Sven Tennie pushed to branch wip/supersven/correctly_propagate_host-build-target at Glasgow Haskell Compiler / GHC Commits: cf942119 by Cheng Shao at 2026-03-30T15:24:37-04:00 ghc-boot: remove unused SizedSeq instances and functions This commit removes unused `SizedSeq` instances and functions, only keeping the bits we need for hpc tick sequence for now. - - - - - 22c5b7cc by Cheng Shao at 2026-03-30T15:24:38-04:00 ghci: remove unused GHCi.BinaryArray This patch removes the unused `GHCi.BinaryArray` module from `ghci`. Closes #27108. - - - - - 77abb4ab by Cheng Shao at 2026-03-30T15:25:21-04:00 testsuite: mark T17912 as fragile on Windows T17912 is still fragile on Windows, it sometimes unexpectedly pass in CI. This especially strains our already scarce Windows CI runner resources. Mark it as fragile on Windows for the time being. - - - - - d741a6cc by Andreas Klebinger at 2026-03-31T04:39:33-04:00 Bump minimum shake version for hadrian. We also add the shake version we want to stack.yaml Fixes #26884 - - - - - 5e556f9e by Vladislav Zavialov at 2026-03-31T04:40:16-04:00 Status check for the HsType~HsExpr refactoring (#25121) Add a test case to track the status of a refactoring project within GHC whose goal is to arrive at the following declaration: type HsType = HsExpr The rationale for this is to increase code reuse between the term- and type-level code in the compiler front-end (AST, parser, renamer, type checker). The status report is saved to testsuite/tests/ghc-api/T25121_status.stdout and provides useful insights into what needs to happen to make progress on the ticket. - - - - - acffb1b1 by fendor at 2026-03-31T04:41:02-04:00 Extract Binary instances to `GHC.ByteCode.Binary` - - - - - e2ea8e25 by fendor at 2026-03-31T04:41:02-04:00 Add `seqNonEmpty` for evaluating `NonEmpty a` - - - - - 048b00b7 by fendor at 2026-03-31T04:41:02-04:00 Record `LinkableUsage` instead of `Linkable` in `LoaderState` Retaining a ByteCode `Linkable` after it has been loaded retains its `UnlinkedBCO`, keeping it alive for the remainder of the program. This starts accumulating a lot of `UnlinkedBCO` and memory over time. However, the `Linkable` is merely used to later record its usage in `mkObjectUsage`, which is used for recompilation checking. However, this is incorrect, as the interface file and bytecode objects could be in different states, e.g. the interface changes, but the bytecode library hasn't changed so we don't need to recompile and vice versa. By computing a `Fingerprint` for the `ModuleByteCode`, and recording it in the `LinkableUsage`, we know precisely whether the `ByteCode` object on disk is outdated. Thus, parts of this commit just makes sure that we efficiently compute a `Fingerprint` for `ModuleByteCode` and store it in the on-disk representation of `ModuleByteCode`. We change the `LoaderState` to retain `LinkableUsage`, which is smaller representation of a `Linkable`. This allows us to free the unneeded fields of `Linkable` after linking them. We declare the following memory invariants that this commit implements: * No `LinkablePart` should be retained from `LoaderState`. * `Linkable`s should be unloaded after they have been loaded. These invariants are unfortunately tricky to automatically uphold, so we are simply documenting our assumptions for now. We introduce the `linkable-space` test which makes sure that after loading, no `DotGBC` or `UnlinkedBCO` is retained. ------------------------- Metric Increase: MultiLayerModulesTH_OneShot ------------------------- We allocate a bit more, but the peak number of bytes doesn't change. While a bit unfortunate, accepting the metric increase. We add multiple new performance