- ghc-commits - Haskell.org

[Git][ghc/ghc][wip/deepseq-primop] 14 commits: base: don't expose GHC.Num.{BigNat, Integer, Natural}
by Cheng Shao (＠TerrorJack) 21 Jan '26

21 Jan '26

Cheng Shao pushed to branch wip/deepseq-primop at Glasgow Haskell Compiler / GHC Commits: 30f442a9 by Teo Camarasu at 2026-01-20T13:57:26-05:00 base: don't expose GHC.Num.{BigNat, Integer, Natural} We no longer expose GHC.Num.{BigNat, Integer, Natural} from base instead users should get these modules from ghc-bignum. We make this change to insulate end users from changes to GHC's implementation of big numbers. Implements CLC proposal 359: https://github.com/haskell/core-libraries-committee/issues/359 - - - - - 75a9053d by Teo Camarasu at 2026-01-20T13:58:07-05:00 base: deprecate GHC internals in GHC.Num Implements CLC proposal: https://github.com/haskell/core-libraries-committee/issues/360 - - - - - 9534b032 by Andreas Klebinger at 2026-01-20T13:58:50-05:00 ghc-experimental: Update Changelog I tried to reconstruct a high level overview of the changes and when they were made since we introduced it. Fixes #26506 Co-authored-by: Teo Camarasu <teofilcamarasu(a)gmail.com> - - - - - 346f2f5a by Cheng Shao at 2026-01-20T13:59:30-05:00 hadrian: remove RTS options in ghc-in-ghci flavour This patch removes the RTS options passed to ghc in ghc-in-ghci flavour, to workaround command line argument handling issue in hls/hie-boot that results in `-O64M` instead of `+RTS -O64M -RTS` being passed to ghc. It's not a hadrian bug per se, since ghc's own ghc-in-ghci multi repl works fine, but we should still make sure HLS works. Closes #26801. - - - - - 759fd15a by Andreas Klebinger at 2026-01-21T16:05:28-05:00 Don't build GHC with -Wcompat Without bumping the boot compiler the warnings it produces are often not actionable leading to pointless noise. Fixes #26800 - - - - - 3172db94 by Torsten Schmits at 2026-01-21T16:06:11-05:00 Use the correct field of ModOrigin when formatting error message listing hidden reexports - - - - - 485c12b2 by Cheng Shao at 2026-01-21T16:06:54-05:00 Revert "hadrian: handle findExecutable "" gracefully" This reverts commit 1e5752f64a522c4025365856d92f78073a7b3bba. The underlying issue has been fixed in https://github.com/haskell/directory/commit/75828696e7145adc09179111a0d631b… and present since 1.3.9.0, and hadrian directory lower bound is 1.3.9.0, so we can revert our own in house hack now. - - - - - 5efb58dc by Cheng Shao at 2026-01-21T16:07:36-05:00 rts: fix typo in TICK_ALLOC_RTS This patch fixes a typo in the `TICK_ALLOC_RTS` macro, the original `bytes` argument was silently dropped. The Cmm code has its own version of `TICK_ALLOC_RTS` not affected by this typo, it affected the C RTS, and went unnoticed because the variable `n` happened to also be available at its call site. But the number was incorrect. Also fixes its call site since `WDS()` is not available in C. - - - - - c406ea69 by Cheng Shao at 2026-01-21T16:07:36-05:00 rts: remove broken & unused ALLOC_P_TICKY This patch removes the `ALLOC_P_TICKY` macro from the rts, it's unused, and its expanded code is already broken. - - - - - 34a27e20 by Simon Peyton Jones at 2026-01-21T16:08:17-05:00 Make the implicit-parameter class have representational role This MR addresses #26737, by making the built-in class IP have a representational role for its second parameter. See Note [IP: implicit parameter class] in ghc-internal:GHC.Internal.Classes.IP In fact, IP is (unfortunately, currently) exposed by base:GHC.Base, so we ran a quick CLC proposal to agree the change: https://github.com/haskell/core-libraries-committee/issues/385 Some (small) compilations get faster because they only need to load (small) interface file GHC.Internal.Classes.IP.hi, rather than (large) GHC.Internal.Classes.hi. Metric Decrease: T10421 T12150 T12425 T24582 T5837 T5030 - - - - - ca79475f by Cheng Shao at 2026-01-21T16:09:00-05:00 testsuite: avoid re.sub in favor of simple string replacements This patch refactors the testsuite driver and avoids the usage of re.sub in favor of simple string replacements when possible. The changes are not comprehensive, and there are still a lot of re.sub usages lingering around the tree, but this already addresses a major performance bottleneck in the testsuite driver that might has to do with quadratic or worse slowdown in cpython's regular expression engine when handling certain regex patterns with large strings. Especially on i386, and i386 jobs are the bottlenecks of all full-ci validate pipelines! Here are the elapsed times of testing x86_64/i386 with -j48 before this patch: x86_64: `Build completed in 6m06s` i386: `Build completed in 1h36m` And with this patch: x86_64: `Build completed in 4m55s` i386: `Build completed in 4m23s` Fixes #26786. Co-authored-by: Codex <codex(a)openai.com> - - - - - 88c93796 by Zubin Duggal at 2026-01-21T16:09:42-05:00 ghc-toolchain: Also configure windres on non-windows platforms. It may be needed for cross compilation. Fixes #24588 - - - - - 9788c0ec by Cheng Shao at 2026-01-21T16:10:24-05:00 ghci: print external interpreter trace messages to stderr instead of stdout This patch makes ghci print external interpreter trace messages to stderr instead of stdout, which is a much saner choice for diagnostic information. Closes #26807. - - - - - cc7f670c by Cheng Shao at 2026-01-21T23:56:02+01:00 WIP - - - - - 48 changed files: - compiler/GHC/Builtin/Names.hs - compiler/GHC/Unit/State.hs - compiler/ghc.cabal.in - docs/users_guide/9.16.1-notes.rst - hadrian/src/Hadrian/Utilities.hs - hadrian/src/Rules/Docspec.hs - hadrian/src/Rules/Lint.hs - hadrian/src/Settings/Builders/Ghc.hs - hadrian/src/Settings/Builders/RunTest.hs - hadrian/src/Settings/Flavours/GhcInGhci.hs - libraries/base/base.cabal.in - libraries/base/changelog.md - libraries/base/src/Data/Array/Byte.hs - libraries/base/src/GHC/Num.hs - − libraries/base/src/GHC/Num/BigNat.hs - − libraries/base/src/GHC/Num/Integer.hs - − libraries/base/src/GHC/Num/Natural.hs - libraries/base/src/System/CPUTime/Utils.hs - libraries/ghc-bignum/ghc-bignum.cabal - libraries/ghc-experimental/CHANGELOG.md - + libraries/ghc-experimental/cbits/DeepSeq.cmm - libraries/ghc-experimental/ghc-experimental.cabal.in - + libraries/ghc-experimental/src/GHC/DeepSeq.hs - libraries/ghc-experimental/src/GHC/TypeNats/Experimental.hs - libraries/ghc-internal/ghc-internal.cabal.in - libraries/ghc-internal/src/GHC/Internal/Classes.hs - + libraries/ghc-internal/src/GHC/Internal/Classes/IP.hs - libraries/ghci/GHCi/Server.hs - rts/include/Cmm.h - rts/include/stg/Ticky.h - rts/sm/Storage.c - testsuite/driver/runtests.py - testsuite/driver/testlib.py - testsuite/driver/testutil.py - testsuite/tests/interface-stability/base-exports.stdout - testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs - testsuite/tests/interface-stability/base-exports.stdout-mingw32 - testsuite/tests/interface-stability/base-exports.stdout-ws-32 - testsuite/tests/interface-stability/ghc-experimental-exports.stdout - testsuite/tests/interface-stability/ghc-prim-exports.stdout - testsuite/tests/interface-stability/ghc-prim-exports.stdout-mingw32 - + testsuite/tests/primops/should_run/DeepSeqPrimOp.hs - + testsuite/tests/primops/should_run/DeepSeqPrimOp.stdout - testsuite/tests/primops/should_run/all.T - testsuite/tests/th/TH_implicitParams.stdout - + testsuite/tests/typecheck/should_compile/T26737.hs - testsuite/tests/typecheck/should_compile/all.T - utils/ghc-toolchain/exe/Main.hs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/c1a8508d9d9cf3a2e3ffbdc33c459f… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/c1a8508d9d9cf3a2e3ffbdc33c459f… You're receiving this email because of your account on gitlab.haskell.org.

