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Glasgow Haskell Compiler
GHC
Issues
Open
2,582
Closed
12,463
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Manual
Priority
Created date
Last updated
Milestone due date
Due date
Popularity
Label priority
Manual
Title
Weight
Blocking
ghc: panic! (the 'impossible' happened)
#15647
· created
Sep 14, 2018
by
monomon
8.6.1
5
P
normal
T
bug
Trac import
compiler crash
CLOSED
2
updated
Jul 07, 2019
Core Lint error with source-level unboxed equality
#15648
· created
Sep 15, 2018
by
Ryan Scott
8.8.1
5
P
normal
T
bug
Trac import
compiler crash
CLOSED
14
updated
Jul 07, 2019
Errors about ambiguous untouchable variable when using constraint variable in RankN type
#15649
· created
Sep 16, 2018
by
infinity0
8.6.1
5
P
normal
T
bug
Trac import
CLOSED
3
updated
Jul 07, 2019
Both `Ptr a` in SerializedCompact are inaccurate because of the `a`
#15653
· created
Sep 18, 2018
by
chessai
9.0.1
5
API annotations
P
normal
T
bug
Trac import
compact normal forms
CLOSED
3
updated
Jul 23, 2020
Use deriving Functor in the codebase
#15654
· created
Sep 18, 2018
by
Krzysztof Gogolewski
8.10.1
5
P
normal
T
task
Trac import
CLOSED
2
updated
Jul 07, 2019
Extend -Wall with incomplete-uni-patterns and incomplete-record-updates
#15656
· created
Sep 18, 2018
by
Chaitanya Koparkar
9.2.1
5
P
normal
T
feature request
Trac import
ghc proposal
CLOSED
1
2
40
updated
Dec 01, 2021
strange inferred kind with TypeInType
#15658
· created
Sep 19, 2018
by
dmwit
8.10.1
5
P
normal
T
bug
Trac import
ghc proposal
visible dependent quantification
CLOSED
7
updated
Jul 07, 2019
Wacky error message when RULE mentions out-of-scope variable
#15659
· created
Sep 19, 2018
by
Ryan Scott
8.8.1
5
P
normal
T
bug
Trac import
error messages
newcomer
CLOSED
1
updated
Jul 07, 2019
Line pragmas appear to be slightly broken with Clang's CPP
#15662
· created
Sep 21, 2018
by
Ben Gamari
8.10.1
5
P
normal
T
bug
Trac import
CLOSED
3
updated
May 06, 2020
Core Lint error
#15664
· created
Sep 21, 2018
by
Icelandjack
8.6.1
5
P
normal
T
bug
Trac import
TypeInType
CLOSED
6
updated
Jul 07, 2019
Dependent type synonym in recursive type family causes GHC to panic
#15666
· created
Sep 22, 2018
by
tydeu
8.6.1
5
P
normal
T
bug
Trac import
compiler crash
newcomer
CLOSED
8
updated
Jul 07, 2019
Readonly permissions bits are wrong
#15667
· created
Sep 23, 2018
by
Tamar Christina
8.6.2
7
P
high
T
bug
Trac import
CLOSED
2
updated
Jul 07, 2019
T7040_ghci has a suspicious testcase failure
#15669
· created
Sep 23, 2018
by
Tamar Christina
8.8.1
7
P
high
T
bug
Trac import
CLOSED
3
updated
Jul 07, 2019
FloatFnInverses seems to show some weird rounding/precision issues.