measurements where we were able to observe the desired memory invariants. Further, we add regression tests to validate that the recompilation checker behaves more correct than before. - - - - - 2d1c1997 by Simon Jakobi at 2026-03-31T04:41:46-04:00 Eliminate dictionary-passing in ListMap operations Mark the ListMap helpers 'INLINABLE' so importing modules can specialise the 'TrieMap (ListMap m)' methods and avoid recursive dictionary-passing. See Note [Making ListMap operations specialisable]. Fixes #27097 - - - - - ed2c6570 by Cheng Shao at 2026-03-31T04:42:33-04:00 testsuite: fix testdir cleanup logic on Windows testdir cleanup is unreliable on Windows (#13162) and despite existing hacks in the driver, new failure mode has occurred. This patch makes it print the warning and carry on when failed to clean up a testdir, instead of reporting a spurious framework failure. See added comment for detailed explanation. - - - - - d9388e29 by Simon Jakobi at 2026-03-31T13:14:59-04:00 Add regression test for #18177 Closes #18177. Assisted-by: Codex - - - - - 6a10045c by mangoiv at 2026-03-31T13:15:43-04:00 ci: allow metric decrease for two tests on i386 There has been a nightly failure on i386 due to a compiler runtime improvement on i386 debian 12. We allow that. Metric Decrease (test_env='i386-linux-deb12'): T12707 T8095 - - - - - 7fbb4fcb by Rodrigo Mesquita at 2026-04-01T12:16:33+00:00 Bump default language edition to GHC2024 As per the accepted ghc-proposal#632 Fixes #26039 - - - - - 5ae43275 by Peng Fan at 2026-04-01T19:01:06-04:00 NCG/LA64: add cmpxchg and xchg primops And append some new instructions for LA664 uarch. Apply fix to cmpxchg-prim by Andreas Klebinger. Suggestions in https://gitlab.haskell.org/ghc/ghc/-/merge_requests/15515 - - - - - 8f95534a by Duncan Coutts at 2026-04-01T19:01:52-04:00 Remove signal-based ticker implementations Fixes issue #27073 All supported platforms should work with the pthreads + nanosleep based ticker implementation. This avoids all the problems with using signals. In practice, all supported platforms were probably using the non-signal tickers already, which is probably why we do not get lots of reports about deadlocks and other weirdness: we were definately using functions that are not async signal safe in the tick handler (such as fflush to flussh the eventlog). Only Solaris was explicitly using the timer_create ticker impl, and even Solaris could probably use the pthreads one (if anyone cared: Solaris is no longer a Teir 3 supported platform). Plausibly the only supported platform that this will change will be AIX, which should now use the pthreads impl. - - - - - 51b32b0d by Duncan Coutts at 2026-04-01T19:01:52-04:00 Tidy up some timer/ticker comments elsewhere - - - - - 7562bcd7 by Duncan Coutts at 2026-04-01T19:01:52-04:00 Remove now-unused install_vtalrm_handler Support function used by both of the signal-based ticker implementations. - - - - - 6da127c7 by Duncan Coutts at 2026-04-01T19:01:52-04:00 No longer probe for timer_create in rts/configure It was only used by the TimerCreate.c ticker impl. - - - - - 3fd490fa by Duncan Coutts at 2026-04-01T19:01:53-04:00 Note that rtsTimerSignal is deprecated. - - - - - 63099b0f by Simon Jakobi at 2026-04-01T19:02:39-04:00 Add perf test for #13960 Closes #13960. - - - - - 58009c14 by Apoorv Ingle at 2026-04-02T09:51:24+01:00 Streamline expansions using HsExpansion (#25001) Notes added [Error Context Stack] [Typechecking by expansion: overview] Notes updated Note [Expanding HsDo with XXExprGhcRn] [tcApp: typechecking applications] ------------------------- Metric Decrease: T9020 ------------------------- There are 2 key changes: 