1 0

[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 12 commits: Don't build GHC with -Wcompat
by Marge Bot (＠marge-bot) 21 Jan '26

21 Jan '26

Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC Commits: 759fd15a by Andreas Klebinger at 2026-01-21T16:05:28-05:00 Don't build GHC with -Wcompat Without bumping the boot compiler the warnings it produces are often not actionable leading to pointless noise. Fixes #26800 - - - - - 3172db94 by Torsten Schmits at 2026-01-21T16:06:11-05:00 Use the correct field of ModOrigin when formatting error message listing hidden reexports - - - - - 485c12b2 by Cheng Shao at 2026-01-21T16:06:54-05:00 Revert "hadrian: handle findExecutable "" gracefully" This reverts commit 1e5752f64a522c4025365856d92f78073a7b3bba. The underlying issue has been fixed in https://github.com/haskell/directory/commit/75828696e7145adc09179111a0d631b… and present since 1.3.9.0, and hadrian directory lower bound is 1.3.9.0, so we can revert our own in house hack now. - - - - - 5efb58dc by Cheng Shao at 2026-01-21T16:07:36-05:00 rts: fix typo in TICK_ALLOC_RTS This patch fixes a typo in the `TICK_ALLOC_RTS` macro, the original `bytes` argument was silently dropped. The Cmm code has its own version of `TICK_ALLOC_RTS` not affected by this typo, it affected the C RTS, and went unnoticed because the variable `n` happened to also be available at its call site. But the number was incorrect. Also fixes its call site since `WDS()` is not available in C. - - - - - c406ea69 by Cheng Shao at 2026-01-21T16:07:36-05:00 rts: remove broken & unused ALLOC_P_TICKY This patch removes the `ALLOC_P_TICKY` macro from the rts, it's unused, and its expanded code is already broken. - - - - - 34a27e20 by Simon Peyton Jones at 2026-01-21T16:08:17-05:00 Make the implicit-parameter class have representational role This MR addresses #26737, by making the built-in class IP have a representational role for its second parameter. See Note [IP: implicit parameter class] in ghc-internal:GHC.Internal.Classes.IP In fact, IP is (unfortunately, currently) exposed by base:GHC.Base, so we ran a quick CLC proposal to agree the change: https://github.com/haskell/core-libraries-committee/issues/385 Some (small) compilations get faster because they only need to load (small) interface file GHC.Internal.Classes.IP.hi, rather than (large) GHC.Internal.Classes.hi. Metric Decrease: T10421 T12150 T12425 T24582 T5837 T5030 - - - - - ca79475f by Cheng Shao at 2026-01-21T16:09:00-05:00 testsuite: avoid re.sub in favor of simple string replacements This patch refactors the testsuite driver and avoids the usage of re.sub in favor of simple string replacements when possible. The changes are not comprehensive, and there are still a lot of re.sub usages lingering around the tree, but this already addresses a major performance bottleneck in the testsuite driver that might has to do with quadratic or worse slowdown in cpython's regular expression engine when handling certain regex patterns with large strings. Especially on i386, and i386 jobs are the bottlenecks of all full-ci validate pipelines! Here are the elapsed times of testing x86_64/i386 with -j48 before this patch: x86_64: `Build completed in 6m06s` i386: `Build completed in 1h36m` And with this patch: x86_64: `Build completed in 4m55s` i386: `Build completed in 4m23s` Fixes #26786. Co-authored-by: Codex <codex(a)openai.com> - - - - - 88c93796 by Zubin Duggal at 2026-01-21T16:09:42-05:00 ghc-toolchain: Also configure windres on non-windows platforms. It may be needed for cross compilation. Fixes #24588 - - - - - 9788c0ec by Cheng Shao at 2026-01-21T16:10:24-05:00 ghci: print external interpreter trace messages to stderr instead of stdout This patch makes ghci print external interpreter trace messages to stderr instead of stdout, which is a much saner choice for diagnostic information. Closes #26807. - - - - - 5cb04c06 by Sylvain Henry at 2026-01-21T16:43:37-05:00 GC: don't use CAS without PARALLEL_GC on If we're not using the parallel GC, there is no reason to do a costly CAS. This was flagged as taking time in a perf profile. - - - - - 6d90a305 by Sylvain Henry at 2026-01-21T16:43:37-05:00 GC: suffix parallel GC with "par" instead of "thr" Avoid some potential confusion (see discussion in !15351). - - - - - 4cb5b619 by fendor at 2026-01-21T16:43:38-05:00 Remove blanket ignore that covers libraries/ - - - - - 34 changed files: - .gitignore - compiler/GHC/Builtin/Names.hs - compiler/GHC/Unit/State.hs - compiler/ghc.cabal.in - docs/users_guide/9.16.1-notes.rst - hadrian/src/Hadrian/Utilities.hs - hadrian/src/Rules/Docspec.hs - hadrian/src/Rules/Lint.hs - hadrian/src/Settings/Builders/Ghc.hs - hadrian/src/Settings/Builders/RunTest.hs - libraries/ghc-internal/ghc-internal.cabal.in - libraries/ghc-internal/src/GHC/Internal/Classes.hs - + libraries/ghc-internal/src/GHC/Internal/Classes/IP.hs - libraries/ghci/GHCi/Server.hs - rts/include/Cmm.h - rts/include/stg/Ticky.h - rts/rts.cabal - rts/sm/Evac.c - rts/sm/Evac_thr.c → rts/sm/Evac_par.c - rts/sm/Scav_thr.c → rts/sm/Scav_par.c - rts/sm/Storage.c - testsuite/driver/runtests.py - testsuite/driver/testlib.py - testsuite/driver/testutil.py - testsuite/tests/interface-stability/base-exports.stdout - testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs - testsuite/tests/interface-stability/base-exports.stdout-mingw32 - testsuite/tests/interface-stability/base-exports.stdout-ws-32 - testsuite/tests/interface-stability/ghc-prim-exports.stdout - testsuite/tests/interface-stability/ghc-prim-exports.stdout-mingw32 - testsuite/tests/th/TH_implicitParams.stdout - + testsuite/tests/typecheck/should_compile/T26737.hs - testsuite/tests/typecheck/should_compile/all.T - utils/ghc-toolchain/exe/Main.hs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/1e30763b1946dd86473fec65adcdaa… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/1e30763b1946dd86473fec65adcdaa… You're receiving this email because of your account on gitlab.haskell.org.