#15670
· created
Sep 23, 2018
by
Tamar Christina
8.6.1
5
P
normal
T
bug
Trac import
Windows
broken test
CLOSED
4
1
updated
Apr 08, 2022
Link errors due to forcibly exporting findPtr
#15671
· created
Sep 23, 2018
by
Tamar Christina
8.8.1
5
P
normal
T
bug
Trac import
CLOSED
7
updated
Jul 07, 2019
heap overflow with Bits.shift and Integer
#15673
· created
Sep 24, 2018
by
mcmayer
8.8.1
5
P
normal
T
bug
Trac import
CLOSED
8
updated
Jul 07, 2019
Type operators in existential context cannot be parsed
#15675
· created
Sep 25, 2018
by
Vladislav Zavialov
8.8.1
5
P
normal
T
bug
Trac import
parser
CLOSED
3
updated
Jul 07, 2019
Use String rather than [Char] where possible
#15679
· created
Sep 26, 2018
by
Simon Peyton Jones
8.6.1
5
P
normal
T
bug
Trac import
CLOSED
3
0
updated
Jun 05, 2020
Pattern signature not inferred
#15685
· created
Sep 28, 2018
by
Icelandjack
8.6.2
5
P
normal
PatternSynonyms
T
bug
Trac import
CLOSED
5
updated
Jul 07, 2019
Different results depending on if the code was compiled with or without optimizations
#15686
· created
Sep 28, 2018
by
Darwin226
8.4.1
5
P
normal
T
bug
Trac import
incorrect runtime result
CLOSED
1
updated
Jul 07, 2019
Marking Pred(S n) = n as injective
#15691
· created
Sep 30, 2018
by
Icelandjack
8.6.1
5
P
normal
T
bug
Trac import
TypeFamilies
injective type families
typechecker
CLOSED
2
updated
Jul 07, 2019
GHC panic from pattern synonyms + deferred type errors
#15692
· created
Sep 30, 2018
by
Icelandjack
8.6.2
5
P
normal
PatternSynonyms
T
bug
Trac import
TypeInType
compiler crash
CLOSED
6
updated
Jul 07, 2019
GHC panic from pattern synonym, "Type-correct unfilled coercion hole"
#15694
· created
Sep 30, 2018
by
Icelandjack
8.6.1
5
P
normal
PatternSynonyms
T
bug
Trac import
CLOSED
3
updated
Jul 07, 2019
Core Lint error, from -fobject-code + defer type errors + pattern synonyms + other stuff
#15695
· created
Sep 30, 2018
by
Icelandjack
8.6.2
5
P
normal
T
bug
Trac import
compiler crash
CLOSED
4
updated
Jul 07, 2019
Derived Ord instance for enumerations with more than 8 elements seems to be incorrect
#15696
· created
Oct 02, 2018
by
mrkkrp
8.6.2
10
P
highest
T
bug
Trac import
incorrect runtime result
CLOSED
89
updated
Apr 26, 2022
Plugins cause GHC to panic: cannot find dynamic libraries
#15700
· created
Oct 02, 2018
by
sheaf
8.6.2
5
P
normal
T
bug
Trac import
compiler crash
CLOSED
14
updated
Jul 07, 2019
HEAD: Build failure in ghc-prim
#15701
· created
Oct 03, 2018
by
Peter Trommler
8.8.1
5
P
normal
T
bug
Trac import
ghc build failure
CLOSED
2
updated
Jul 07, 2019
"-main-is" flag is broken for recent ghc-head
#15702
· created
Oct 03, 2018
by
Cheng Shao
8.8.1
5
P
normal
T
bug
Trac import
error messages
CLOSED
6
updated
Jul 07, 2019
Different saturations of the same polymorphic-kinded type constructor aren't seen as apart types
#15704
· created
Oct 04, 2018
by
mniip
8.6.1
5
P
normal
T
bug
Trac import
TypeFamilies
typechecker
CLOSED
8
updated
Jul 07, 2019
Refactor NewHsTypeX to DerivedCoreTy
#15706
· created
Oct 05, 2018
by
Vladislav Zavialov
9.0.1
3
P
low
T
task
Trac import
CLOSED
2
5
updated
Dec 19, 2020
GHC panic using TypeInType with minimal source code
#15709
· created
Oct 05, 2018
by
jnape
5
P
normal
T
bug
Trac import
TypeInType
compiler crash
CLOSED
2
updated
Jul 07, 2019
Kind inference of class variables does not examine associated types
#15711
· created
Oct 05, 2018
by
Richard Eisenberg
5
P
normal
T
bug
Trac import
TypeInType
CLOSED
2
updated
Jul 07, 2019
GHC panic with -XDerivingVia
#15712
· created
Oct 05, 2018
by
Icelandjack
5
DerivingVia
P
normal
T
bug
