Issues · Glasgow Haskell Compiler / GHC

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#line pragmas not respected inside nested comments

#314 · opened Feb 28, 2005 by nobody 8.8.1 5 Pnormal Trac import bug parser
- CLOSED
- 16
updated Jul 07, 2019
Documentation for base does not include special items

#4861 · opened Dec 24, 2010 by Neil Mitchell 8.8.1 3 Plow Trac import bug core libraries documentation
- CLOSED
- 10
updated Jul 07, 2019
Some unicode symbols are not allow in literal characters or strings

#5518 · opened Sep 28, 2011 by ertai 8.8.1 5 Pnormal Trac import Unicode bug
- CLOSED
- 14
updated Nov 11, 2020
-fregs-graph still has a limit on spill slots

#8657 · opened Jan 08, 2014 by Simon Marlow 8.8.1 5 NCG backend Pnormal Trac import bug compiler crash
- CLOSED
- 3
- 15
updated Jul 07, 2019
Kind annotation in tuple not parsed

#8708 · opened Jan 27, 2014 by Richard Eisenberg 8.8.1 5 Pnormal Trac import bug parser
- CLOSED
- 4
updated Jul 07, 2019
forM_ [1..N] does not get fused (allocates 50% more)

#8763 · opened Feb 09, 2014 by Niklas Hambüchen 8.8.1 5 Pnormal Trac import bug runtime perf
- CLOSED
- 1
- 88
updated May 21, 2020
Emit quantified Coercible constraints in GeneralizedNewtypeDeriving

#9123 · opened May 19, 2014 by Simon Peyton Jones 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 66
updated Jul 07, 2019
CPR related performance issue

#10069 · opened Feb 09, 2015 by pacak 8.8.1 5 Pnormal Trac import bug runtime perf
- CLOSED
- 43
updated Jul 07, 2019
"ghci -XMonomorphismRestriction" doesn't turn on the monomorphism restriction

#10857 · opened Sep 08, 2015 by rwbarton 8.8.1 5 GHCi Pnormal Trac import bug newcomer
- CLOSED
- 13
updated Jul 07, 2019
missing empty-Enumeration and out-of-range warning for `Natural`

#10930 · opened Oct 03, 2015 by Herbert Valerio Riedel 8.8.1 3 Plow Trac import bug
- CLOSED
- 8
updated Jul 07, 2019
hsc2hs does not handle single quotes properly

#11004 · opened Oct 22, 2015 by Sergey Vinokurov 8.8.1 5 Pnormal Trac import bug external-hsc2hs newcomer
- CLOSED
- 9
updated Jul 07, 2019
Template Haskell / GHCi does not respect extra-lib-dirs

#11042 · opened Nov 01, 2015 by Mathieu Boespflug 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 34
updated Jul 07, 2019
Add -fshow-runtime-rep

#11549 · opened Feb 06, 2016 by Richard Eisenberg 8.8.1 5 Pnormal Trac import TypeInType bug
- CLOSED
- 20
updated Jul 07, 2019
name shadowing warnings don't trigger on standalone declarations in ghci

#11606 · opened Feb 18, 2016 by rwbarton 8.8.1 7 GHCi Phigh Trac import bug
- CLOSED
- 13
updated Jul 07, 2019
Annotating types in type familiy equations without parentheses

#11622 · opened Feb 21, 2016 by Icelandjack 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 5
updated Jul 07, 2019
GHCi does not honour implicit `module Main (main) where` for re-exported `main`s

#11647 · opened Feb 26, 2016 by Herbert Valerio Riedel 8.8.1 5 GHCi Pnormal Trac import bug
- CLOSED
- 4
updated Nov 03, 2019
Cannot use higher-rank kinds with type families

#11719 · opened Mar 18, 2016 by Ollie Charles 8.8.1 5 Pnormal Trac import TypeInType bug typechecker
- CLOSED
- 23
updated Jul 07, 2019
TypeFamilyDependencies accepts invalid injectivity annotation

#12430 · opened Jul 24, 2016 by Alexey Vagarenko 8.8.1 7 Phigh Trac import bug injective type families typechecker
- CLOSED
- 5
updated Jul 07, 2019
Internal identifiers creeping into :show bindings

#12525 · opened Aug 23, 2016 by mniip 8.8.1 3 GHCi Plow Trac import bug runtime perf
- CLOSED
- 3
updated Jul 07, 2019
Bad error message for flags with required but missing arguments

#12625 · opened Sep 26, 2016 by dramforever 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 3
updated Jul 07, 2019
GHC doesn't handle ./ prefixed paths correctly

