Issues · Glasgow Haskell Compiler / GHC

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Compilation results are not deterministic

#4012 · opened Apr 24, 2010 by kili 9.2.1 7 Phigh Trac import bug determinism
- 1
- 150
updated Jan 23, 2021
Deriving Generic of a big type takes a long time and lots of space

#5642 · opened Nov 17, 2011 by basvandijk 9.2.1 5 Phigh Trac import bug compiler perf deriving
- 59
updated Jan 30, 2021
Give more detailed information about PINNED data in a heap profile

#7275 · opened Sep 28, 2012 by edsko@edsko.net 9.2.1 5 Pnormal Trac import feature request newcomer profiling
- 2
- 19
updated Feb 12, 2021
Add more bit fiddling functions to 'integer-gmp'

#7860 · opened Apr 23, 2013 by lebedev 9.2.1 5 Pnormal Trac import core libraries feature request ghc-bignum integer-gmp
- 23
updated Sep 24, 2020
switch -msse2 to be on by default

#8949 · opened Apr 02, 2014 by errge 9.2.1 7 Phigh Trac import bug code generation
- 21
updated Jan 23, 2021
unfolding info as seen when building a module depends on flags in a previously-compiled module

#9370 · opened Jul 27, 2014 by Carter Schonwald 9.2.1 7 Phigh Trac import bug compiler perf
- 1
- 52
updated Jan 23, 2021
Entered absent arg in a Repa program

#11126 · opened Nov 23, 2015 by tuplanolla 9.2.1 7 Phigh Trac import bug demand analysis incorrect runtime result
- 20
updated Jan 23, 2021
Implement DWARF debugging on powerpc64 0 of 5 tasks completed

#11261 · opened Dec 19, 2015 by Peter Trommler 9.2.1 5 Pnormal PowerPC Trac import bug code generation debug information incorrect runtime result
- 2
- 12
updated Jan 23, 2021
Export Word32#, Word64# on all architectures

#11953 · opened Apr 19, 2016 by Ben Gamari 9.2.1 5 Pnormal Trac import bug feature request
- 2
- 22
updated Feb 19, 2021
Type/data family instances in kind checking

#12088 · opened May 19, 2016 by alexvieth 9.2.1 7 CUSKs Phigh Trac import bug feature request typechecker
- 1
- 55
updated Jan 25, 2021
typePrimRep panic while compiling GHC with profiling

#13233 · opened Feb 05, 2017 by Ben Gamari 9.2.1 7 Phigh Trac import bug compiler crash
- 42
updated Jan 23, 2021
vector test suite uses excessive memory on GHC 8.2

#13535 · opened Apr 06, 2017 by Ryan Scott 9.2.1 10 Phighest SpecConstr Trac import bug compiler perf
- 74
updated Jan 23, 2021
Performance regression (~34%) in 8.2.1, poor register allocation(?) in an inner loop over an array

#13763 · opened May 28, 2017 by jberryman 9.2.1 7 NCG backend Phigh Trac import bug join points runtime perf
- 20
updated Jan 23, 2021
Ship check-ppr in bindist and compile during testsuite run

#13897 · opened Jun 29, 2017 by Ben Gamari 9.2.1 7 Phigh Trac import newcomer task upstream
- 8
updated Jan 23, 2021
Bad monads performance

#14013 · opened Jul 22, 2017 by danilo2 9.2.1 7 Phigh Trac import bug
- 17
updated Jan 23, 2021
Common Block Elimination pass doesn't eliminate common blocks

#14226 · opened Sep 13, 2017 by Ben Gamari 9.2.1 7 Phigh Trac import bug code generation runtime perf
- 31
updated Jan 23, 2021
GHC HEAD's ghc-stage1 panics on Data.Typeable.Internal

#14270 · opened Sep 22, 2017 by Herbert Valerio Riedel 9.2.1 7 Phigh Trac import Typeable bug compiler crash
- 23
updated Jan 23, 2021
GHCi fails to garbage collect declaration `l = length [1..10^8]` entered at prompt

#14789 · opened Feb 10, 2018 by KevinBuhr 9.2.1 5 GHCi Pnormal Trac import bug runtime perf
- 3
updated Jan 23, 2021
The well-kinded type invariant (in TcType)

#14873 · opened Mar 01, 2018 by Ryan Scott 9.2.1 10 Phighest Trac import TypeInType bug compiler crash typechecker
- 12
updated Jan 23, 2021
2-fold memory usage regression GHC 8.2.2 -> GHC 8.4.1 compiling `mmark` package