Trac import
CLOSED
4
updated
Feb 09, 2020
Bogus -Woverlapping-patterns warning with OverloadedStrings
#15713
· created
Oct 06, 2018
by
quasicomputational
5
P
normal
T
bug
Trac import
pattern match warnings
CLOSED
2
0
updated
Jul 07, 2019
Compacting StaticPtr of a function doesn't work
#15714
· created
Oct 06, 2018
by
Ömer Sinan Ağacan
5
P
normal
T
bug
Trac import
CLOSED
4
updated
Jul 07, 2019
problematic openFile with named pipes
#15715
· created
Oct 07, 2018
by
adp
8.6.3
5
API annotations
P
normal
T
bug
Trac import
core libraries
incorrect runtime result
CLOSED
5
updated
Jul 07, 2019
GHC hangs on default implementation of type family
#15716
· created
Oct 07, 2018
by
Heimdell
8.4.1
7
P
high
T
bug
Trac import
compiler crash
CLOSED
3
updated
Jul 07, 2019
Build panic on ghc-8.6.1 under FreeBSD when using -fllvm
#15718
· created
Oct 08, 2018
by
gwright@antiope.com
8.8.1
7
P
high
T
bug
Trac import
compiler crash
CLOSED
8
updated
Jul 07, 2019
Command `:show bindings` throws exception for bindings without `let`
#15721
· created
Oct 08, 2018
by
Tao He
8.8.1
7
GHCi
P
high
T
bug
Trac import
newcomer
CLOSED
5
updated
Jul 07, 2019
Add -Wstar-is-type to the User's Guide
#15722
· created
Oct 08, 2018
by
Vladislav Zavialov
8.6.2
5
P
normal
T
task
Trac import
documentation
CLOSED
1
updated
Jul 07, 2019
-prof -fPIC -fexternal-dynamic-refs generates non-PIC relocations for external symbol
#15723
· created
Oct 08, 2018
by
Zejun Wu
8.10.1
5
P
normal
T
bug
Trac import
code generation
CLOSED
5
updated
Jul 07, 2019
GHC panic with malformed pragma
#15724
· created
Oct 08, 2018
by
etorreborre
5
P
normal
T
bug
Trac import
CLOSED
2
updated
Jul 07, 2019
Core Lint error: Trans coercion mis-match
#15725
· created
Oct 09, 2018
by
Ryan Scott
8.8.1
5
P
normal
T
bug
Trac import
compiler crash
CLOSED
9
updated
Jul 07, 2019
Program with safe array operations triggers debug runtime assertion
#15728
· created
Oct 09, 2018
by
Ömer Sinan Ağacan
10
P
highest
RTS
T
bug
Trac import
CLOSED
7
updated
Jul 07, 2019
Static GHCi can segfault when accessing .bss section in C
#15729
· created
Oct 09, 2018
by
Zejun Wu
8.10.1
5
GHCi
P
normal
T
bug
Trac import
CLOSED
6
updated
Jul 07, 2019
SCC/HPC/CORE annotation can change the meaning of an expression
#15730
· created
Oct 09, 2018
by
Vladislav Zavialov
7
P
high
T
bug
Trac import
incorrect runtime result
parser
CLOSED
1
7
updated
Jan 02, 2020
Several links in GHC.Exts.Heap documentation are broken
#15733
· created
Oct 10, 2018
by
Matthew Pickering
8.8.1
5
P
normal
T
task
Trac import
newcomer
CLOSED
4
updated
Jul 07, 2019
Testsuite failures from validate --slow
#15736
· created
Oct 10, 2018
by
jrp2014
10
P
highest
T
bug
Trac import
incorrect runtime result
testsuite
CLOSED
26
updated
May 31, 2020
-ddump-splices omits required parentheses around quantified constraints
#15738
· created
Oct 11, 2018
by
Ryan Scott
8.8.1
5
P
normal
T
bug
TemplateHaskell
Trac import
CLOSED
2
updated
Jul 07, 2019
Type family with higher-rank result is too accepting
#15740
· created
Oct 11, 2018
by
Richard Eisenberg
8.8.1
10
P
highest
T
bug
Trac import
TypeFamilies
TypeInType
CLOSED
7
updated
Jul 07, 2019
GHC configure step can fail when CC=clang
#15742
· created
Oct 12, 2018
by
judah
8.8.2
5
P
highest
T
bug
Trac import
CLOSED
5
1
3
updated
Jan 07, 2020
Nail down the Required/Inferred/Specified story
#15743
· created
Oct 12, 2018
by
Simon Peyton Jones
5
P
normal
T
bug
Trac import
CLOSED
14
updated
Jul 07, 2019
GHC panics when builds for arm as: ghc-stage1: panic! (the 'impossible' happened): padLiveArgs -- i > regNum ??