#12674 · opened Oct 08, 2016 by dobenour 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 8
updated Jul 07, 2019
Incorrect redudant imports warning

#13064 · opened Jan 04, 2017 by Oleg Grenrus 8.8.1 7 Phigh Trac import bug error messages
- CLOSED
- 51
updated Jul 07, 2019
AlternativeLayoutRule breaks LambdaCase

#13087 · opened Jan 08, 2017 by ohhellojoe 8.8.1 5 Pnormal Trac import bug parser
- CLOSED
- 6
updated Jul 07, 2019
Check known-key lists

#13279 · opened Feb 13, 2017 by David Feuer 8.8.1 5 Pnormal Trac import bug compiler perf newcomer task
- CLOSED
- 8
updated Jul 07, 2019
Incorrect behavior on arm64 with optimisations

#13513 · opened Apr 02, 2017 by achirkin 8.8.1 5 Pnormal Trac import bug incorrect runtime result
- CLOSED
- 10
updated Aug 10, 2019
GHC fails with "Dynamic linker not initialised" when -j is on and trying to load nonexistent .so file

#13531 · opened Apr 05, 2017 by Niklas Hambüchen 8.8.1 5 Pnormal Trac import bug compiler crash
- CLOSED
- 6
updated Sep 28, 2020
surprising error message with bang pattern

#13600 · opened Apr 21, 2017 by Andrew U. Frank 8.8.1 5 BangPatterns Pnormal Trac import bug error messages newcomer
- 15
updated Dec 18, 2020
GHCi linker does not honor alignment of sections.

#13617 · opened Apr 26, 2017 by Ryan Scott 8.8.1 5 GHCi Pnormal Trac import bug
- CLOSED
- 12
updated Jul 07, 2019
GHCi linker is dependent upon object file order

#13786 · opened Jun 04, 2017 by ppelleti 8.8.1 8 GHCi Phigh Trac import bug compiler crash linking
- CLOSED
- 4
- 15
updated Feb 17, 2020
TH-reified type family and data family instances have a paucity of kinds

#13809 · opened Jun 09, 2017 by Ryan Scott 8.8.1 5 Pnormal TemplateHaskell Trac import TypeFamilies bug
- CLOSED
- 8
updated Jul 07, 2019
Optional "-v" not allowed with :load in GHCi

#13862 · opened Jun 22, 2017 by vanto 8.8.1 5 GHCi Pnormal Trac import bug error messages
- CLOSED
- 9
updated Jul 07, 2019
"No module named ... is imported" message is a bit misleading with qualified imports

#14225 · opened Sep 13, 2017 by Ben Gamari 8.8.1 3 Plow Trac import bug
- CLOSED
- 3
updated Jul 07, 2019
Gruesome kind mismatch errors for associated data family instances

#14230 · opened Sep 14, 2017 by Ryan Scott 8.8.1 7 Phigh Trac import TypeInType bug error messages typechecker
- CLOSED
- 6
updated Jul 07, 2019
ghci leaks memory

#14336 · opened Oct 08, 2017 by Neil Mitchell 8.8.1 5 GHCi Pnormal Trac import bug runtime perf
- CLOSED
- 27
updated Jul 07, 2019
Type family equation refuses to unify wildcard type patterns

#14366 · opened Oct 18, 2017 by Ryan Scott 8.8.1 5 Pnormal Trac import TypeFamilies TypeInType bug typechecker
- CLOSED
- 8
updated Jul 07, 2019
`-optc-O3` getting shadowed by automatically injected -O flags

#14452 · opened Nov 11, 2017 by Herbert Valerio Riedel 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 6
updated Jul 07, 2019
Symlink resolving fails against SMB mounts

#14460 · opened Nov 13, 2017 by astert 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 22
updated Jul 07, 2019
Configure Harbormaster to trigger CircleCI builds

#14506 · opened Nov 22, 2017 by Ben Gamari 8.8.1 7 Phigh Trac import bug infrastructure
- CLOSED
- 8
updated Jul 07, 2019
GHCi ignores -XMonomorphismRestriction and -XNoExtendedDefaultRules

#14551 · opened Dec 01, 2017 by David Feuer 8.8.1 5 GHCi Pnormal Trac import bug
- CLOSED
- 3
updated Jul 07, 2019
qAddTopDecls: can't convert top-level declarations

#14627 · opened Jan 02, 2018 by tianxiaogu 8.8.1 5 Pnormal Trac import bug compiler crash
- CLOSED
- 7
updated Oct 08, 2020
normaliseType is not well-kinded