#14974 · opened Mar 26, 2018 by Herbert Valerio Riedel 9.2.1 7 Phigh Trac import bug compiler perf
- 12
updated Mar 02, 2021
Runtime performance regression with binary operations on vectors

#14980 · opened Mar 27, 2018 by ttylec 9.2.1 7 Phigh Trac import bug runtime perf
- 34
updated Jan 23, 2021
Fix performance regressions from #14737

#15019 · opened Apr 09, 2018 by Tobias Dammers 9.2.1 7 Phigh Trac import bug compiler perf
- 26
updated Jan 23, 2021
Extend TVar/MVar to N capacity / Add primitive channel type

#15267 · opened Jun 13, 2018 by winter 9.2.1 7 Phigh RTS Trac import feature request
- 4
updated Jan 23, 2021
no way to talk about unpacking sum types / unpacking tuples

#15358 · opened Jul 10, 2018 by chessai 9.2.1 5 Pnormal Trac import UnboxedSums UnboxedTuples feature request
- 3
updated Jan 23, 2021
Replace the atomicModifyMutVar# primop

#15364 · opened Jul 11, 2018 by David Feuer 9.2.1 5 Pnormal RTS Trac import feature request ghc proposal
- 3
updated Jan 23, 2021
GHC.Exts.Heap.getClosureData doesn't return the payload for AP_STACK

#15375 · opened Jul 13, 2018 by Simon Marlow 9.2.1 3 Plow RTS Trac import bug
- 4
updated Jan 23, 2021
GHC determine illegal kind for standalone deriving with Deriving via

#15376 · opened Jul 14, 2018 by mizunashi_mana 9.2.1 5 Pnormal Trac import bug deriving
- 6
updated Jan 23, 2021
Use TcLevels to decide about floating out of implications

#15378 · opened Jul 14, 2018 by Richard Eisenberg 9.2.1 5 Pnormal Trac import task
- 2
updated Jan 25, 2021
heapprof001 segfaults in prof_hc_hb way on i386

#15382 · opened Jul 15, 2018 by Ben Gamari 9.2.1 5 CI breakage Pnormal Trac import bug
- 9
updated Jan 23, 2021
Every implication should bump the TcLevel exactly once

#15384 · opened Jul 15, 2018 by Richard Eisenberg 9.2.1 5 Pnormal Trac import task
- 10
updated Jan 23, 2021
-Wall-missed-specialisations warnings not fatal with -Werror

#15389 · opened Jul 15, 2018 by ChaiTRex 9.2.1 5 Pnormal Trac import bug
- 4
updated Jan 23, 2021
Maybe ghc-pkg register should unregister packages with "incompatible" signatures

#15391 · opened Jul 16, 2018 by Edward Z. Yang 9.2.1 5 Pnormal Trac import backpack bug ghc-pkg
- 2
updated Jan 23, 2021
Inconsistency in parsing trailing commas inside import section

#15392 · opened Jul 16, 2018 by Dmitrii Kovanikov 9.2.1 5 Pnormal Trac import feature request parser
- 4
updated Jan 23, 2021
GHC doesn't come with dynamic object files/libraries compiled with profiling

#15394 · opened Jul 16, 2018 by mrkkrp 9.2.1 5 Pnormal Trac import feature request
- 4
updated Jan 23, 2021
Make StaticPtr (more) robust to code changes and recompilation

#15395 · opened Jul 16, 2018 by richardw 9.2.1 5 Pnormal StaticPointers Trac import feature request
- 2
updated Jan 23, 2021
The settings and behaviour of idle GC are very confusing

#15402 · opened Jul 16, 2018 by Niklas Hambüchen 9.2.1 5 Pnormal RTS Trac import bug newcomer
- 2
updated Jan 23, 2021
Quantified constraints half-work with equality constraints

#15409 · opened Jul 17, 2018 by AntC 9.2.1 5 Pnormal QuantifiedConstraints Trac import bug
- 3
updated Jan 23, 2021
Why both gen and gen_no in bdescr?