#15747
· created
Oct 14, 2018
by
Sergei Trofimovich
5
LLVM backend
P
normal
T
bug
Trac import
CLOSED
1
updated
Jul 07, 2019
panic
#15748
· created
Oct 14, 2018
by
awf
5
P
normal
T
bug
Trac import
CLOSED
6
updated
Jul 07, 2019
Long Harbormaster builds
#15749
· created
Oct 14, 2018
by
Krzysztof Gogolewski
5
P
normal
T
bug
Trac import
infrastructure
CLOSED
2
updated
Jul 07, 2019
Investigate haddock.base perf test
#15750
· created
Oct 14, 2018
by
Richard Eisenberg
5
P
normal
T
task
Trac import
testsuite
CLOSED
1
updated
Jul 07, 2019
Inconsistent pattern-match warnings when using guards versus case expressions
#15753
· created
Oct 16, 2018
by
Ryan Scott
8.10.1
5
P
normal
T
bug
Trac import
error messages
pattern match warnings
CLOSED
3
19
updated
Sep 18, 2019
Move free variable computation to after STG passes
#15754
· created
Oct 16, 2018
by
Ben Gamari
8.8.1
5
P
normal
T
bug
Trac import
CLOSED
14
updated
Jul 07, 2019
randomRIO panic on (GHC version 8.4.3 for x86_64-apple-darwin)
#15755
· created
Oct 17, 2018
by
cmal
5
P
normal
T
bug
Trac import
CLOSED
3
updated
Jul 07, 2019
Coercion Variable Almost Devoid Checking in ForAllCo
#15757
· created
Oct 17, 2018
by
Ningning Xie
5
P
normal
T
task
Trac import
CLOSED
3
updated
Jul 07, 2019
hsc2hs broken due to incorrect argument passing to the hsc2hs executable
#15758
· created
Oct 17, 2018
by
Ömer Sinan Ağacan
5
P
normal
T
bug
Trac import
CLOSED
8
updated
Jul 07, 2019
pprFamInstLHS drops parentheses
#15761
· created
Oct 17, 2018
by
Richard Eisenberg
8.6.2
5
P
normal
T
bug
Trac import
CLOSED
1
3
updated
Jul 07, 2019
GHC panic from PolyKinds + DataKinds
#15764
· created
Oct 17, 2018
by
Icelandjack
5
P
normal
T
bug
Trac import
CLOSED
1
updated
Jul 07, 2019
Make the "extract" functions in RnTypes pure
#15765
· created
Oct 17, 2018
by
Richard Eisenberg
5
P
normal
T
task
Trac import
CLOSED
2
updated
Jul 07, 2019
GeneralizedNewtypeDeriving should support classes with ambiguous types
#15766
· created
Oct 17, 2018
by
reinerp
5
P
normal
T
bug
Trac import
CLOSED
1
updated
Jul 07, 2019
"StgCmmEnv: variable not found" with FunctionalDependencies and FlexibleContexts
#15767
· created
Oct 17, 2018
by
roland
8.6.2
5
P
normal
T
bug
Trac import
compiler crash
CLOSED
1
5
updated
Jul 07, 2019
Using oneshot kqueue() on macOS
#15768
· created
Oct 18, 2018
by
kazu-yamamoto
9.0.1
10
P
normal
T
bug
Trac import
core libraries
macOS
CLOSED
12
8
updated
Feb 11, 2022
GHC 8.6 for macOS depends on homebrew
#15769
· created
Oct 18, 2018
by
kazu-yamamoto
8.6.2
10
P
highest
T
bug
Trac import
CLOSED
8
updated
Jul 07, 2019
Could there be further refactoring to the `seq` typing rule
#15771
· created
Oct 18, 2018
by
Arnaud Spiwack
5
P
normal
T
task
Trac import
CLOSED
1
updated
Nov 23, 2019