1 0

[Git][ghc/ghc][master] ghci: print external interpreter trace messages to stderr instead of stdout
by Marge Bot (＠marge-bot) 21 Jan '26

21 Jan '26

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: 9788c0ec by Cheng Shao at 2026-01-21T16:10:24-05:00 ghci: print external interpreter trace messages to stderr instead of stdout This patch makes ghci print external interpreter trace messages to stderr instead of stdout, which is a much saner choice for diagnostic information. Closes #26807. - - - - - 1 changed file: - libraries/ghci/GHCi/Server.hs Changes: ===================================== libraries/ghci/GHCi/Server.hs ===================================== @@ -32,11 +32,12 @@ import Data.Binary import Text.Printf import System.Environment (getProgName, getArgs) import System.Exit +import System.IO type MessageHook = Msg -> IO Msg trace :: String -> IO () -trace s = getProgName >>= \name -> printf "[%20s] %s\n" name s +trace s = getProgName >>= \name -> hPrintf stderr "[%20s] %s\n" name s serv :: Bool -> MessageHook -> Pipe -> (forall a .IO a -> IO a) -> IO () serv verbose hook pipe restore = loop View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/9788c0ecb7288cdcbe067fa90f54ec2… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/9788c0ecb7288cdcbe067fa90f54ec2… You're receiving this email because of your account on gitlab.haskell.org.

1 0

[Git][ghc/ghc][master] ghc-toolchain: Also configure windres on non-windows platforms.
by Marge Bot (＠marge-bot) 21 Jan '26

21 Jan '26

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: 88c93796 by Zubin Duggal at 2026-01-21T16:09:42-05:00 ghc-toolchain: Also configure windres on non-windows platforms. It may be needed for cross compilation. Fixes #24588 - - - - - 1 changed file: - utils/ghc-toolchain/exe/Main.hs Changes: ===================================== utils/ghc-toolchain/exe/Main.hs ===================================== @@ -480,13 +480,8 @@ mkTarget opts = do opt <- optional $ findProgram "opt" (optOpt opts) ["opt"] llvmAs <- optional $ findProgram "llvm assembler" (optLlvmAs opts) ["clang"] - -- Windows-specific utilities - windres <- - case archOS_OS archOs of - OSMinGW32 -> do - windres <- findProgram "windres" (optWindres opts) ["windres"] - return (Just windres) - _ -> return Nothing + -- for windows, also used for cross compiling + windres <- optional $ findProgram "windres" (optWindres opts) ["windres"] -- Darwin-specific utilities (otool, installNameTool) <- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/88c937962212e1b9189f15363794db4… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/88c937962212e1b9189f15363794db4… You're receiving this email because of your account on gitlab.haskell.org.

1 0

[Git][ghc/ghc][master] testsuite: avoid re.sub in favor of simple string replacements
by Marge Bot (＠marge-bot) 21 Jan '26