#14729 · opened Jan 27, 2018 by Richard Eisenberg 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 3
- 13
updated Jul 07, 2019
RTS header files can't be used with a C++ compiler

#14784 · opened Feb 09, 2018 by niteria 8.8.1 10 Phighest RTS Trac import bug
- CLOSED
- 1
- 7
updated Jul 07, 2019
EmptyCase thinks pattern match involving type family is not exhaustive, when it actually is

#14813 · opened Feb 16, 2018 by Ryan Scott 8.8.1 5 Pnormal Trac import bug error messages pattern match warnings
- CLOSED
- 10
updated Jul 07, 2019
Explicitly quantifying a kind variable causes a telescope to fail to kind-check

#14887 · opened Mar 03, 2018 by Ryan Scott 8.8.1 5 Pnormal Trac import TypeFamilies TypeInType bug typechecker
- CLOSED
- 13
updated Jul 07, 2019
ghc api: `load LoadAllTargets` is not idempotent

#14994 · opened Apr 02, 2018 by Bertram Felgenhauer 8.8.1 7 GHC API Phigh Trac import bug
- CLOSED
- 5
updated Jul 07, 2019
ghcpkg05 fails

#15059 · opened Apr 19, 2018 by Ben Gamari 8.8.1 7 CI breakage Phigh Trac import bug testsuite
- CLOSED
- 3
updated Jul 07, 2019
T8089 mysteriously fails when GHC is built with LLVM

#15064 · opened Apr 19, 2018 by Ben Gamari 8.8.1 10 CI breakage LLVM backend Phighest Trac import bug
- CLOSED
- 4
updated Aug 10, 2019
EtaExpandLevPoly triggers a core lint error in profasm/profthreaded ways

#15066 · opened Apr 19, 2018 by Alp Mestanogullari 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 2
updated Jul 07, 2019
:set usage in ghci tests breaks platform independence of output

#15071 · opened Apr 20, 2018 by Ben Gamari 8.8.1 7 CI breakage Phigh Trac import bug testsuite
- CLOSED
- 6
updated Jul 07, 2019
Typed hole with higher-rank kind causes GHC to panic (No skolem info)

#15076 · opened Apr 22, 2018 by Ryan Scott 8.8.1 5 Pnormal Trac import TypeInType bug compiler crash typechecker typed holes
- CLOSED
- 10
updated Jul 07, 2019
Unable to instantiate data members of kind Nat in backpack signatures.

#15138 · opened May 10, 2018 by Piyush P Kurur 8.8.1 5 Pnormal Trac import backpack bug
- CLOSED
- 8
updated Jul 07, 2019
decideKindGeneralisationPlan is too complicated

#15141 · opened May 11, 2018 by Simon Peyton Jones 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 4
updated Jul 07, 2019
bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler)

#15207 · opened May 31, 2018 by Carter Schonwald 8.8.1 5 Pnormal RTS Trac import bug debug information macOS
- CLOSED
- 47
updated Apr 15, 2020
GHC 8.4 fails to build on Debian armel (softfloat)

#15208 · opened May 31, 2018 by clint 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 5
- 4
updated Apr 11, 2020
plugins10 broken

#15216 · opened Jun 03, 2018 by Ben Gamari 8.8.1 7 Phigh Trac import bug
- CLOSED
- 4
updated Jul 07, 2019
failure to build pandoc on Debian armhf

#15221 · opened Jun 03, 2018 by clint 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 5
updated Jul 07, 2019
You can always set fixity of (:), with no effect

#15233 · opened Jun 05, 2018 by Icelandjack 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 3
updated Jul 07, 2019
GHCi's claim of infixr 0 (->) is a lie

#15235 · opened Jun 06, 2018 by Ryan Scott 8.8.1 5 Pnormal Trac import bug newcomer
- CLOSED
- 9
updated Dec 05, 2019
Is there an issue with Haskell GHC 8.4.3 on Travis?

#15239 · opened Jun 06, 2018 by Orome 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 5
updated Jul 07, 2019
-fghci-leak-cheak causes many testsuite failures with the quick build flavour

#15246 · opened Jun 07, 2018 by Ryan Scott 8.8.1 5 GHCi Pnormal Trac import bug
- CLOSED
- 6
updated Jul 07, 2019
Fuse zipWith3

#15263 · opened Jun 11, 2018 by Richard Eisenberg 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 6
updated Jul 07, 2019
ghc_ticker loops if permission denied on timerfd

#15292 · opened Jun 19, 2018 by jon.fairbairn@cl.cam.ac.uk 8.8.1 5 Pnormal Trac import bug runtime crash
- CLOSED
- 4
updated Jul 07, 2019
Sentence is about Complex type but mentions Simple constructor