1. `HsExpand` datatype mediates between expansions 2. Replace `ErrCtxtM` to a simpler `HsCtxt` that does not depend on a `TidyEnv` This has some consequences detailed below: 1. `HsExpand` datatype mediates between expansions * Simplifies the implementations of `tcExpr` to work on `XExpr` * Removes `VACtxt` (and its associated `VAExpansion` and `VACall`) datatype, it is subsumed by simply a `SrcSpan`. * Removes the function `addHeadCtxt` as it is now mearly setting a location * The function `tcValArgs` does its own argument number management * move `splitHsTypes` out of `tcApp` * Removes special case of tcBody from `tcLambdaMatches` * Removes special case of `dsExpr` for `ExpandedThingTc` * Renames `tcMonoExpr` -> `tcMonoLExpr`, `tcMonoExprNC` -> `tcMonoLExpr` * Renames `EValArg`, `EValArgQL` fields: `ea_ctxt` -> `ea_loc_span` and `eaql_ctx` -> `eaql_loc_span` * Remove `PopErrCtxt` from `XXExprGhcRn` * `fun_orig` in tcInstFun depends on the SrcSpan of the head of the application chain (similar to addArgCtxt) - it references the application chain head if it is user located, or uses the error context stack as a fallback if it's a generated location * Make a new variant `GeneratedSrcSpan` in `SrcSpan` for HIEAst Nodes - Expressions wrapped around `GeneratedSrcSpan` are ignored and never added to the error context stack - In Explicit list expansion `fromListN` is wrapped with a `GeneratedSrcSpan` with `GeneratedSrcSpanDetails` field to store the original srcspan 2. Replace `ErrCtxtM` to a simpler `HsCtxt` that does not depend on a `TidyEnv` * Merge `HsThingRn` to `HsCtxt` * Landmark Error messages are now just computed on the fly * Make HsExpandedRn and HsExpandedTc payload a located HsExpr GhcRn * `HsCtxt` are tidied and zonked at the end right before printing Co-authored-by: simonpj - - - - - bc4b4487 by Zubin Duggal at 2026-04-03T14:22:27-04:00 driver: recognise .dyn_o as a valid object file to link if passed on the command line. This allows plugins compiled with this suffix to run. Fixes #24486 - - - - - 5ebb9121 by Simon Jakobi at 2026-04-03T14:23:11-04:00 Add regression test for #16145 Closes #16145. - - - - - c1fc1c44 by Simon Peyton Jones at 2026-04-03T19:56:07-04:00 Refactor eta-expansion in Prep The Prep pass does eta-expansion but I found cases where it was doing bad things. So I refactored and simplified it quite a bit. In the new design * There is no distinction between `rhs` and `body`; in particular, lambdas can now appear anywhere, rather than just as the RHS of a let-binding. * This change led to a significant simplification of Prep, and a more straightforward explanation of eta-expansion. See the new Note [Eta expansion] * The consequences is that CoreToStg needs to handle naked lambdas. This is very easy; but it does need a unique supply, which forces some simple refactoring. Having a unique supply to hand is probably a good thing anyway. - - - - - 21beda2c by Simon Peyton Jones at 2026-04-03T19:56:07-04:00 Clarify Note [Interesting dictionary arguments] Ticket #26831 ended up concluding that the code for GHC.Core.Opt.Specialise.interestingDict was good, but the commments were a bit inadequate. This commit improves the comments slightly. - - - - - 3eaac1f2 by Simon Peyton Jones at 2026-04-03T19:56:07-04:00 Make inlining a bit more eager for overloaded functions If we have f d = ... (class-op d x y) ... we should be eager to inline `f`, because that may change the higher order call (class-op d x y) into a call to a statically known function. See the discussion on #26831. Even though this does a bit /more/ inlining, compile times decrease by an average of 0.4%. Compile time changes: DsIncompleteRecSel3(normal) 