Issues · Glasgow Haskell Compiler / GHC

New issue

Type family & typeclass interaction suppresses errors

#15962 · created Nov 28, 2018 by madgen 8.8.1 5 Pnormal Tbug Trac import TypeFamilies error messages newcomer typechecker
- CLOSED
- 2
updated Jul 07, 2019
PartialTypeSignatures warnings should be turned off with -Wno-partial-type-signatures

#15964 · created Nov 28, 2018 by Matthew Pickering 8.6.3 5 Pnormal Tbug Trac import
- CLOSED
- 2
updated Jul 07, 2019
can't build ghc on Mac with any level of dwarf for base library

#15967 · created Nov 28, 2018 by Carter Schonwald 8.6.3 10 Phighest Tbug Trac import code generation debug information
- CLOSED
- 7
updated Jul 07, 2019
configure doesn't error out when --enable-dwarf-unwind is given but libdw cannot be found

#15968 · created Nov 29, 2018 by Niklas Hambüchen 8.8.1 5 Pnormal Tbug Trac import
- CLOSED
- 4
updated Jul 05, 2021
Recompilation bug with default class methods

#15970 · created Nov 29, 2018 by Simon Marlow 8.6.4 10 Phighest Tbug Trac import compiler crash
- CLOSED
- 6
updated Jul 07, 2019
Hadrian fails Shake's linter on Windows

#15971 · created Nov 29, 2018 by Ben Gamari 8.8.1 7 Phigh Tbug Trac import
- CLOSED
- 14
updated Feb 28, 2020
Test nofib tests for correctness in CI

#15972 · created Nov 29, 2018 by Ben Gamari 8.9 7 Phigh Tbug Trac import infrastructure well-typed priorities
- CLOSED
- 5
updated Mar 05, 2021
QuantifiedConstraints: Spurious error involving superclass constraints

#15974 · created Nov 29, 2018 by Alexis King 8.6.3 5 Pnormal QuantifiedConstraints Tbug Trac import
- CLOSED
- 3
updated Jul 07, 2019
slow test suite failures on 8.6 DARWIN :

#15978 · created Nov 30, 2018 by Carter Schonwald 8.6.3 5 Pnormal Tbug Trac import
- CLOSED
- 2
updated Dec 03, 2021
unpin a mutable byte array

#15980 · created Nov 30, 2018 by Andrew Martin 8.6.3 5 Pnormal Ttask Trac import
- CLOSED
- 4
updated Jul 07, 2019
Implement the Linear Types proposal

#15981 · created Nov 30, 2018 by Arnaud Spiwack 9.0.1 5 LinearTypes Pnormal Ttask Trac import
- CLOSED
- 1
- 4
updated Jan 25, 2021
Hadrian's `--configure` flag is broken on Windows

#15982 · created Dec 01, 2018 by Andrey Mokhov 8.8.1 7 Phigh Tbug Trac import Windows hadrian
- CLOSED
- 8
updated Sep 20, 2019
`pprint EqualityT` infinitely loops

#15985 · created Dec 02, 2018 by Ryan Scott 8.8.1 5 Pnormal Tbug TemplateHaskell Trac import
- CLOSED
- 2
updated Jul 07, 2019
Poor error message source location reporting with unsaturated type family

#15986 · created Dec 02, 2018 by Ryan Scott 8.8.1 5 Pnormal Tbug Trac import TypeFamilies error messages
- CLOSED
- 2
updated Jul 07, 2019
GHC sometimes not computing open type family application in kind inference

#15987 · created Dec 02, 2018 by sheaf 5 Pnormal Tbug Trac import
- CLOSED
- 4
updated Jan 25, 2021
Bitwise-oriented semigroup and monoid newtype wrappers for Data.Bits.Bits instances

#15993 · created Dec 04, 2018 by koz_ 9.2.1 5 Pnormal Tfeature request Trac import core libraries
- CLOSED
- 2
- 37
updated Jan 23, 2021
Duplicate entries in -ddump-minimal-imports