#15296 · opened Jun 21, 2018 by Sasa 8.8.1 5 Pnormal Trac import bug documentation
- CLOSED
- 3
updated Jul 07, 2019
Erroneous "non-exhaustive pattern match" using nested GADT with strictness annotation

#15305 · opened Jun 23, 2018 by jkoppel 8.8.1 5 Pnormal Trac import bug error messages pattern match warnings typechecker
- CLOSED
- 15
updated Sep 22, 2020
Regarding coherence and implication loops in presence of QuantifiedConstraints

#15316 · opened Jun 26, 2018 by mniip 8.8.1 7 Phigh QuantifiedConstraints Trac import bug typechecker
- CLOSED
- 14
updated Oct 03, 2020
GHCi panic in getIdFromTrivialExpr with -fdefer-type-errors

#15325 · opened Jun 30, 2018 by dramforever 8.8.1 5 Pnormal Trac import bug compiler crash
- CLOSED
- 4
updated Nov 18, 2020
Error message prints invisible kind arguments in a visible matter

#15330 · opened Jul 02, 2018 by Ryan Scott 8.8.1 5 Pnormal Trac import TypeInType bug error messages typechecker
- CLOSED
- 7
updated Jul 07, 2019
(forall x. c x, forall x. d x) is not equivalent to forall x. (c x, d x)

#15334 · opened Jul 02, 2018 by Ryan Scott 8.8.1 5 Pnormal QuantifiedConstraints Trac import bug typechecker
- CLOSED
- 13
updated Aug 05, 2019
./System/IO.hs accidentally overridden when running ghci

#15336 · opened Jul 03, 2018 by luqui 8.8.1 5 GHCi Pnormal Trac import bug
- CLOSED
- 11
updated Aug 10, 2019
Mark -XAutoDeriveTypeable as deprecated

#15342 · opened Jul 04, 2018 by Krzysztof Gogolewski 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 2
updated Jul 07, 2019
Quantified constraints do not work with equality constraints

#15359 · opened Jul 11, 2018 by Richard Eisenberg 8.8.1 5 Pnormal QuantifiedConstraints Trac import bug
- CLOSED
- 16
updated Jul 07, 2019
Template Haskell splicing drops lots of type arguments

#15360 · opened Jul 11, 2018 by Richard Eisenberg 8.8.1 5 Pnormal TemplateHaskell Trac import bug
- CLOSED
- 3
updated Jun 13, 2020
Template Haskell ignores bad type family definitions

#15362 · opened Jul 11, 2018 by Richard Eisenberg 8.8.1 5 Pnormal TemplateHaskell Trac import bug
- CLOSED
- 3
updated Jul 07, 2019
Type families, holes and -fdefer-type-errors may cause 'opt_univ fell into a hole' panic

#15368 · opened Jul 12, 2018 by dramforever 8.8.1 5 Pnormal Trac import bug compiler crash
- CLOSED
- 7
updated Jul 07, 2019
GHCi doesn't honor ':set +c' when loading, for a second time, a file that has .hi/.o

#15369 · opened Jul 12, 2018 by dramforever 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 4
updated Jul 07, 2019
core-spec.pdf contains parse errors

#15373 · opened Jul 13, 2018 by Ryan Scott 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 4
updated Jul 07, 2019
Don't reject user-written instances of KnownNat and friends in hsig files

#15379 · opened Jul 14, 2018 by Edward Z. Yang 8.8.1 5 Pnormal Trac import backpack bug
- CLOSED
- 21
updated Jul 07, 2019
`elemIndex` and `findIndex` still can't fuse

#15426 · opened Jul 20, 2018 by KevinBuhr 8.8.1 5 Pnormal Trac import bug core libraries
- CLOSED
- 11
updated Jul 07, 2019
GhcStage3HcOpts passed to ghc-stage1

#15442 · opened Jul 26, 2018 by Ben Gamari 8.8.1 7 Phigh Trac import bug
- CLOSED
- 3
updated Jul 07, 2019
ghc panic when running GI.init on intero REPL

#15443 · opened Jul 27, 2018 by esclerofilo 8.8.1 5 GHCi Pnormal Trac import bug
- CLOSED
- 3
updated Jul 07, 2019
(~) and (!) are parsed inconsistently in types (plus documentation warts)

#15457 · opened Jul 30, 2018 by Ryan Scott 8.8.1 5 Pnormal Trac import bug parser
- CLOSED
- 4
updated Jul 07, 2019
Literals overflow