#15414 · opened Jul 18, 2018 by Ben Gamari 9.2.1 5 Pnormal RTS Trac import task
- 6
updated Jan 23, 2021
Higher rank types in pattern synonyms

#15416 · opened Jul 19, 2018 by mniip 9.2.1 5 Pnormal PatternSynonyms Trac import bug typechecker
- 4
updated Jan 23, 2021
Performance drop 60 times on non-profiling binary

#15418 · opened Jul 19, 2018 by Håkan Thörngren 9.2.1 7 RTS Trac import bug info needed
- 21
updated Jan 23, 2021
executable with library and template haskell doesn't compile statically

#15420 · opened Jul 20, 2018 by tiny 9.2.1 5 Pnormal Trac import bug
- 3
updated Jan 23, 2021
There should be a flag for GHCi that tells it to load as many modules as possible

#15424 · opened Jul 20, 2018 by mrkkrp 9.2.1 5 GHCi Pnormal Trac import feature request
- 3
updated Jan 23, 2021
GHC does not warn when two conflicting packages with same name are given via a dependent package and -package-db

#15425 · opened Jul 20, 2018 by Niklas Hambüchen 9.2.1 5 Pnormal Trac import bug
- 3
updated Jan 23, 2021
The docs for Unsafe.Coerce should recommend using Data.Coerce instead

#15429 · opened Jul 21, 2018 by Simon Jakobi 9.2.1 5 Pnormal Trac import core libraries task
- 1
updated Jan 23, 2021
Internal error with PartialTypeSignatures and TH

#15433 · opened Jul 23, 2018 by Krzysztof Gogolewski 9.2.1 5 Pnormal Trac import bug partial type sigs
- 4
updated Jan 23, 2021
DerivingVia (and perhaps even GND) works badly with DeriveGeneric

#15434 · opened Jul 24, 2018 by Hiromi Ishii 9.2.1 5 Pnormal Trac import bug deriving
- 6
updated Jan 23, 2021
Make nofib-style anaysis for perf/compiler

#15435 · opened Jul 24, 2018 by Simon Peyton Jones 9.2.1 5 Pnormal Trac import bug
- 2
updated Jan 22, 2021
Allow execution of stage2 compiler to happen later

#15448 · opened Jul 27, 2018 by Ben Gamari 9.2.1 5 Pnormal Trac import feature request
- 3
updated Jan 22, 2021
[GHCi] Add an option to make tab completion case-insensitive

#15452 · opened Jul 28, 2018 by f-a 9.2.1 3 GHCi Plow Trac import feature request
- 3
updated Jan 22, 2021
Memory usage when compiling jsaddle-dom exploded in 8.4.3

#15455 · opened Jul 28, 2018 by eskimor 9.2.1 7 Phigh Trac import bug compiler perf
- 25
updated Mar 01, 2021
Wredundant-constraints does not work when constraint synonym is used

#15459 · opened Jul 30, 2018 by Philippe 9.2.1 5 Pnormal Trac import bug
- 4
updated Jan 22, 2021
Machine accessible interface to GHCi

#15461 · opened Jul 31, 2018 by Ben Gamari 9.2.1 5 GHCi Pnormal Trac import feature request newcomer
- 14
updated Jan 22, 2021
fixST for lazy ST is a bit wrong

#15462 · opened Jul 31, 2018 by David Feuer 9.2.1 5 Pnormal Trac import bug core libraries incorrect runtime result
- 1
updated Jan 22, 2021
Template Haskell creates System names when it shouldn't

#15464 · opened Aug 01, 2018 by Richard Eisenberg 9.2.1 5 Pnormal TemplateHaskell Trac import bug
- 2
updated Jan 22, 2021
add -Wname-shadowing and -Wunused-pattern-binds to the default warnings for ghci

#15468 · opened Aug 02, 2018 by george.colpitts 9.2.1 5 GHCi Pnormal Trac import bug error messages feature request
- 5
updated Jan 22, 2021
Record projections with ambiguous types

#15470 · opened Aug 02, 2018 by sweirich@cis.upenn.edu 9.2.1 5 Pnormal Trac import feature request
- 5
updated Jan 22, 2021
Can't build `prof`-flavour with `-fauto-all`

#15477 · opened Aug 05, 2018 by Moritz Angermann 9.2.1 5 Pnormal Trac import bug
- 3
updated Jan 22, 2021
ghc -M requires -dep-suffix for no good reason

#15483 · opened Aug 06, 2018 by Artem Pelenitsyn 9.2.1 5 Pnormal Trac import driver feature request newcomer
- 2
updated Jan 22, 2021
GHC takes up huge amount of memory when compiling accelerate 1.2.0