21 Jan '26

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: ca79475f by Cheng Shao at 2026-01-21T16:09:00-05:00 testsuite: avoid re.sub in favor of simple string replacements This patch refactors the testsuite driver and avoids the usage of re.sub in favor of simple string replacements when possible. The changes are not comprehensive, and there are still a lot of re.sub usages lingering around the tree, but this already addresses a major performance bottleneck in the testsuite driver that might has to do with quadratic or worse slowdown in cpython's regular expression engine when handling certain regex patterns with large strings. Especially on i386, and i386 jobs are the bottlenecks of all full-ci validate pipelines! Here are the elapsed times of testing x86_64/i386 with -j48 before this patch: x86_64: `Build completed in 6m06s` i386: `Build completed in 1h36m` And with this patch: x86_64: `Build completed in 4m55s` i386: `Build completed in 4m23s` Fixes #26786. Co-authored-by: Codex <codex(a)openai.com> - - - - - 3 changed files: - testsuite/driver/runtests.py - testsuite/driver/testlib.py - testsuite/driver/testutil.py Changes: ===================================== testsuite/driver/runtests.py ===================================== @@ -28,7 +28,7 @@ import subprocess import asyncio -from testutil import getStdout, str_warn, str_info, print_table, shorten_metric_name +from testutil import getStdout, str_warn, str_info, print_table, shorten_metric_name, str_removeprefix from testglobals import getConfig, ghc_env, TestConfig, t, \ TestOptions, brokens, PerfMetric from my_typing import TestName @@ -291,7 +291,7 @@ if windows: for line in pkginfo.split('\n'): if line.startswith('library-dirs:'): path = line.rstrip() - path = re.sub('^library-dirs: ', '', path) + path = str_removeprefix(path, 'library-dirs: ') # Use string.replace instead of re.sub, because re.sub # interprets backslashes in the replacement string as # escape sequences. ===================================== testsuite/driver/testlib.py ===================================== @@ -25,7 +25,7 @@ from testglobals import config, ghc_env, default_testopts, brokens, t, \ from testutil import strip_quotes, lndir, link_or_copy_file, passed, \ failBecause, testing_metrics, residency_testing_metrics, \ stable_perf_counters, \ - PassFail, badResult, memoize + PassFail, badResult, memoize, str_removeprefix from term_color import Color, colored import testutil from cpu_features import have_cpu_feature @@ -1792,7 +1792,7 @@ async def do_test(name: TestName, if opts.expect not in ['pass', 'fail', 'missing-lib']: framework_fail(name, way, 'bad expected ' + opts.expect) - directory = re.sub(r'^\.[/\\]', '', str(opts.testdir)) + directory = str_removeprefix(str_removeprefix(str(opts.testdir), './'), '.\\') if way in opts.fragile_ways: if_verbose(1, '*** fragile test %s resulted in %s' % (full_name, 'pass' if result.passed else 'fail')) @@ -1830,7 +1830,7 @@ async def do_test(name: TestName, # if found and instead have the testsuite decide on what to do # with the output. def override_options(pre_cmd): - if config.verbose >= 5 and bool(re.match(r'\$make', pre_cmd, re.I)): + if config.verbose >= 5 and pre_cmd.lower().startswith('$make'): return pre_cmd.replace(' -s' , '') \ .replace('--silent', '') \ .replace('--quiet' , '') @@ -1843,7 +1843,7 @@ def framework_fail(name: Optional[TestName], way: Optional[WayName], reason: str # so we need to take care not to blow up with the wrong way # and report the actual reason for the failure. try: - directory = re.sub(r'^\.[/\\]', '', str(opts.testdir)) + directory = str_removeprefix(str_removeprefix(str(opts.testdir), './'), '.\\') except: directory = '' full_name = '%s(%s)' % (name, way) @@ -1856,7 +1856,7 @@ def framework_fail(name: Optional[TestName], way: Optional[WayName], reason: str def framework_warn(name: TestName, way: WayName, reason: str) -> None: opts = getTestOpts() - directory = re.sub(r'^\.[/\\]', '', str(opts.testdir)) + directory = str_removeprefix(str_removeprefix(str(opts.testdir), './'), '.\\') full_name = name + '(' + way + ')' if_verbose(1, '*** framework warning for %s %s ' % (full_name, reason)) t.framework_warnings.append(TestResult(directory, name, reason, way)) @@ -2550,7 +2550,7 @@ def split_file(in_fn: Path, delimiter: str, out1_fn: Path, out2_fn: Path): with out1_fn.open('w', encoding='utf8', newline='') as out1: with out2_fn.open('w', encoding='utf8', newline='') as out2: line = infile.readline() - while re.sub(r'^\s*','',line) != delimiter and line != '': + while line.lstrip() != delimiter and line != '': out1.write(line) line = infile.readline() @@ -2933,6 +2933,14 @@ def normalise_callstacks(s: str) -> str: tyCon_re = re.compile(r'TyCon\s*\d+\#\#\d?\d?\s*\d+\#\#\d?\d?\s*', flags=re.MULTILINE) +def drop_lines_containing(s: str, needle: str) -> str: + """ + Drop lines from `s` which contain `needle`. + """ + if needle not in s: + return s + return ''.join(line for line in s.splitlines(keepends=True) if needle not in line) + def normalise_type_reps(s: str) -> str: """ Normalise out fingerprints from Typeable TyCon representations """ return re.sub(tyCon_re, 'TyCon FINGERPRINT FINGERPRINT ', s) @@ -2944,8 +2952,8 @@ def normalise_errmsg(s: str) -> str: s = s.replace('ld: 0706-027 The -x flag is ignored.\n', '') # remove " error:" and lower-case " Warning:" to make patch for # trac issue #10021 smaller - s = modify_lines(s, lambda l: re.sub(' error:', '', l)) - s = modify_lines(s, lambda l: re.sub(' Warning:', ' warning:', l)) + s = modify_lines(s, lambda l: l.replace(' error:', '')) + s = modify_lines(s, lambda l: l.replace(' Warning:', ' warning:')) s = normalise_callstacks(s) s = normalise_type_reps(s) @@ -2960,7 +2968,7 @@ def normalise_errmsg(s: str) -> str: # a target prefix (e.g. `aarch64-linux-gnu-ghc`) # * On Windows the executable name may mention the # versioned name (e.g. `ghc-9.2.1`) - s = re.sub(Path(config.compiler).name + ':', 'ghc:', s) + s = s.replace(Path(config.compiler).name + ':', 'ghc:') # If somefile ends in ".exe" or ".exe:", zap ".exe" (for Windows) # the colon is there because it appears in error messages; this @@ -2973,11 +2981,13 @@ def normalise_errmsg(s: str) -> str: s = re.sub(r'([^\s])\.jsexe', r'\1', s) # hpc executable is given ghc suffix - s = re.sub('hpc-ghc', 'hpc', s) + s = s.replace('hpc-ghc', 'hpc') # The inplace ghc's are called ghc-stage[123] to avoid filename # collisions, so we need to normalise that to just "ghc" - s = re.sub('ghc-stage[123]', 'ghc', s) + s = (s.replace('ghc-stage1', 'ghc') + .replace('ghc-stage2', 'ghc') + .replace('ghc-stage3', 'ghc')) # Remove platform prefix (e.g. javascript-unknown-ghcjs) for cross-compiled tools # (ghc, ghc-pkg, unlit, etc.) s = re.sub(r'\w+(-\w+)*-ghc', 'ghc', s) @@ -3000,7 +3010,7 @@ def normalise_errmsg(s: str) -> str: # Also filter out bullet characters. This is because bullets are used to # separate error sections, and tests shouldn't be sensitive to how the # the division happens. - bullet = '•'.encode('utf8') if isinstance(s, bytes) else '•' + bullet = '•' s = s.replace(bullet, '') # Windows only, this is a bug in hsc2hs but it is preventing @@ -3015,19 +3025,19 @@ def normalise_errmsg(s: str) -> str: s = modify_lines(s, lambda l: re.sub(r'^(.