Strange constraint error that disappears when adding another top-level declaration
#15772
· created
Oct 18, 2018
by
Andres Löh
5
P
normal
T
bug
Trac import
typechecker
CLOSED
14
updated
Dec 26, 2020
Ordering of code in file affects compilation
#15777
· created
Oct 18, 2018
by
chessai
8.6.2
5
P
normal
T
bug
Trac import
CLOSED
5
updated
Jul 07, 2019
GHC HEAD-only panic (zonkTcTyVarToTyVar)
#15778
· created
Oct 18, 2018
by
Ryan Scott
8.8.1
10
P
highest
T
bug
Trac import
TypeInType
compiler crash
typechecker
CLOSED
7
updated
Jul 07, 2019
ghc-8.4.4 failed to build on armv7 and aarch64
#15780
· created
Oct 19, 2018
by
Jens Petersen
8.6.3
7
P
high
T
bug
Trac import
ghc build failure
CLOSED
7
updated
Jul 07, 2019
Extraneous parentheses required to parse kind signature on the RHS of a type synonym
#15781
· created
Oct 19, 2018
by
Ryan Scott
8.8.1
5
P
normal
T
bug
Trac import
parser
CLOSED
2
updated
Jul 07, 2019
Quoting an internal variable causes an error when splicing
#15783
· created
Oct 19, 2018
by
Matthew Pickering
8.8.1
5
P
normal
T
bug
Trac import
CLOSED
5
updated
Apr 07, 2021
Hi Haddock: Enable haddock to generate docs from .hi-files
#15786
· created
Oct 20, 2018
by
Simon Jakobi
9.4.1
5
P
normal
T
feature request
Trac import
documentation
haddock
CLOSED
4
updated
Mar 23, 2022
GHC panic using kind application
#15787
· created
Oct 20, 2018
by
Icelandjack
8.6.2
5
P
normal
T
bug
Trac import
TypeApplications
TypeInType
CLOSED
1
5
updated
Jul 07, 2019
Core Lint error, from visible kind applications
#15788
· created
Oct 20, 2018
by
Icelandjack
8.8.1
5
P
normal
T
bug
Trac import
CLOSED
5
updated
Jul 07, 2019
GHC panic using visible kind applications and a higher-rank kind
#15789
· created
Oct 20, 2018
by
Icelandjack
5
P
normal
T
bug
Trac import
TypeInType
CLOSED
5
updated
Jul 07, 2019
typeKind confuses Type and Constraint
#15791
· created
Oct 22, 2018
by
Richard Eisenberg
5
P
normal
T
bug
Trac import
CLOSED
6
updated
Jul 07, 2019
TH reification prints invisible arguments to rank-2-kinded type as visible
#15792
· created
Oct 22, 2018
by
Ryan Scott
8.8.1
5
P
normal
T
bug
TemplateHaskell
Trac import
CLOSED
2
updated
Jul 07, 2019
Type family doesn't reduce with visible kind application
#15793
· created
Oct 23, 2018
by
Icelandjack
8.8.1
5
P
normal
T
bug
Trac import
TypeApplications
CLOSED
5
updated
Jul 07, 2019
shell.nix depends on build artifacts
#15794
· created
Oct 23, 2018
by
Vladislav Zavialov
5
P
normal
T
bug
Trac import
ghc build failure
hadrian
CLOSED
3
updated
Jul 31, 2019
Core lint error with unused kind variable in data type return kind
#15795
· created
Oct 24, 2018
by
Icelandjack
5
P
normal
T
bug
Trac import
TypeApplications
TypeInType
CLOSED
8
updated
Jul 07, 2019
Core Lint error with invalid newtype declaration