#15488 · opened Aug 08, 2018 by noah 9.2.1 7 Phigh Trac import bug compiler perf
- 28
updated Jan 22, 2021
interpreter: sequence_ (replicate 100000000 (return ())) gobbles up memory

#15503 · opened Aug 10, 2018 by Bertram Felgenhauer 9.2.1 7 GHCi Phigh Trac import bug runtime perf
- 18
updated Jan 22, 2021
Qualified Holes

#15510 · opened Aug 12, 2018 by Andrew Martin 9.2.1 3 Plow Trac import feature request
- 5
updated Jan 22, 2021
Performance regression when using the GHC API to evaluate code compared to 8.4

#15524 · opened Aug 15, 2018 by Vaibhav Sagar 9.2.1 7 Phigh Trac import bug runtime perf upstream
- 36
updated Jan 22, 2021
Allow associated types in Minimal pragmas

#15534 · opened Aug 17, 2018 by David Feuer 9.2.1 5 Pnormal Trac import feature request
- 3
updated Jan 22, 2021
Unify unlifted pointer equality primitives

#15536 · opened Aug 17, 2018 by David Feuer 9.2.1 5 Pnormal Trac import feature request
- 3
updated Jan 22, 2021
Full laziness destroys opportunities for join points

#15560 · opened Aug 23, 2018 by Andreas Klebinger 9.2.1 5 Pnormal Trac import bug code generation join points
- 24
updated Jan 22, 2021
When a type application cannot be applied to an identifier due to the absence of an explicit type signature, let the error just say so!

#15596 · opened Sep 03, 2018 by kindaro 9.2.1 5 Pnormal Trac import TypeApplications error messages feature request typechecker
- 3
updated Jan 25, 2021
Error message involving type families points to wrong location

#15621 · opened Sep 08, 2018 by Ryan Scott 9.2.1 5 Pnormal Trac import TypeFamilies bug error messages typechecker
- 11
updated Jan 25, 2021
Improve the worst case performance of weak pointers

#15642 · opened Sep 14, 2018 by David Feuer 9.2.1 5 Pnormal RTS Trac import feature request runtime perf
- 12
updated Jan 22, 2021
Test Suite Unexpected failure for ghci062(ghci-ext)

#15644 · opened Sep 14, 2018 by Julian Leviston 9.2.1 5 Pnormal Trac import bug remote GHCi testsuite
- 2
updated Jan 25, 2021
ghci takes super long time to find the type of large fractional number

#15646 · opened Sep 14, 2018 by Johannkokos 9.2.1 5 GHCi Pnormal Trac import bug compiler perf newcomer
- 92
updated Feb 27, 2021
Check if some auto apply code is dead and remove if appropriate.

#15651 · opened Sep 17, 2018 by Andreas Klebinger 9.2.1 5 Pnormal RTS Trac import newcomer task
- 3
updated Jan 22, 2021
Valid hole fits and GADT type variable names

#15677 · opened Sep 26, 2018 by Ryan Scott 9.2.1 5 GADTs Pnormal Trac import bug error messages typed holes valid hole fits
- 5
updated Jan 25, 2021
Provide the provenance of unification variables in error messages when possible

#15678 · opened Sep 26, 2018 by Ryan Scott 9.2.1 5 Pnormal Trac import bug error messages typechecker
- 2
updated Jan 25, 2021
Take exhaustiveness checking into consideration when using MonadFailDesugaring

#15681 · opened Sep 27, 2018 by Dmitrii Kovanikov 9.2.1 5 Pnormal Trac import bug
- 19
updated Jan 25, 2021
Add Eq1/Ord1/Read1/Show1 instances to newtypes in Data.Semigroup

#15690 · opened Sep 29, 2018 by Bodigrim 9.2.1 5 Pnormal Trac import core libraries feature request
- 2
updated Jan 25, 2021
Significant compilation time blowup when refactoring singletons-heavy code

#15703 · opened Oct 04, 2018 by Ryan Scott 9.2.1 7 Phigh Trac import bug compiler perf
- 1
- 27
updated Jan 25, 2021
Performance regression in for_ alternatives from GHC 8.2.2 to newer GHCs

#15717 · opened Oct 07, 2018 by Niklas Hambüchen 9.2.1 5 Pnormal Trac import bug runtime perf simplifier
- 7
updated Jan 25, 2021
Hadrian appears to link against libffi unconditionally

#16022 · opened Dec 09, 2018 by Ben Gamari 9.2.1 10 Phighest Trac import bug hadrian
- 7
updated Jan 25, 2021
ffi018_ghci fails when unregisterised

#16085 · opened Dec 22, 2018 by Ben Gamari 9.2.1 7 CI breakage Phigh Trac import bug
- 7
updated Jan 22, 2021
LLVM Backend generates invalid assembly.