+)warning: (.+): unsupported GNU_PROPERTY_TYPE (?:$5$ )?type: 0xc000000(.*)$', '', l)) s = re.sub(r'ld: warning: passed .* min versions $.*$ for platform macOS. Using [\.0-9]+.','',s) - s = re.sub('ld: warning: -sdk_version and -platform_version are not compatible, ignoring -sdk_version','',s) + s = s.replace('ld: warning: -sdk_version and -platform_version are not compatible, ignoring -sdk_version', '') # ignore superfluous dylibs passed to the linker. - s = re.sub('ld: warning: .*, ignoring unexpected dylib file\n','',s) + s = drop_lines_containing(s, 'ignoring unexpected dylib file') # ignore LLVM Version mismatch garbage; this will just break tests. - s = re.sub('You are using an unsupported version of LLVM!.*\n','',s) - s = re.sub('Currently only [\\.0-9]+ is supported. System LLVM version: [\\.0-9]+.*\n','',s) - s = re.sub('We will try though\\.\\.\\..*\n','',s) + s = drop_lines_containing(s, 'You are using an unsupported version of LLVM!') + s = drop_lines_containing(s, 'System LLVM version:') + s = drop_lines_containing(s, 'We will try though...') # ignore warning about strip invalidating signatures - s = re.sub('.*strip: changes being made to the file will invalidate the code signature in.*\n','',s) + s = drop_lines_containing(s, 'strip: changes being made to the file will invalidate the code signature in') # clang may warn about unused argument when used as assembler - s = re.sub('.*warning: argument unused during compilation:.*\n', '', s) + s = drop_lines_containing(s, 'warning: argument unused during compilation:') # Emscripten displays cache info and old emcc doesn't support EMCC_LOGGING=0 - s = re.sub('cache:INFO: .*\n', '', s) + s = drop_lines_containing(s, 'cache:INFO:') # Old emcc warns when we export HEAP8 but new one requires it (see #26290) s = s.replace('warning: invalid item in EXPORTED_RUNTIME_METHODS: HEAP8\nwarning: invalid item in EXPORTED_RUNTIME_METHODS: HEAPU8\nemcc: warning: warnings in JS library compilation [-Wjs-compiler]\n','') @@ -3050,7 +3060,7 @@ def normalise_prof (s: str) -> str: # The next step assumes none of the fields have no spaces in, which is broke # when the src = <no location info> - s = re.sub('no location info','no-location-info', s) + s = s.replace('no location info', 'no-location-info') # Source locations from internal libraries, remove the source location # > libraries/ghc-internal/src/path/Foo.hs:204:1-18 @@ -3103,21 +3113,21 @@ def normalise_prof (s: str) -> str: return s def normalise_slashes_( s: str ) -> str: - s = re.sub(r'\\', '/', s) - s = re.sub(r'//', '/', s) + s = s.replace('\\', '/') + s = s.replace('//', '/') return s def normalise_exe_( s: str ) -> str: - s = re.sub(r'\.exe', '', s) - s = re.sub(r'\.wasm', '', s) - s = re.sub(r'\.jsexe', '', s) + s = s.replace('.exe', '') + s = s.replace('.wasm', '') + s = s.replace('.jsexe', '') return s def normalise_output( s: str ) -> str: # remove " error:" and lower-case " Warning:" to make patch for # trac issue #10021 smaller - s = modify_lines(s, lambda l: re.sub(' error:', '', l)) - s = modify_lines(s, lambda l: re.sub(' Warning:', ' warning:', l)) + s = modify_lines(s, lambda l: l.replace(' error:', '')) + s = modify_lines(s, lambda l: l.replace(' Warning:', ' warning:')) # Remove a .exe extension (for Windows) # and .wasm extension (for the Wasm backend) # and .jsexe extension (for the JS backend) @@ -3129,19 +3139,19 @@ def normalise_output( s: str ) -> str: s = normalise_type_reps(s) # ghci outputs are pretty unstable with -fexternal-dynamic-refs, which is # requires for -fPIC - s = re.sub(' -fexternal-dynamic-refs\n','',s) + s = s.replace(' -fexternal-dynamic-refs\n', '') s = re.sub(r'ld: warning: passed .* min versions $.*$ for platform macOS. Using [\.0-9]+.','',s) - s = re.sub('ld: warning: -sdk_version and -platform_version are not compatible, ignoring -sdk_version','',s) + s = s.replace('ld: warning: -sdk_version and -platform_version are not compatible, ignoring -sdk_version', '') # ignore superfluous dylibs passed to the linker. - s = re.sub('ld: warning: .*, ignoring unexpected dylib file\n','',s) + s = drop_lines_containing(s, 'ignoring unexpected dylib file') # ignore LLVM Version mismatch garbage; this will just break tests. - s = re.sub('You are using an unsupported version of LLVM!.*\n','',s) - s = re.sub('Currently only [\\.0-9]+ is supported. System LLVM version: [\\.0-9]+.*\n','',s) - s = re.sub('We will try though\\.\\.\\..*\n','',s) + s = drop_lines_containing(s, 'You are using an unsupported version of LLVM!') + s = drop_lines_containing(s, 'System LLVM version:') + s = drop_lines_containing(s, 'We will try though...') # ignore warning about strip invalidating signatures - s = re.sub('.*strip: changes being made to the file will invalidate the code signature in.*\n','',s) + s = drop_lines_containing(s, 'strip: changes being made to the file will invalidate the code signature in') # clang may warn about unused argument when used as assembler - s = re.sub('.*warning: argument unused during compilation:.*\n', '', s) + s = drop_lines_containing(s, 'warning: argument unused during compilation:') # strip the cross prefix if any s = re.sub(r'\w+(-\w+)*-ghc', 'ghc', s) ===================================== testsuite/driver/testutil.py ===================================== @@ -40,6 +40,12 @@ def strip_quotes(s: str) -> str: # Don't wrap commands to subprocess.call/Popen in quotes. return s.strip('\'"') +# Python 3.7 compatibility shim for str.removeprefix (added in Python 3.9). +def str_removeprefix(s: str, prefix: str) -> str: + if s.startswith(prefix): + return s.replace(prefix, '', 1) + return s + def str_warn(s: str) -> str: return colored(Color.YELLOW, s) View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/ca79475f6b4dfba991e2c933bac9c22… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/ca79475f6b4dfba991e2c933bac9c22… You're receiving this email because of your account on gitlab.haskell.org.