#15796
· created
Oct 24, 2018
by
Icelandjack
8.6.2
5
P
normal
T
bug
Trac import
compiler crash
typechecker
CLOSED
1
8
updated
Jul 07, 2019
GHC panic using visible kind application
#15797
· created
Oct 24, 2018
by
Icelandjack
8.8.1
5
P
normal
T
bug
Trac import
TypeApplications
CLOSED
2
updated
Jul 07, 2019
Flag to warn when deriving strategy is not explicitly specified
#15798
· created
Oct 24, 2018
by
Andrew Martin
8.8.1
5
P
normal
T
feature request
Trac import
newcomer
CLOSED
5
updated
Oct 06, 2019
GHC panic (and warnings)
#15799
· created
Oct 24, 2018
by
Icelandjack
8.10.1
5
P
normal
T
bug
Trac import
CLOSED
10
updated
Jul 07, 2019
Overlapping instances error with single instance
#15800
· created
Oct 24, 2018
by
roland
5
P
normal
T
bug
Trac import
CLOSED
3
updated
Jul 07, 2019
"ASSERT failed!" with visible kind applications
#15801
· created
Oct 24, 2018
by
Icelandjack
8.8.1
5
P
normal
T
bug
Trac import
TypeApplications
CLOSED
5
updated
Jul 07, 2019
Inlining of constant fails when both cross-module and recursive
#15802
· created
Oct 25, 2018
by
j6carey
10
P
highest
T
bug
Trac import
runtime perf
CLOSED
7
updated
Jul 07, 2019
GHC panic: data T :: (a :: k) -> *
#15804
· created
Oct 25, 2018
by
Icelandjack
5
P
normal
T
bug
Trac import
TypeApplications
CLOSED
9
updated
Jul 07, 2019
Bug in anyRewritableTyVar
#15805
· created
Oct 25, 2018
by
Ningning Xie
5
P
normal
T
bug
Trac import
CLOSED
1
4
updated
Jul 07, 2019
Impredicativity behavior in `:k` command in GHCi
#15806
· created
Oct 25, 2018
by
Ningning Xie
8.6.2
5
P
normal
T
bug
Trac import
CLOSED
1
3
updated
Jul 07, 2019
GHC panic with visible kind applications
#15807
· created
Oct 25, 2018
by
Icelandjack
8.8.1
5
P
normal
T
bug
Trac import
TypeApplications
CLOSED
2
updated
Jul 07, 2019
Loading libraries with FFI exports may cause segfaults in the compiler if they are loaded far from the rts in memory.
#15808
· created
Oct 25, 2018
by
Andreas Klebinger
5
P
normal
T
bug
Trac import
Windows
compiler crash
linking
CLOSED
6
27
updated
Nov 14, 2020
Use level numbers for generalisation
#15809
· created
Oct 26, 2018
by
Simon Peyton Jones
5
P
normal
T
bug
Trac import
CLOSED
2
9
updated
Sep 19, 2019
Kind inference error in classes
#15810
· created
Oct 26, 2018
by
Richard Eisenberg
5
P
normal
T
bug
Trac import
CLOSED
9
updated
Jul 07, 2019
Comment out CONSTANT_FOLDED annotation for some GHC.Natural functions
#15811
· created
Oct 26, 2018
by
darchon
8.6.2
5
P
normal
T
feature request
Trac import
CLOSED
2
updated
Jul 07, 2019
add System.Mem.Address to base
#15812
· created
Oct 26, 2018
by
Carter Schonwald
8.10.1
5
P
normal
T
bug
T
feature request
Trac import
core libraries
CLOSED
5
updated
Jul 07, 2019
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