#15994 · created Dec 05, 2018 by Simon Peyton Jones 8.6.3 5 Pnormal Tbug Trac import
- CLOSED
- 1
updated Jul 07, 2019
Make Control.Concurrent.QSem a newtype

#15995 · created Dec 05, 2018 by chessai 8.8.1 5 Pnormal Tfeature request Trac import core libraries
- CLOSED
- 3
updated Jul 07, 2019
Stabilise nofib runtime measurements

#15999 · created Dec 05, 2018 by Sebastian Graf ⊥ 5 Pnormal Ttask Trac import nofib
- CLOSED
- 10
updated Oct 13, 2020
Don't suggest Rank2Types and RankNTypes, only the latter

#16000 · created Dec 05, 2018 by chessai 8.6.3 5 Pnormal Tfeature request Trac import parser
- CLOSED
- 4
updated Jul 07, 2019
hadrian doesn't support setting intree gmp configuration explicitly

#16001 · created Dec 05, 2018 by Carter Schonwald 8.8.1 5 Pnormal Tbug Trac import hadrian
- CLOSED
- 6
updated Jul 07, 2019
Type family equation with wrong name is silently accepted (GHC 8.6+ only)

#16002 · created Dec 05, 2018 by Ryan Scott 8.8.1 5 Pnormal Tbug Trac import TypeFamilies
- CLOSED
- 7
updated Aug 21, 2021
Average and maximum residency numbers in nofib broken

#16003 · created Dec 06, 2018 by Sebastian Graf ⊥ 5 Pnormal Tbug Trac import nofib
- CLOSED
- 2
updated Jul 07, 2019
Don't use a generic apply thunk for known calls

#16005 · created Dec 06, 2018 by Sebastian Graf 8.8.1 5 Pnormal Ttask Trac import
- CLOSED
- 1
updated Jul 07, 2019
Framework failures when validating

#16006 · created Dec 07, 2018 by Ömer Sinan Ağacan 8.10.1 5 Pnormal Tbug Trac import testsuite
- CLOSED
- 1
updated Jul 07, 2019
GHC HEAD type family regression involving invisible arguments

#16008 · created Dec 07, 2018 by Ryan Scott 8.8.1 10 Phighest Tbug Trac import TypeFamilies TypeInType typechecker
- CLOSED
- 6
updated Jul 07, 2019
Broken Link in Data.OldList

#16010 · created Dec 08, 2018 by Sven Tennie ⊥ 0 Plow Ttask Trac import core libraries documentation
- CLOSED
- 3
updated Jul 07, 2019
set/getAllocationCounter is broken in GHCi

#16012 · created Dec 08, 2018 by Andreas Klebinger 9.0.1 5 GHCi Pnormal Tbug Trac import
- CLOSED
- 4
- 13
updated Jul 21, 2020
:kind! accepts unsaturated type aliases

#16013 · created Dec 08, 2018 by dmwit 8.8.1 5 Pnormal Tbug Trac import
- CLOSED
- 11
updated Jul 07, 2019
git notes logic breaks CircleCI validation of pull requests

#16015 · created Dec 08, 2018 by Ben Gamari 8.6.3 10 Phighest Tbug Trac import
- CLOSED
- 4
updated Jul 07, 2019
Hadrian build fails on FreeBSD

#16016 · created Dec 08, 2018 by Ben Gamari Make removal 7 Phigh Tbug Trac import hadrian
- CLOSED
- 6
updated Jun 08, 2021
Harbormaster: OS X build fails

#16019 · created Dec 09, 2018 by Peter Trommler 8.8.1 10 Phighest RTS Tbug Trac import ghc build failure
- CLOSED
- 7
updated Jul 07, 2019
Hadrian: correctly Install libffi shared object files

#16020 · created Dec 09, 2018 by davide 8.6.3 7 Phigh Ttask Trac import hadrian
- CLOSED
- 2
updated Jul 07, 2019
Can't bootstrap GHC HEAD with GHC 8.6 on Windows

#16023 · created Dec 09, 2018 by Ben Gamari 8.8.1 10 Phighest Tbug Trac import
- CLOSED
- 1
- 3
updated Jul 07, 2019
Kind Signatures on data instances

#16024 · created Dec 10, 2018 by Andrew Martin 8.6.3 5 Pnormal Tbug Trac import
- CLOSED
- 3
updated Jul 07, 2019
Makefiles bundled with source distribution fail to build cross-compiler.