1 0

[Git][ghc/ghc][master] Make the implicit-parameter class have representational role
by Marge Bot (＠marge-bot) 21 Jan '26

21 Jan '26

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: 34a27e20 by Simon Peyton Jones at 2026-01-21T16:08:17-05:00 Make the implicit-parameter class have representational role This MR addresses #26737, by making the built-in class IP have a representational role for its second parameter. See Note [IP: implicit parameter class] in ghc-internal:GHC.Internal.Classes.IP In fact, IP is (unfortunately, currently) exposed by base:GHC.Base, so we ran a quick CLC proposal to agree the change: https://github.com/haskell/core-libraries-committee/issues/385 Some (small) compilations get faster because they only need to load (small) interface file GHC.Internal.Classes.IP.hi, rather than (large) GHC.Internal.Classes.hi. Metric Decrease: T10421 T12150 T12425 T24582 T5837 T5030 - - - - - 14 changed files: - compiler/GHC/Builtin/Names.hs - docs/users_guide/9.16.1-notes.rst - libraries/ghc-internal/ghc-internal.cabal.in - libraries/ghc-internal/src/GHC/Internal/Classes.hs - + libraries/ghc-internal/src/GHC/Internal/Classes/IP.hs - testsuite/tests/interface-stability/base-exports.stdout - testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs - testsuite/tests/interface-stability/base-exports.stdout-mingw32 - testsuite/tests/interface-stability/base-exports.stdout-ws-32 - testsuite/tests/interface-stability/ghc-prim-exports.stdout - testsuite/tests/interface-stability/ghc-prim-exports.stdout-mingw32 - testsuite/tests/th/TH_implicitParams.stdout - + testsuite/tests/typecheck/should_compile/T26737.hs - testsuite/tests/typecheck/should_compile/all.T Changes: ===================================== compiler/GHC/Builtin/Names.hs ===================================== @@ -526,7 +526,7 @@ genericTyConNames = [ gHC_PRIM, gHC_PRIM_PANIC, gHC_TYPES, gHC_INTERNAL_DATA_DATA, gHC_MAGIC, gHC_MAGIC_DICT, - gHC_CLASSES, gHC_PRIMOPWRAPPERS :: Module + gHC_CLASSES, gHC_CLASSES_IP, gHC_PRIMOPWRAPPERS :: Module gHC_PRIM = mkGhcInternalModule (fsLit "GHC.Internal.Prim") -- Primitive types and values gHC_PRIM_PANIC = mkGhcInternalModule (fsLit "GHC.Internal.Prim.Panic") gHC_TYPES = mkGhcInternalModule (fsLit "GHC.Internal.Types") @@ -534,6 +534,7 @@ gHC_MAGIC = mkGhcInternalModule (fsLit "GHC.Internal.Magic") gHC_MAGIC_DICT = mkGhcInternalModule (fsLit "GHC.Internal.Magic.Dict") gHC_CSTRING = mkGhcInternalModule (fsLit "GHC.Internal.CString") gHC_CLASSES = mkGhcInternalModule (fsLit "GHC.Internal.Classes") +gHC_CLASSES_IP = mkGhcInternalModule (fsLit "GHC.Internal.Classes.IP") gHC_PRIMOPWRAPPERS = mkGhcInternalModule (fsLit "GHC.Internal.PrimopWrappers") gHC_INTERNAL_TUPLE = mkGhcInternalModule (fsLit "GHC.Internal.Tuple") @@ -1521,7 +1522,7 @@ fromLabelClassOpName -- Implicit Parameters ipClassName :: Name ipClassName - = clsQual gHC_CLASSES (fsLit "IP") ipClassKey + = clsQual gHC_CLASSES_IP (fsLit "IP") ipClassKey -- Overloaded record fields hasFieldClassName :: Name ===================================== docs/users_guide/9.16.1-notes.rst ===================================== @@ -30,6 +30,18 @@ Language - The extension :extension:`ExplicitNamespaces` now allows namespace-specified wildcards ``type ..`` and ``data ..`` in import and export lists. +- Implicit parameters and ``ImpredicativeTypes``. GHC now knows + that if ``?foo::S`` is coecible to ``?foo::T`` only if ``S`` is coercible to ``T``. + Example (from :ghc-ticket:`#26737`):: + + {-# LANGUAGE ImplicitParams, ImpredicativeTypes #-} + newtype N = MkN Int + test :: ((?foo::N) => Bool) -> ((?foo::Int) => Bool) + test = coerce + + This is achieved by arranging that ``?foo :: T`` has a representational + role for ``T``. + Compiler ~~~~~~~~ ===================================== libraries/ghc-internal/ghc-internal.cabal.in ===================================== @@ -343,6 +343,7 @@ Library GHC.Internal.CString GHC.Internal.Classes + GHC.Internal.Classes.IP GHC.Internal.Debug GHC.Internal.Magic GHC.Internal.Magic.Dict ===================================== libraries/ghc-internal/src/GHC/Internal/Classes.hs ===================================== @@ -1,10 +1,9 @@ {-# LANGUAGE Trustworthy #-} {-# LANGUAGE NoImplicitPrelude, MagicHash, StandaloneDeriving, BangPatterns, KindSignatures, DataKinds, ConstraintKinds, - MultiParamTypeClasses, FunctionalDependencies #-} -{-# LANGUAGE UnboxedTuples #-} -{-# LANGUAGE AllowAmbiguousTypes #-} - -- ip :: IP x a => a is strictly speaking ambiguous, but IP is magic + MultiParamTypeClasses, FunctionalDependencies, + UnboxedTuples #-} + {-# LANGUAGE UndecidableSuperClasses #-} -- Because of the type-variable superclasses for tuples @@ -142,6 +141,7 @@ import GHC.Internal.Prim import GHC.Internal.Tuple import GHC.Internal.CString (unpackCString#) import GHC.Internal.Types +import GHC.Internal.Classes.IP infix 4 ==, /=, <, <=, >=, > infixr 3 && @@ -149,12 +149,6 @@ infixr 2 || default () -- Double isn't available yet --- | The syntax @?x :: a@ is desugared into @IP "x" a@ --- IP is declared very early, so that libraries can take --- advantage of the implicit-call-stack feature -class IP (x :: Symbol) a | x -> a where - ip :: a - {- $matching_overloaded_methods_in_rules Matching on class methods (e.g. @(==)@) in rewrite rules tends to be a bit ===================================== libraries/ghc-internal/src/GHC/Internal/Classes/IP.hs ===================================== @@ -0,0 +1,87 @@ +{-# LANGUAGE Trustworthy #-} +{-# LANGUAGE NoImplicitPrelude, MagicHash, StandaloneDeriving, BangPatterns, + KindSignatures, DataKinds, ConstraintKinds, + MultiParamTypeClasses, FunctionalDependencies #-} + +{-# LANGUAGE AllowAmbiguousTypes, RoleAnnotations, IncoherentInstances #-} + -- LANGUAGE pragmas: see Note [IP: implicit parameter class] + +{-# OPTIONS_HADDOCK not-home #-} +----------------------------------------------------------------------------- +-- | +-- Module : GHC.Internal.Classes.IP +-- Copyright : (c) The University of Glasgow, 1992-2002 +-- License : see libraries/base/LICENSE +-- +-- Maintainer : ghc-devs(a)haskell.org +-- Stability : internal +-- Portability : non-portable (GHC extensions) +-- +-- Basic