#15460 · opened Jul 31, 2018 by Sylvain Henry 8.8.1 5 Pnormal Trac import bug incorrect runtime result
- CLOSED
- 6
updated Jul 07, 2019
Polymorphism, typed splices and type inference don't mix

#15471 · opened Aug 03, 2018 by Matthew Pickering 8.8.1 5 Pnormal TemplateHaskell Trac import bug typed TemplateHaskell
- CLOSED
- 18
updated Jul 07, 2019
GHC HEAD type inference regression post-"Remove decideKindGeneralisationPlan"

#15472 · opened Aug 03, 2018 by Ryan Scott 8.8.1 10 Phighest Trac import TypeInType bug typechecker
- CLOSED
- 11
updated Jul 07, 2019
Add -fwarn-star-is-type to -Wcompat

#15476 · opened Aug 04, 2018 by Vladislav Zavialov 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 2
updated Jul 07, 2019
ghc-pkg package config validation too strict

#15478 · opened Aug 05, 2018 by Mathieu Boespflug 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 3
updated Jul 07, 2019
Bogus "No instance" error when type families appear in kinds

#15515 · opened Aug 13, 2018 by Ryan Scott 8.8.1 5 Pnormal Trac import TypeFamilies TypeInType bug error messages typechecker
- CLOSED
- 7
updated Jul 07, 2019
-O0 and pattern synonyms triggers panic in trimJoinCont

#15517 · opened Aug 14, 2018 by Simon Jakobi 8.8.1 5 Pnormal Trac import bug compiler crash
- CLOSED
- 8
updated Jul 07, 2019
Core Lint error with EmptyCase

#15549 · opened Aug 21, 2018 by Ryan Scott 8.8.1 5 Pnormal Trac import TypeFamilies TypeInType bug compiler crash typechecker
- CLOSED
- 3
- 9
updated Jul 07, 2019
TH-reified type classes have redundant tyvars/class constraints on each method

#15551 · opened Aug 21, 2018 by Ryan Scott 8.8.1 5 Pnormal TemplateHaskell Trac import bug
- CLOSED
- 4
updated Jul 07, 2019
Infinite loop/panic with an existential type.

#15552 · opened Aug 21, 2018 by howtonotwin 8.8.1 5 Pnormal Trac import bug compiler crash
- CLOSED
- 17
updated Jul 07, 2019
Kind variables in type family aren't quantified in toposorted order

#15568 · opened Aug 26, 2018 by Ryan Scott 8.8.1 5 Pnormal Trac import TypeApplications TypeFamilies bug
- CLOSED
- 3
updated Jul 07, 2019
nonVoid is too conservative w.r.t. strict argument types

#15584 · opened Aug 30, 2018 by Ryan Scott 8.8.1 5 Pnormal Trac import bug error messages pattern match warnings
- CLOSED
- 4
updated Jul 07, 2019
Inconsistent kind variable binder visibility between associated and non-associated type families

#15591 · opened Sep 01, 2018 by Ryan Scott 8.8.1 5 Pnormal Trac import TypeApplications TypeFamilies bug
- CLOSED
- 12
updated Jul 07, 2019
Type families without CUSKs cannot be given visible kind variable binders

#15592 · opened Sep 01, 2018 by Ryan Scott 8.8.1 5 CUSKs Pnormal Trac import TypeApplications TypeFamilies bug
- CLOSED
- 21
updated Jul 07, 2019
scope errors lie about what modules are imported

#15611 · opened Sep 06, 2018 by dmwit 8.8.1 5 Pnormal Trac import bug
- CLOSED
- 7
updated Jul 07, 2019
defer-type-errors and equality constraints

#15624 · opened Sep 10, 2018 by Krzysztof Gogolewski 8.8.1 3 Plow Trac import bug typechecker
- CLOSED
- 1
updated Jul 07, 2019
"No skolem info" panic (GHC 8.6 only)

#15629 · opened Sep 11, 2018 by Ryan Scott 8.8.1 5 Pnormal Trac import TypeInType bug compiler crash typechecker
- CLOSED
- 9
updated Jul 07, 2019
Ambiguous type variables in GeneralisedNewtypeDeriving

#15637 · opened Sep 13, 2018 by i-am-tom 8.8.1 5 Pnormal Trac import bug deriving
- CLOSED
- 4
updated Jul 07, 2019
TypeChecking of Monad patterns incorrect with RebindableSyntax and OverloadedStrings

#15645 · opened Sep 14, 2018 by Neil Mitchell 8.8.1 5 Pnormal Trac import bug ghc proposal
- CLOSED
- 11
updated Jul 07, 2019