#16025 · created Dec 10, 2018 by vanessamchale 8.8.1 5 Pnormal Tbug Trac import ghc build failure
- CLOSED
- 3
updated Jul 07, 2019
No way to run a subset of the testsuite

#16026 · created Dec 10, 2018 by Ben Gamari 8.8.1 7 Phigh Tfeature request Trac import hadrian
- CLOSED
- 10
updated Jul 07, 2019
Inadequate absence analysis

#16029 · created Dec 10, 2018 by Simon Peyton Jones 8.6.3 5 Pnormal Tbug Trac import
- CLOSED
- 2
updated Jul 07, 2019
Poor pretty-printing of GADT constructors in GHCi

#16030 · created Dec 11, 2018 by Ryan Scott 8.8.1 5 Pnormal Tbug Trac import
- CLOSED
- 5
updated Jul 07, 2019
Show instance for Data.Fixed does not show parentheses for negatives

#16031 · created Dec 11, 2018 by skeuchel 8.8.1 5 Pnormal Tbug Trac import core libraries incorrect runtime result newcomer
- CLOSED
- 4
updated Jul 07, 2019
Rank-n typechecking regression between GHC 8.4 and 8.6

#16033 · created Dec 11, 2018 by Ryan Scott 8.8.1 5 Pnormal RankNTypes Tbug Trac import typechecker
- CLOSED
- 4
updated Jul 07, 2019
memcpy test inexplicably failing

#16037 · created Dec 12, 2018 by Ben Gamari 8.10.1 7 Phigh Tbug Trac import
- CLOSED
- 2
updated Jan 23, 2020
Simplifier incorrectly breaks recursive groups

#16038 · created Dec 12, 2018 by Ömer Sinan Ağacan 10 Phighest Tbug Trac import
- CLOSED
- 10
updated Jul 07, 2019
Unboxing-Related Performance Issue with Polymorphic Functions

#16040 · created Dec 12, 2018 by Ara Adkins 5 CPR/boxity analysis Pnormal Tbug Trac import runtime perf
- CLOSED
- 14
updated Mar 16, 2022
T13031 doesn't get run

#16042 · created Dec 12, 2018 by Ben Gamari 5 Pnormal Tbug Trac import
- CLOSED
- 2
- 4
updated Oct 17, 2019
Lots of testsuite output breaks with integer-simple

#16043 · created Dec 12, 2018 by Ben Gamari 8.10.1 5 Pnormal Tbug Trac import
- CLOSED
- 4
updated Jul 07, 2019
-fno-stack-protector still necessary?

#16046 · created Dec 13, 2018 by clumens 8.8.1 5 Pnormal Tbug Trac import
- CLOSED
- 6
updated Jul 28, 2021
Core optimizations for memset on a small range

#16052 · created Dec 15, 2018 by Andrew Martin 8.9 5 Pnormal Ttask Trac import newcomer
- CLOSED
- 2
- 18
updated Mar 25, 2020
GHC build regression ("HSghc-prim-0.5.3.p_o: copyFile: does not exist")

#16053 · created Dec 15, 2018 by Herbert Valerio Riedel 8.8.1 10 Phighest Tbug Trac import ghc build failure
- CLOSED
- 12
updated Oct 09, 2020
Unable to build stage3 with hadrian

#16054 · created Dec 15, 2018 by Matthew Pickering 5 Pnormal Tbug Trac import
- CLOSED
- 2
updated Jul 07, 2019
Hadrian failure: Values have changed since being depended upon

#16056 · created Dec 16, 2018 by Ben Gamari 8.8.1 7 Phigh Tbug Trac import ghc build failure hadrian
- CLOSED
- 4
updated Jul 07, 2019
GHC 8.6.3 byte-code interpreter segfaults on any object.