classes. +-- Do not import this module directly. It is an GHC internal only +-- module. Some of its contents are instead available from @Prelude@ +-- and @GHC.Int@. +-- +----------------------------------------------------------------------------- + +module GHC.Internal.Classes.IP( IP(..)) where + +import GHC.Internal.Types + + +default () -- Double isn't available yet + +-- | The syntax @?x :: a@ is desugared into @IP "x" a@ +-- IP is declared very early, so that libraries can take +-- advantage of the implicit-call-stack feature +type role IP nominal representational -- See (IPRoles) +class IP (x :: Symbol) a | x -> a where + ip :: a + +{- Note [IP: implicit parameter class] +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +An implicit parameter constraint (?foo::ty) is just short for + + IP "foo" ty + +where ghc-internal:GHC.Internal.Classes.IP is a special class that +GHC knows about, defined in this module. + +* It is a unary type class, with one method `ip`, so it has no cost. + For example, (?foo::Int) is represented just by an Int. + +* Criticially, it has a functional dependency: + class IP (x :: Symbol) a | x -> a where ... + So if we have + [G] IP "foo" Int + [W] IP "foo" alpha + the fundep wil lgive us alpha ~ Int, as desired. + +* The solver has a number of special cases for implicit parameters, + mainly because a binding (let ?foo::Int = rhs in body) + is like a local instance declaration for IP. Search for uses + of `isIPClass`. + +Wrinkles + +(IPAmbiguity) The single method of IP has an ambiguous type + ip :: forall a. IP s a => a + Hence the LANGUAGE pragama AllowAmbiguousTypes. + The method `ip` is never called by the user, so ambiguity doesn't matter. + +(IPRoles) IP has a role annotation. Why? See #26737. We want + [W] IP "foo" t1 ~R# IP "foo" t2 + to decompose to give [W] IP t1 ~R# t2, using /representational/ + equality for (t1 ~R# t2) not nominal. + + This usually gives a complaint about incoherence, because in general + (t1 ~R# t2) does NOT imply (C t1) ~R# (C t2) for any normal class. + But it does for IP, because instance selection is controlled by the Symbol, + not the type of the payload. Hence LANGUAGE pragma IncoherentInstances. + (It is unfortunate that we need a module-wide IncoherentInstances here; + see #17167.) + + Side note: arguably this treatment could be applied to any class + with a functional dependency; but for now we restrict it to IP. +-} + ===================================== testsuite/tests/interface-stability/base-exports.stdout ===================================== @@ -3293,6 +3293,7 @@ module GHC.Base where {-# MINIMAL fmap #-} type IO :: * -> * newtype IO a = IO (State# RealWorld -> (# State# RealWorld, a #)) + type role IP nominal representational type IP :: Symbol -> * -> Constraint class IP x a | x -> a where ip :: a ===================================== testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs ===================================== @@ -3293,6 +3293,7 @@ module GHC.Base where {-# MINIMAL fmap #-} type IO :: * -> * newtype IO a = IO (State# RealWorld -> (# State# RealWorld, a #)) + type role IP nominal representational type IP :: Symbol -> * -> Constraint class IP x a | x -> a where ip :: a ===================================== testsuite/tests/interface-stability/base-exports.stdout-mingw32 ===================================== @@ -3293,6 +3293,7 @@ module GHC.Base where {-# MINIMAL fmap #-} type IO :: * -> * newtype IO a = IO (State# RealWorld -> (# State# RealWorld, a #)) + type role IP nominal representational type IP :: Symbol -> * -> Constraint class IP x a | x -> a where ip :: a ===================================== testsuite/tests/interface-stability/base-exports.stdout-ws-32 ===================================== @@ -3293,6 +3293,7 @@ module GHC.Base where {-# MINIMAL fmap #-} type IO :: * -> * newtype IO a = IO (State# RealWorld -> (# State# RealWorld, a #)) + type role IP nominal representational type IP :: Symbol -> * -> Constraint class IP x a | x -> a where ip :: a ===================================== testsuite/tests/interface-stability/ghc-prim-exports.stdout ===================================== @@ -1171,6 +1171,7 @@ module GHC.Classes where (==) :: a -> a -> GHC.Internal.Types.Bool (/=) :: a -> a -> GHC.Internal.Types.Bool {-# MINIMAL (==) | (/=) #-} + type role IP nominal representational type IP :: GHC.Internal.Types.Symbol -> * -> Constraint class IP x a | x -> a where ip :: a ===================================== testsuite/tests/interface-stability/ghc-prim-exports.stdout-mingw32 ===================================== @@ -1171,6 +1171,7 @@ module GHC.Classes where (==) :: a -> a -> GHC.Internal.Types.Bool (/=) :: a -> a -> GHC.Internal.Types.Bool {-# MINIMAL (==) | (/=) #-} + type role IP nominal representational type IP :: GHC.Internal.Types.Symbol -> * -> Constraint class IP x a | x -> a where ip :: a ===================================== testsuite/tests/th/TH_implicitParams.stdout ===================================== @@ -1,5 +1,5 @@ -Main.funcToReify :: GHC.Internal.Classes.IP "z" - GHC.Internal.Types.Int => +Main.funcToReify :: GHC.Internal.Classes.IP.IP "z" + GHC.Internal.Types.Int => GHC.Internal.Types.Int 5 1 ===================================== testsuite/tests/typecheck/should_compile/T26737.hs ===================================== @@ -0,0 +1,10 @@ +{-# LANGUAGE ImpredicativeTypes, ImplicitParams #-} + +module T26737 where + +import Data.Coerce + +newtype Foo = MkFoo Int + +b :: ((?foo :: Foo) => Int) -> ((?foo :: Int) => Int) +b = coerce @(((?foo :: Foo) => Int)) @(((?foo :: Int) => Int)) ===================================== testsuite/tests/typecheck/should_compile/all.T ===================================== @@ -958,3 +958,4 @@ test('T14745', normal, compile, ['']) test('T26451', normal, compile, ['']) test('T26582', normal, compile, ['']) test('T26746', normal, compile, ['']) +test('T26737', normal, compile, ['']) View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/34a27e2042b697b198aa85a7460fee7… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/34a27e2042b697b198aa85a7460fee7… You're receiving this email because of your account on gitlab.haskell.org.

