Issues · Glasgow Haskell Compiler / GHC

New issue

ghc: panic! (the 'impossible' happened)

#15647 · created Sep 14, 2018 by monomon 8.6.1 5 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Ttask 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 Pnormal Tfeature 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug Trac import
- CLOSED
- 3
updated May 06, 2020
Core Lint error

#15664 · created Sep 21, 2018 by Icelandjack 8.6.1 5 Pnormal Tbug 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 Pnormal Tbug 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 Phigh Tbug 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 Phigh Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug Trac import
- CLOSED
- 3
- 0
updated Jun 05, 2020
Pattern signature not inferred

#15685 · created Sep 28, 2018 by Icelandjack 8.6.2 5 Pnormal PatternSynonyms Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal PatternSynonyms Tbug 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 Pnormal PatternSynonyms Tbug 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 Pnormal Tbug 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 Phighest Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Plow Ttask 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 Pnormal Tbug 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 Pnormal Tbug Trac import TypeInType
- CLOSED
- 2
updated Jul 07, 2019
GHC panic with -XDerivingVia

#15712 · created Oct 05, 2018 by Icelandjack 5 DerivingVia Pnormal Tbug Trac import
- CLOSED
- 4
updated Feb 09, 2020
Bogus -Woverlapping-patterns warning with OverloadedStrings

#15713 · created Oct 06, 2018 by quasicomputational 5 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Phigh Tbug 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 Phigh Tbug 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 Phigh Tbug 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 Pnormal Ttask 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 Pnormal Tbug Trac import code generation
- CLOSED
- 5
updated Jul 07, 2019
GHC panic with malformed pragma

#15724 · created Oct 08, 2018 by etorreborre 5 Pnormal Tbug 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 Pnormal Tbug 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 Phighest RTS Tbug 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 Pnormal Tbug 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 Phigh Tbug 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 Pnormal Ttask Trac import newcomer
- CLOSED
- 4
updated Jul 07, 2019
Testsuite failures from validate --slow

#15736 · created Oct 10, 2018 by jrp2014 10 Phighest Tbug 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 Pnormal Tbug 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 Phighest Tbug 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 Phighest Tbug 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 Pnormal Tbug 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 Pnormal Tbug Trac import
- CLOSED
- 1
updated Jul 07, 2019
panic

#15748 · created Oct 14, 2018 by awf 5 Pnormal Tbug Trac import
- CLOSED
- 6
updated Jul 07, 2019
Long Harbormaster builds

#15749 · created Oct 14, 2018 by Krzysztof Gogolewski 5 Pnormal Tbug Trac import infrastructure
- CLOSED
- 2
updated Jul 07, 2019
Investigate haddock.base perf test

#15750 · created Oct 14, 2018 by Richard Eisenberg 5 Pnormal Ttask 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug Trac import
- CLOSED
- 3
updated Jul 07, 2019
Coercion Variable Almost Devoid Checking in ForAllCo

#15757 · created Oct 17, 2018 by Ningning Xie 5 Pnormal Ttask 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 Pnormal Tbug Trac import
- CLOSED
- 8
updated Jul 07, 2019
pprFamInstLHS drops parentheses

#15761 · created Oct 17, 2018 by Richard Eisenberg 8.6.2 5 Pnormal Tbug Trac import
- CLOSED
- 1
- 3
updated Jul 07, 2019
GHC panic from PolyKinds + DataKinds

#15764 · created Oct 17, 2018 by Icelandjack 5 Pnormal Tbug Trac import
- CLOSED
- 1
updated Jul 07, 2019
Make the "extract" functions in RnTypes pure

#15765 · created Oct 17, 2018 by Richard Eisenberg 5 Pnormal Ttask Trac import
- CLOSED
- 2
updated Jul 07, 2019
GeneralizedNewtypeDeriving should support classes with ambiguous types

#15766 · created Oct 17, 2018 by reinerp 5 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Phighest Tbug 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 Pnormal Ttask 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 Pnormal Tbug 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 Pnormal Tbug 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 Phighest Tbug 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 Phigh Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tfeature 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug Trac import TypeInType
- CLOSED
- 5
updated Jul 07, 2019
typeKind confuses Type and Constraint

#15791 · created Oct 22, 2018 by Richard Eisenberg 5 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug Trac import TypeApplications
- CLOSED
- 5
updated Jul 07, 2019
shell.nix depends on build artifacts

#15794 · created Oct 23, 2018 by Vladislav Zavialov 5 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tfeature 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 Pnormal Tbug Trac import
- CLOSED
- 10
updated Jul 07, 2019
Overlapping instances error with single instance

#15800 · created Oct 24, 2018 by roland 5 Pnormal Tbug 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 Pnormal Tbug 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 Phighest Tbug Trac import runtime perf
- CLOSED
- 7
updated Jul 07, 2019
GHC panic: data T :: (a :: k) -> *

#15804 · created Oct 25, 2018 by Icelandjack 5 Pnormal Tbug Trac import TypeApplications
- CLOSED
- 9
updated Jul 07, 2019
Bug in anyRewritableTyVar

#15805 · created Oct 25, 2018 by Ningning Xie 5 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug 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 Pnormal Tbug Trac import
- CLOSED
- 2
- 9
updated Sep 19, 2019
Kind inference error in classes

#15810 · created Oct 26, 2018 by Richard Eisenberg 5 Pnormal Tbug 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 Pnormal Tfeature 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 Pnormal Tbug Tfeature request Trac import core libraries
- CLOSED
- 5
updated Jul 07, 2019