#16057 · created Dec 16, 2018 by gizmo.mk0 8.6.4 10 Phighest RTS Tbug TemplateHaskell Trac import compiler crash
- CLOSED
- 22
updated Jul 07, 2019
GHC built on macOS Mojave nondeterministically segfaults

#16058 · created Dec 16, 2018 by Ben Gamari 8.8.1 10 Phighest Tbug Trac import ghc build failure
- CLOSED
- 4
updated Jul 07, 2019
checkValidType is defeated by a type synonym

#16059 · created Dec 17, 2018 by Ryan Scott 8.8.1 5 Pnormal Tbug Trac import typechecker
- CLOSED
- 17
updated Jul 14, 2020
Improve -dynamic-too progress messages

#16062 · created Dec 17, 2018 by Ömer Sinan Ağacan 0 Plow Ttask Trac import newcomer
- CLOSED
- 2
- 1
updated Jul 07, 2019
Don't do stack squeezing during context switches in single-threaded programs to guarantee determinism in allocations

#16065 · created Dec 18, 2018 by Sebastian Graf ⊥ 5 Pnormal RTS Ttask Trac import
- CLOSED
- 10
updated Jan 16, 2020
internal error: PAP object entered!

#16066 · created Dec 18, 2018 by dnspies 8.8.1 10 Phighest Tbug Trac import runtime crash
- CLOSED
- 1
- 59
updated Feb 25, 2020
Profiled GHCi segfaults under Windows.

#16067 · created Dec 18, 2018 by Andreas Klebinger 5 GHCi Pnormal RTS Tbug Trac import Windows
- CLOSED
- 3
updated Aug 28, 2019
Unsaturated type synonyms as arguments work in 8.6.3 but not HEAD

#16068 · created Dec 19, 2018 by quasicomputational 5 Pnormal Tbug Trac import
- CLOSED
- 2
updated Jul 07, 2019
Proposal to resolve some confusion about stages in Hadrian

#16069 · created Dec 19, 2018 by Matthew Pickering 5 Pnormal Tbug Trac import
- CLOSED
- 4
updated Jul 07, 2019
GHC is stuck (runs indefinitely) compiling a module

#16071 · created Dec 19, 2018 by dirtypaw 5 Pnormal Tbug Trac import ghc build failure
- CLOSED
- 3
updated Jul 07, 2019
Hadrian build fails on Windows

#16073 · created Dec 19, 2018 by Ben Gamari 8.8.1 7 Phigh Tbug Trac import Windows hadrian
- CLOSED
- 16
updated Jul 07, 2019
Hopelessly confusing error involving runtime-reps

#16074 · created Dec 19, 2018 by Simon Peyton Jones 5 Pnormal Tbug Trac import
- CLOSED
- 3
updated Aug 06, 2021
Weverything ignores some OPTIONS_GHC flags

#16075 · created Dec 19, 2018 by Eric Crockett 5 Pnormal Tbug Trac import error messages
- CLOSED
- 3
updated Jul 07, 2019
AvailTC Invariant being violated

#16077 · created Dec 20, 2018 by Alec Theriault 8.8.1 5 Pnormal Tbug Trac import
- CLOSED
- 3
updated Jul 07, 2019
runTestTT from ghci caused a panic.

#16079 · created Dec 21, 2018 by emacstheviking 5 Pnormal Tbug Trac import compiler crash
- CLOSED
- 1
updated Jul 07, 2019
runTestTT from ghci caused a panic.