1 0

[Git][ghc/ghc][master] 2 commits: rts: fix typo in TICK_ALLOC_RTS
by Marge Bot (＠marge-bot) 21 Jan '26

21 Jan '26

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: 5efb58dc by Cheng Shao at 2026-01-21T16:07:36-05:00 rts: fix typo in TICK_ALLOC_RTS This patch fixes a typo in the `TICK_ALLOC_RTS` macro, the original `bytes` argument was silently dropped. The Cmm code has its own version of `TICK_ALLOC_RTS` not affected by this typo, it affected the C RTS, and went unnoticed because the variable `n` happened to also be available at its call site. But the number was incorrect. Also fixes its call site since `WDS()` is not available in C. - - - - - c406ea69 by Cheng Shao at 2026-01-21T16:07:36-05:00 rts: remove broken & unused ALLOC_P_TICKY This patch removes the `ALLOC_P_TICKY` macro from the rts, it's unused, and its expanded code is already broken. - - - - - 3 changed files: - rts/include/Cmm.h - rts/include/stg/Ticky.h - rts/sm/Storage.c Changes: ===================================== rts/include/Cmm.h ===================================== @@ -441,12 +441,6 @@ #define HP_CHK_P(bytes, fun, arg) \ HEAP_CHECK(bytes, GC_PRIM_P(fun,arg)) -// TODO I'm not seeing where ALLOC_P_TICKY is used; can it be removed? -// -NSF March 2013 -#define ALLOC_P_TICKY(bytes, fun, arg) \ - HP_CHK_P(bytes); \ - TICK_ALLOC_RTS(bytes); - // Load a field out of structure with relaxed ordering. #define RELAXED_LOAD_FIELD(fld, ptr) \ REP_##fld![(ptr) + OFFSET_##fld] ===================================== rts/include/stg/Ticky.h ===================================== @@ -246,7 +246,7 @@ EXTERN StgInt RET_UNBOXED_TUP_hst[TICKY_BIN_COUNT] INIT({0}); TICK_BUMP_BY(ALLOC_THK_gds,g);\ TICK_BUMP_BY(ALLOC_THK_slp,s);\ -#define TICK_ALLOC_RTS(bytes)\ +#define TICK_ALLOC_RTS(n)\ TICK_BUMP(ALLOC_RTS_ctr);\ TICK_BUMP_BY(ALLOC_RTS_tot,n); #endif ===================================== rts/sm/Storage.c ===================================== @@ -990,7 +990,7 @@ move_STACK (StgStack *src, StgStack *dest) void accountAllocation(Capability *cap, W_ n) { - TICK_ALLOC_RTS(WDS(n)); + TICK_ALLOC_RTS(n*sizeof(W_)); CCS_ALLOC(cap->r.rCCCS,n); if (cap->r.rCurrentTSO != NULL) { // cap->r.rCurrentTSO->alloc_limit -= n*sizeof(W_) View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/485c12b2fe697b71a62fcd1f418aaa… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/485c12b2fe697b71a62fcd1f418aaa… You're receiving this email because of your account on gitlab.haskell.org.

1 0

[Git][ghc/ghc][master] Revert "hadrian: handle findExecutable "" gracefully"
by Marge Bot (＠marge-bot) 21 Jan '26

21 Jan '26

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: 485c12b2 by Cheng Shao at 2026-01-21T16:06:54-05:00 Revert "hadrian: handle findExecutable "" gracefully" This reverts commit 1e5752f64a522c4025365856d92f78073a7b3bba. The underlying issue has been fixed in https://github.com/haskell/directory/commit/75828696e7145adc09179111a0d631b… and present since 1.3.9.0, and hadrian directory lower bound is 1.3.9.0, so we can revert our own in house hack now. - - - - - 4 changed files: - hadrian/src/Hadrian/Utilities.hs - hadrian/src/Rules/Docspec.hs - hadrian/src/Rules/Lint.hs - hadrian/src/Settings/Builders/RunTest.hs Changes: ===================================== hadrian/src/Hadrian/Utilities.hs ===================================== @@ -19,7 +19,6 @@ module Hadrian.Utilities ( copyFile, copyFileUntracked, createFileLink, fixFile, makeExecutable, moveFile, removeFile, createDirectory, copyDirectory, moveDirectory, removeDirectory, removeFile_, writeFileChangedBS, - findExecutable, -- * Diagnostic info Colour (..), ANSIColour (..), putColoured, shouldUseColor, @@ -691,7 +690,3 @@ renderUnicorn ls = ponyPadding = " " boxLines :: [String] boxLines = ["", "", ""] ++ (lines . renderBox $ ls) - --- Workaround for https://github.com/haskell/directory/issues/180 -findExecutable :: String -> IO (Maybe FilePath) -findExecutable exe = IO.catch (IO.findExecutable exe) $ \(_ :: IO.IOException) -> pure Nothing ===================================== hadrian/src/Rules/Docspec.hs ===================================== @@ -2,6 +2,8 @@ module Rules.Docspec ( docspecRules ) where +import System.Directory (findExecutable) + import Base import Context.Path import Settings.Builders.Common ===================================== hadrian/src/Rules/Lint.hs ===================================== @@ -4,6 +4,7 @@ module Rules.Lint import Base import Settings.Builders.Common +import System.Directory (findExecutable) import System.Exit (exitFailure) lintRules :: Rules () ===================================== hadrian/src/Settings/Builders/RunTest.hs ===================================== @@ -16,6 +16,7 @@ import Settings.Builders.Common import qualified Data.Set as Set import Flavour import qualified Context.Type as C +import System.Directory (findExecutable) import Settings.Program import qualified Context.Type View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/485c12b2fe697b71a62fcd1f418aaae… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/485c12b2fe697b71a62fcd1f418aaae… You're receiving this email because of your account on gitlab.haskell.org.

1 0

[Git][ghc/ghc][master] Use the correct field of ModOrigin when formatting error message listing hidden reexports
by Marge Bot (＠marge-bot) 21 Jan '26

21 Jan '26

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: 3172db94 by Torsten Schmits at 2026-01-21T16:06:11-05:00 Use the correct field of ModOrigin when formatting error message listing hidden reexports - - - - - 1 changed file: - compiler/GHC/Unit/State.hs Changes: ===================================== compiler/GHC/Unit/State.hs ===================================== @@ -215,7 +215,7 @@ instance Outputable ModuleOrigin where (if null rhs then [] else [text "hidden reexport by" <+> - sep (map (ppr . mkUnit) res)]) ++ + sep (map (ppr . mkUnit) rhs)]) ++ (if f then [text "package flag"] else []) )) View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/3172db940a11b1bae7490a2351f4154… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/3172db940a11b1bae7490a2351f4154… You're receiving this email because of your account on gitlab.haskell.org.

1 0

[Git][ghc/ghc][master] Don't build GHC with -Wcompat
by Marge Bot (＠marge-bot) 21 Jan '26

21 Jan '26

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: 759fd15a by Andreas Klebinger at 2026-01-21T16:05:28-05:00 Don't build GHC with -Wcompat Without bumping the boot compiler the warnings it produces are often not actionable leading to pointless noise. Fixes #26800 - - - - - 2 changed files: - compiler/ghc.cabal.in - hadrian/src/Settings/Builders/Ghc.hs Changes: ===================================== compiler/ghc.cabal.in ===================================== @@ -149,6 +149,7 @@ Library else Build-Depends: unix >= 2.7 && < 2.9 + -- Hadrian further set some warnings in its Settings.Warnings module. GHC-Options: -Wall -Wno-name-shadowing -Wnoncanonical-monad-instances ===================================== hadrian/src/Settings/Builders/Ghc.hs ===================================== @@ -38,7 +38,6 @@ compileAndLinkHs = (builder (Ghc CompileHs) ||^ builder (Ghc LinkHs)) ? do stage <- getStage hie_path <- getHieBuildPath mconcat [ arg "-Wall" - , arg "-Wcompat" , not useColor ? builder (Ghc CompileHs) ? -- N.B. Target.trackArgument ignores this argument from the -- input hash to avoid superfluous recompilation, avoiding View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/759fd15ad1eca1d8dd4838ba789ef74… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/759fd15ad1eca1d8dd4838ba789ef74… You're receiving this email because of your account on gitlab.haskell.org.

1 0