without tcEqMult As seen in #26332, we may well end up with a non-reflexive multiplicity coercion when doing deep subsumption. We should do the same thing that we do without deep subsumption: unify the multiplicities normally, without requiring that the coercion is reflexive (which is what 'tcEqMult' was doing). Fixes #26332 - - - - - 25fa5801 by Moritz Angermann at 2025-09-10T00:19:22-04:00 Improve mach-o relocation information This change adds more information about the symbol and addresses we try to relocate in the linker. This significantly helps when deubbging relocation issues reported by users. - - - - - 1a0cb645 by Moritz Angermann at 2025-09-10T00:19:23-04:00 testsuite: Fix broken exec_signals_child.c There is no signal 0. The signal mask is 1-32. - - - - - 4392b600 by Moritz Angermann at 2025-09-10T00:19:24-04:00 testsuite: clarify Windows/Darwin locale rationale for skipping T6037 T2507 T8959a - - - - - 0be4dca5 by Moritz Angermann at 2025-09-10T00:19:24-04:00 Skip broken tests on macOS (due to leading underscore not handled properly in the expected output.) - - - - - 70 changed files: - compiler/GHC/Core/Opt/Specialise.hs - compiler/GHC/Core/Type.hs - compiler/GHC/Core/Unify.hs - compiler/GHC/HsToCore/Binds.hs - compiler/GHC/HsToCore/Pmc/Solver.hs - compiler/GHC/Tc/Deriv/Utils.hs - compiler/GHC/Tc/Errors.hs - compiler/GHC/Tc/Errors/Ppr.hs - compiler/GHC/Tc/Gen/Sig.hs - compiler/GHC/Tc/Solver.hs - compiler/GHC/Tc/Solver/Default.hs - compiler/GHC/Tc/Solver/Dict.hs - compiler/GHC/Tc/Solver/Equality.hs - compiler/GHC/Tc/Solver/InertSet.hs - compiler/GHC/Tc/Solver/Monad.hs - compiler/GHC/Tc/Solver/Solve.hs - compiler/GHC/Tc/Solver/Solve.hs-boot - compiler/GHC/Tc/Types/Constraint.hs - compiler/GHC/Tc/Types/Evidence.hs - compiler/GHC/Tc/Types/Origin.hs - compiler/GHC/Tc/Utils/Monad.hs - compiler/GHC/Tc/Utils/TcType.hs - compiler/GHC/Tc/Utils/Unify.hs - compiler/GHC/Tc/Zonk/TcType.hs - compiler/GHC/Tc/Zonk/Type.hs - libraries/base/changelog.md - libraries/ghc-internal/src/GHC/Internal/Float.hs - rts/linker/MachO.c - testsuite/tests/backpack/should_fail/bkpfail11.stderr - testsuite/tests/backpack/should_fail/bkpfail43.stderr - testsuite/tests/deriving/should_fail/T12768.stderr - testsuite/tests/deriving/should_fail/T1496.stderr - testsuite/tests/deriving/should_fail/T21302.stderr - testsuite/tests/deriving/should_fail/T22696b.stderr - testsuite/tests/deriving/should_fail/T5498.stderr - testsuite/tests/deriving/should_fail/T7148.stderr - testsuite/tests/deriving/should_fail/T7148a.stderr - testsuite/tests/driver/all.T - testsuite/tests/impredicative/T17332.stderr - + testsuite/tests/linear/should_compile/T26332.hs - testsuite/tests/linear/should_compile/all.T - + testsuite/tests/profiling/should_compile/T26056.hs - testsuite/tests/profiling/should_compile/all.T - testsuite/tests/quantified-constraints/T19690.stderr - testsuite/tests/quantified-constraints/T19921.stderr - testsuite/tests/quantified-constraints/T21006.stderr - testsuite/tests/roles/should_fail/RolesIArray.stderr - testsuite/tests/rts/exec_signals_child.c - testsuite/tests/rts/linker/T11223/all.T - testsuite/tests/simplCore/should_compile/DsSpecPragmas.hs - testsuite/tests/simplCore/should_compile/DsSpecPragmas.stderr - testsuite/tests/typecheck/should_compile/T14434.hs - + testsuite/tests/typecheck/should_compile/T26376.hs - testsuite/tests/typecheck/should_compile/all.T - testsuite/tests/typecheck/should_fail/T15801.stderr - testsuite/tests/typecheck/should_fail/T18851.hs - testsuite/tests/typecheck/should_fail/T19627.stderr - testsuite/tests/typecheck/should_fail/T20666.stderr - testsuite/tests/typecheck/should_fail/T20666a.stderr - testsuite/tests/typecheck/should_fail/T20666b.stderr - testsuite/tests/typecheck/should_fail/T22912.stderr - testsuite/tests/typecheck/should_fail/T23427.stderr - + testsuite/tests/typecheck/should_fail/T26255a.hs - + testsuite/tests/typecheck/should_fail/T26255a.stderr - + testsuite/tests/typecheck/should_fail/T26255b.hs - + testsuite/tests/typecheck/should_fail/T26255b.stderr - + testsuite/tests/typecheck/should_fail/T26255c.hs - + testsuite/tests/typecheck/should_fail/T26255c.stderr - testsuite/tests/typecheck/should_fail/UnliftedNewtypesFamilyKindFail2.stderr - testsuite/tests/typecheck/should_fail/all.T The diff was not included because it is too large. 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