#16080 · created Dec 21, 2018 by emacstheviking 5 Pnormal Tbug Trac import compiler crash
- CLOSED
- 3
updated Jul 07, 2019
tests relying on <iostream> are broken on Mojave builder

#16083 · created Dec 22, 2018 by Ben Gamari 5 Pnormal Tbug Trac import broken test
- CLOSED
- 2
- 4
updated Nov 19, 2021
Improve link times on Windows by using LLD for linking

#16084 · created Dec 22, 2018 by Ben Gamari 9.4.1 7 Phigh Tbug Trac import Windows compiler perf upstream
- CLOSED
- 1
- 22
updated Apr 08, 2022
Compile countLeadingZeros to lzcnt if -mbmi2 is set

#16086 · created Dec 22, 2018 by Dmitry Ivanov 8.10.1 3 Plow Tfeature request Trac import code generation
- CLOSED
- 1
updated Jul 07, 2019
The 'impossible' happened when I was trying to use getCurrentDirectory in repl in spacemacs.

#16088 · created Dec 23, 2018 by hanrai 5 Pnormal Tbug Trac import
- CLOSED
- 4
updated Jul 07, 2019
seq is not cooperating with :sprint in GHCi as expected

#16089 · created Dec 23, 2018 by radrow 8.8.1 5 GHCi Pnormal Tbug Trac import incorrect runtime result
- CLOSED
- 15
updated Jul 07, 2019
Typeset Big-O complexities with TeX-style notation in libraries/base

#16090 · created Dec 23, 2018 by Sven Tennie 5 Pnormal Ttask Trac import core libraries
- CLOSED
- 4
updated Jul 07, 2019
arith011 broken with integer-simple

#16091 · created Dec 23, 2018 by Ben Gamari 8.8.1 5 Pnormal Tbug Trac import
- CLOSED
- 1
updated Jul 07, 2019
Bug when trying to combine two lists

#16092 · created Dec 23, 2018 by sutbult 5 Pnormal Tbug Trac import ghc build failure
- CLOSED
- 2
updated Jul 07, 2019
mkPluginUsage: file not found

#16093 · created Dec 23, 2018 by Levent Erkök 5 Pnormal Tbug Trac import
- CLOSED
- 2
- 12
updated Jun 08, 2021
panic! (the 'impossible' happened): for powerpc-unknown-linux getRegister(ppc): I64[I32[BaseReg + 812] + 64]

#16094 · created Dec 24, 2018 by Sergei Trofimovich 5 Pnormal Tbug Trac import ghc build failure
- CLOSED
- 12
updated Jul 07, 2019
let x = ... and x = ... are not the same in GHCi

#16096 · created Dec 26, 2018 by Ömer Sinan Ağacan 8.8.1 5 GHCi Pnormal Tbug Trac import
- CLOSED
- 10
updated Jul 07, 2019
T11627a fails sometimes on CI

#16100 · created Dec 27, 2018 by Matthew Pickering 5 CI breakage Pnormal Tbug Trac import
- CLOSED
- 5
- 14
updated Aug 21, 2019
Write a nix expression to enter a shell with specified build artifact

#16101 · created Dec 28, 2018 by Matthew Pickering 5 Pnormal Ttask Trac import newcomer
- CLOSED
- 1
updated Jul 07, 2019
forkProcess causes weird GC summary in the child process

#16102 · created Dec 28, 2018 by Ömer Sinan Ağacan 5 Pnormal RTS Tbug Trac import
- CLOSED
- 8
updated Sep 28, 2020
docs-haddock Hadrian target doesn't work reliably

#16103 · created Dec 28, 2018 by Alec Theriault 5 Pnormal Tbug Trac import hadrian
- CLOSED
- 4
updated Jul 07, 2019
Plugin name lookup behavior change from GHC 8.4 series

#16104 · created Dec 28, 2018 by Levent Erkök 8.6.4 5 Pnormal Tbug Trac import
- CLOSED
- 10
updated Jul 07, 2019
Haddock's resource directory isn't properly handled by Hadrian

#16105 · created Dec 28, 2018 by Alec Theriault 8.8.1 5 Pnormal Tbug Trac import hadrian
- CLOSED
- 2
updated Jul 07, 2019
Remove PowerPC OS X (Darwin) support