431,786,104 -2.2% ManyAlternatives(normal) 670,883,768 -1.6% ManyConstructors(normal) 3,758,493,832 -2.6% GOOD MultilineStringsPerf(normal) 29,900,576 -2.8% T14052Type(ghci) 1,047,600,848 -1.2% T17836(normal) 392,852,328 -5.2% T18478(normal) 442,785,768 -1.4% T21839c(normal) 341,536,992 -14.1% GOOD T3064(normal) 174,086,152 +5.3% BAD T5631(normal) 506,867,800 +1.0% hard_hole_fits(normal) 209,530,736 -1.3% info_table_map_perf(normal) 19,523,093,184 -1.2% parsing001(normal) 377,810,528 -1.1% pmcOrPats(normal) 60,075,264 -0.5% geo. mean -0.4% minimum -14.1% maximum +5.3% Runtime changes haddock.Cabal(normal) 27,351,988,792 -0.7% haddock.base(normal) 26,997,212,560 -0.6% haddock.compiler(normal) 219,531,332,960 -1.0% Metric Decrease: LinkableUsage01 ManyConstructors T17949 T21839c T13035 TcPlugin_RewritePerf hard_hole_fits Metric Increase: T3064 - - - - - 5cbc2c82 by Matthew Pickering at 2026-04-03T19:57:02-04:00 bytecode: Add magic header/version to bytecode files In order to avoid confusing errors when using stale interface files (ie from an older compiler version), we add a simple header/version check like the one for interface files. Fixes #27068 - - - - - d95a1936 by fendor at 2026-04-03T19:57:02-04:00 Add constants for bytecode in-memory buffer size Introduce a common constant for the default size of the .gbc and .bytecodelib binary buffer. The buffer is by default set to 1 MB. - - - - - b822c30a by mangoiv at 2026-04-03T19:57:49-04:00 testsuite: filter stderr for static001 on darwin This reactivates the test on x86_64 darwin as this should have been done long ago and ignores warnings emitted by ranlib on newer version of the darwin toolchain since they are benign. (no symbols for stub libraries) Fixes #27116 - - - - - 28ce1f8a by Andreas Klebinger at 2026-04-03T19:58:44-04:00 Give the Data instance for ModuleName a non-bottom toConstr implementation. I've also taken the liberty to add Note [Data.Data instances for GHC AST Types] describing some of the uses of Data.Data I could find. Fixes #27129 - - - - - 8ca41ffe by mangoiv at 2026-04-03T19:59:30-04:00 issue template: fix add bug label - - - - - 3981db0c by Sylvain Henry at 2026-04-03T20:00:33-04:00 Add more canned GC functions for common register patterns (#27142) Based on analysis of heap-check sites across the GHC compiler and Cabal, the following patterns were not covered by existing canned GC functions but occurred frequently enough to warrant specialisation: stg_gc_ppppp -- 5 GC pointers stg_gc_ip -- unboxed word + GC pointer stg_gc_pi -- GC pointer + unboxed word stg_gc_ii -- two unboxed words stg_gc_bpp -- byte (I8) + two GC pointers Adding these reduces the fraction of heap-check sites falling back to the generic GC path from ~1.4% to ~0.4% when compiling GHC itself. Co-Authored-By: Claude Sonnet 4.6 - - - - - d17d1435 by Matthew Pickering at 2026-04-03T20:01:19-04:00 Make home unit dependencies stored as sets Co-authored-by: Wolfgang Jeltsch - - - - - 92a97015 by Simon Peyton Jones at 2026-04-05T00:58:57+01:00 Add Invariant (NoTypeShadowing) to Core This commit addresses #26868, by adding a new invariant (NoTypeShadowing) to Core. See Note [No type-shadowing in Core] in GHC.Core - - - - - 8b5a5020 by Simon Peyton Jones at 2026-04-05T00:58:57+01:00 Major refactor of free-variable functions For some time we have had two free-variable mechanims for types: * The "FV" mechanism, embodied in GHC.Utils.FV, which worked OK, but was fragile where eta-expansion was concerned. * The TyCoFolder mechanism, using a one-shot EndoOS accumulator I finally got tired of this and refactored the whole thing, thereby addressing #27080. Now we have * `GHC.Types.Var.FV`, which has a composable free-variable result type, very much in the spirit of the old `FV`, but much more robust. (It uses the "one shot trick".) * GHC.Core.TyCo.FVs now has just one technology for free variables. All this led to a lot of renaming. There are couple of error-message changes. The change in T18451 makes an already-poor error message even more mysterious. But it really needs a separate look. We also now traverse the AST in a different order leading to a different but still deterministic order for FVs and test output has been adjusted accordingly. - - - - - 4bf040c6 by sheaf at 2026-04-05T14:56:29-04:00 Add utility pprTrace_ function This function is useful for quick debugging, as it can be added to a where clause to pretty-print debugging information: fooBar x y | cond = body1 | otherwise = body2 where !_ = pprTrace_ "fooBar" $ vcat [ text "x:" <+> ppr x , text "y:" <+> ppr y , text "cond:" <+> ppr cond ] - - - - - ed734539 by Matthew Pickering at 2026-04-07T05:36:42+00:00 packaging: correctly propagate build/host/target to bindist configure script At the moment the host and target which we will produce a compiler for is fixed at the initial configure time. Therefore we need to persist the choice made at this time into the installation bindist as well so we look for the right tools, with the right prefixes at install time. In the future, we want to provide a bit more control about what kind of bindist we produce so the logic about what the host/target will have to be written by hadrian rather than persisted by the configure script. In particular with cross compilers we want to either build a normal stage 2 cross bindist or a stage 3 bindist, which creates a bindist which has a native compiler for the target platform. Fixes #21970 Co-authored-by: Sven Tennie - - - - - 1e1f4048 by Sven Tennie at 2026-04-07T05:36:42+00:00 Cross --host and --target no longer required for cross (#21970) We set sane defaults in the configure script. Thus, these paramenters aren't required any longer. - - - - - f9e70b7d by Sven Tennie at 2026-04-07T05:36:42+00:00 ci: Define USER_CONF_CC_OPTS_STAGE2 for aarch64/mingw ghc-toolchain doesn't see $CONF_CC_OPTS_STAGE2 when the bindist gets configured. So, the hack to override the compiler gets lost. - - - - - 423 changed files: - .gitlab/ci.sh - .gitlab/generate-ci/gen_ci.hs - .gitlab/issue_templates/default.md - .gitlab/jobs.yaml - compiler/GHC.hs - compiler/GHC/Builtin/PrimOps.hs - + compiler/GHC/ByteCode/Binary.hs - + compiler/GHC/ByteCode/Recomp/Binary.hs - compiler/GHC/ByteCode/Serialize.hs - compiler/GHC/CmmToAsm/LA64/CodeGen.hs - compiler/GHC/CmmToAsm/LA64/Instr.hs - compiler/GHC/CmmToAsm/LA64/Ppr.hs - compiler/GHC/Core.hs - compiler/GHC/Core/Coercion.hs - compiler/GHC/Core/FVs.hs - compiler/GHC/Core/Lint.hs - compiler/GHC/Core/Opt/Arity.hs - compiler/GHC/Core/Opt/DmdAnal.hs - compiler/GHC/Core/Opt/SetLevels.hs - compiler/GHC/Core/Opt/Specialise.hs - compiler/GHC/Core/Rules.hs - compiler/GHC/Core/Subst.hs - compiler/GHC/Core/Tidy.hs - compiler/GHC/Core/TyCo/FVs.hs - compiler/GHC/Core/TyCo/Rep.hs - compiler/GHC/Core/TyCo/Subst.hs - compiler/GHC/Core/Type.hs - compiler/GHC/Core/Unfold.hs - compiler/GHC/Core/Unify.hs - compiler/GHC/CoreToStg.hs - compiler/GHC/CoreToStg/Prep.hs - compiler/GHC/Data/TrieMap.hs - compiler/GHC/Driver/Flags.hs - compiler/GHC/Driver/Hooks.hs - compiler/GHC/Driver/Main.hs - compiler/GHC/Driver/Phases.hs - compiler/GHC/Driver/Pipeline.hs - compiler/GHC/Driver/Plugins.hs - compiler/GHC/Hs/DocString.hs - compiler/GHC/Hs/Expr.hs - compiler/GHC/Hs/Expr.hs-boot - compiler/GHC/Hs/Instances.hs - compiler/GHC/Hs/Syn/Type.hs - compiler/GHC/Hs/Utils.hs - compiler/GHC/HsToCore/Binds.hs - compiler/GHC/HsToCore/Expr.hs - compiler/GHC/HsToCore/Match.hs - compiler/GHC/HsToCore/Monad.hs - compiler/GHC/HsToCore/Pmc.hs - compiler/GHC/HsToCore/Quote.hs - compiler/GHC/HsToCore/Ticks.hs - compiler/GHC/HsToCore/Usage.hs - compiler/GHC/Iface/Ext/Ast.hs - compiler/GHC/Iface/Ext/Utils.hs - compiler/GHC/Iface/Recomp.hs - compiler/GHC/Iface/Recomp/Types.hs - compiler/GHC/Iface/Syntax.hs - compiler/GHC/Linker/ByteCode.hs - compiler/GHC/Linker/Deps.hs - compiler/GHC/Linker/Loader.hs - compiler/GHC/Linker/Types.hs - compiler/GHC/Parser/HaddockLex.x - compiler/GHC/Rename/Bind.hs - compiler/GHC/Rename/Env.hs - compiler/GHC/Rename/Expr.hs - compiler/GHC/Rename/Expr.hs-boot - compiler/GHC/Rename/HsType.hs - compiler/GHC/Rename/Lit.hs - compiler/GHC/Rename/Module.hs - compiler/GHC/Rename/Names.hs - compiler/GHC/Rename/Pat.hs - compiler/GHC/Rename/Splice.hs - compiler/GHC/Rename/Splice.hs-boot - compiler/GHC/Rename/Utils.hs - compiler/GHC/Runtime/Debugger/Breakpoints.hs - compiler/GHC/Runtime/Loader.hs - compiler/GHC/Stg/Lint.hs - compiler/GHC/StgToCmm/Heap.hs - compiler/GHC/Tc/Deriv.hs - compiler/GHC/Tc/Deriv/Infer.hs - compiler/GHC/Tc/Deriv/Utils.hs - compiler/GHC/Tc/Errors.hs - compiler/GHC/Tc/Errors/Hole.hs - compiler/GHC/Tc/Errors/Ppr.hs - compiler/GHC/Tc/Errors/Types.hs - compiler/GHC/Tc/Gen/App.hs - compiler/GHC/Tc/Gen/Bind.hs - compiler/GHC/Tc/Gen/Do.hs - + compiler/GHC/Tc/Gen/Expand.hs - compiler/GHC/Tc/Gen/Export.hs - compiler/GHC/Tc/Gen/Expr.hs - compiler/GHC/Tc/Gen/Expr.hs-boot - compiler/GHC/Tc/Gen/Head.hs - compiler/GHC/Tc/Gen/HsType.hs - compiler/GHC/Tc/Gen/Match.hs - compiler/GHC/Tc/Gen/Match.hs-boot - compiler/GHC/Tc/Gen/Pat.hs - compiler/GHC/Tc/Gen/Sig.hs - compiler/GHC/Tc/Gen/Splice.hs - compiler/GHC/Tc/Instance/Class.hs - compiler/GHC/Tc/Instance/Family.hs - compiler/GHC/Tc/Instance/FunDeps.hs - compiler/GHC/Tc/Module.hs - compiler/GHC/Tc/Solver/Solve.hs - compiler/GHC/Tc/TyCl.hs - compiler/GHC/Tc/TyCl/Class.hs - compiler/GHC/Tc/TyCl/Instance.hs - compiler/GHC/Tc/TyCl/PatSyn.hs - compiler/GHC/Tc/TyCl/Utils.hs - compiler/GHC/Tc/Types.hs - compiler/GHC/Tc/Types/BasicTypes.hs - compiler/GHC/Tc/Types/Constraint.hs - compiler/GHC/Tc/Types/CtLoc.hs - compiler/GHC/Tc/Types/ErrCtxt.hs - compiler/GHC/Tc/Types/Evidence.hs - compiler/GHC/Tc/Types/LclEnv.hs - compiler/GHC/Tc/Types/Origin.hs - compiler/GHC/Tc/Types/Origin.hs-boot - compiler/GHC/Tc/Utils/Instantiate.hs - compiler/GHC/Tc/Utils/Monad.hs - compiler/GHC/Tc/Utils/TcMType.hs - compiler/GHC/Tc/Utils/TcType.hs - compiler/GHC/Tc/Utils/TcType.hs-boot - compiler/GHC/Tc/Utils/Unify.hs - compiler/GHC/Tc/Validity.hs - compiler/GHC/Tc/Zonk/TcType.hs - compiler/GHC/Tc/Zonk/Type.hs - compiler/GHC/Types/Error.hs - + compiler/GHC/Types/Error.hs-boot - compiler/GHC/Types/Hint/Ppr.hs - compiler/GHC/Types/Id.hs - compiler/GHC/Types/Id/Info.hs - compiler/GHC/Types/Name/Reader.hs - compiler/GHC/Types/Name/Set.hs - compiler/GHC/Types/SrcLoc.hs - + compiler/GHC/Types/Var/FV.hs - compiler/GHC/Types/Var/Set.hs - compiler/GHC/Unit/Finder.hs - compiler/GHC/Unit/Home/Graph.hs - compiler/GHC/Unit/Home/ModInfo.hs - compiler/GHC/Unit/Module/Deps.hs - compiler/GHC/Unit/Module/Status.hs - compiler/GHC/Unit/State.hs - + compiler/GHC/Unit/State.hs-boot - compiler/GHC/Utils/Binary.hs - compiler/GHC/Utils/EndoOS.hs - − compiler/GHC/Utils/FV.hs - compiler/GHC/Utils/Logger.hs - compiler/GHC/Utils/Misc.hs - compiler/GHC/Utils/Trace.hs - compiler/Language/Haskell/Syntax/Module/Name.hs - compiler/ghc.cabal.in - configure.ac - distrib/configure.ac.in - docs/users_guide/exts/control.rst - ghc/GHCi/Leak.hs - 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