#16106 · created Dec 30, 2018 by Peter Trommler ⊥ 5 Pnormal Ttask Trac import
- CLOSED
- 17
updated Apr 06, 2022
Update GCC compiler & friends

#16107 · created Dec 30, 2018 by Philippe 8.10.1 5 Pnormal Tfeature request Trac import Windows packaging upstream
- CLOSED
- 1
- 4
updated Oct 22, 2019
cabal install H under Windows 10 does not terminate

#16109 · created Dec 30, 2018 by dsamperi 5 Pnormal Tbug Trac import runtime perf
- CLOSED
- 2
updated Jul 07, 2019
Explicit foralls in associated type family defaults are completely ignored?

#16110 · created Dec 30, 2018 by Ryan Scott 5 Pnormal Tbug Trac import
- CLOSED
- 4
- 41
updated May 05, 2020
Inconsistent behavior of Data.Bits.shiftL with different optimization levels and -fllvm

#16111 · created Dec 30, 2018 by Ryan Scott 8.8.1 5 Pnormal Tbug Trac import incorrect runtime result
- CLOSED
- 17
updated Aug 29, 2020
T11334b fails in the devel2 way

#16112 · created Dec 30, 2018 by Ben Gamari 8.10.1 7 Phigh Tbug Trac import
- CLOSED
- 3
updated Jul 07, 2019
T14740 fails in debugged compiler

#16113 · created Dec 30, 2018 by Ben Gamari 8.8.1 7 Phigh Tbug Trac import typechecker
- CLOSED
- 2
updated Jul 07, 2019
strange "instance .. => .. => .. where ..."

#16114 · created Dec 31, 2018 by waldmann@imn.htwk-leipzig.de 8.8.1 5 Pnormal Tbug Trac import
- CLOSED
- 7
updated Aug 06, 2019
Explicit foralls in associated type family equations are oblivious to class-bound variables

#16116 · created Dec 31, 2018 by Ryan Scott 8.8.1 5 Pnormal Tbug Trac import
- CLOSED
- 7
updated Apr 06, 2020
Random segfaults at runtime on macOS Mojave caused by GHC linker misaligning sections

#16117 · created Dec 31, 2018 by gwynne 8.8.1 5 Pnormal Tbug Trac import linking runtime crash
- CLOSED
- 1
updated Oct 28, 2019
Hadrian should use cabal build-tools installed Alex and Happy if necessary

#16120 · created Jan 02, 2019 by A. Sandberg Eriksson 8.8.1 5 Pnormal Tfeature request Trac import hadrian
- CLOSED
- 13
updated Jul 07, 2019
QuantifiedConstraints fails to deduce trivial constraint

#16123 · created Jan 03, 2019 by Erik Schnetter 5 Pnormal QuantifiedConstraints Tbug Trac import
- CLOSED
- 4
updated Jul 07, 2019
Broken Links in docs/users_guide/using-optimisation.rst

#16125 · created Jan 04, 2019 by Sven Tennie 3 Plow Tbug Trac import documentation
- CLOSED
- 2
updated Jul 07, 2019
Incorrect non-exhaustive pattern warning with PatternSynonyms

#16129 · created Jan 05, 2019 by Simon Jakobi 5 Pnormal Tbug Trac import error messages pattern match warnings
- CLOSED
- 2
updated Jul 07, 2019
-ddump-cmm doesn't work when compiling cmm files

#16131 · created Jan 05, 2019 by Ömer Sinan Ağacan 5 Pnormal Tbug Trac import
- CLOSED
- 2
updated Jul 07, 2019
./validate --slow: "dist-install/build/HSghc-prim-0.5.3.o: copyFile: does not exist (No such file or directory)"

#16132 · created Jan 05, 2019 by Simon Jakobi 5 Pnormal Tbug Trac import testsuite
- CLOSED
- 2
updated Oct 15, 2021