#16354 · opened Feb 22, 2019 by Andreas Klebinger 9.2.1 7 LLVM backend Phighest Trac import Windows bug code generation
- 1
- 20
updated Jan 22, 2021
Stabilize AArch64 support 2 of 4 tasks completed

#16796 · opened Jun 11, 2019 by Ben Gamari 9.2.1 ARM task
- 4
updated Jan 12, 2021
Selectively reduce optimisation level in GHC build

#16817 · opened Jun 13, 2019 by Ben Gamari 9.2.1 compiler perf task
- 1
- 2
updated Jan 22, 2021
runghc HelloWorld.hs is quite slow

#16822 · opened Jun 14, 2019 by Ben Gamari 9.2.1 bug compiler perf
- 22
updated Jan 22, 2021
Clean up TrivColorable

#16880 · opened Jun 27, 2019 by Ben Gamari 9.2.1 NCG backend task
- 0
updated Jan 22, 2021
Remove SPARC NCG backend?

#16882 · opened Jun 27, 2019 by Ben Gamari 9.2.1 NCG backend task
- 2
- 6
updated Jan 22, 2021
Package imports can cause linker errors

#16935 · opened Jul 12, 2019 by Arian van Putten 9.2.1 Phigh linking recompilation checking
- 3
updated Jan 22, 2021
Refactor Ct and friends

#16947 · opened Jul 16, 2019 by Richard Eisenberg 9.2.1 Pnormal task typechecker
- 0
updated Jan 22, 2021
Something is fishy with byte arrays on big endian systems

#16998 · opened Jul 27, 2019 by Ben Gamari 9.2.1 Phigh ghc build failure
- 11
updated Jan 23, 2021
"unable to commit memory" is rarely a compiler bug, update the error message

#17039 · opened Aug 08, 2019 by Ömer Sinan Ağacan 9.2.1 Pnormal RTS error messages task
- 1
- 0
updated Jan 22, 2021
GHC 8.6.5 is quite a bit larger on aarch64 than x86

#17051 · opened Aug 10, 2019 by Graham Christensen 9.2.1 ARM Pnormal bug packaging
- 8
updated Jan 22, 2021
Optimize dataToTag# for small constructor families.

#17079 · opened Aug 19, 2019 by Andreas Klebinger 9.2.1 code generation feature request pointer tagging runtime perf
- 1
- 1
updated Jan 23, 2021
Document how to write a pattern synonym that uses a view pattern

#17098 · opened Aug 21, 2019 by Simon Jakobi 9.2.1 PatternSynonyms ViewPatterns documentation newcomer task
- 0
updated Jan 22, 2021
Link rts symbols weakly

#17157 · opened Sep 06, 2019 by Jens Petersen 9.2.1 RTS feature request linking
- 2
updated Jan 22, 2021
8.8.1 regression: Combining -prof and -optP-traditional breaks

#17185 · opened Sep 12, 2019 by Ryan Scott 9.2.1 10 Phighest cpp profiling
- 13
updated Jan 29, 2021
Migrate GHC utility parsing functions from ghc-exactprint to GHC API

#17229 · opened Sep 21, 2019 by Alan Zimmerman 9.2.1 GHC API Pnormal feature request parser
- 1
- 2
updated Jan 22, 2021
Logging of "heap allocated" events is racy

#17271 · opened Sep 28, 2019 by Ben Gamari 9.2.1 Phigh RTS bug
- 0
updated Jan 22, 2021
updateNurseryStats is racy

#17272 · opened Sep 28, 2019 by Ben Gamari 9.2.1 RTS bug
- 0
updated Jan 22, 2021
Warning about redundant bang patterns

#17340 · opened Oct 10, 2019 by Lemming 9.2.1 BangPatterns Pnormal error messages feature request newcomer
- 24
updated Sep 24, 2020
ghc-pkg on 8.8.1 with cabal 3.0 does not list user installed packages

#17341 · opened Oct 11, 2019 by george.colpitts 9.2.1 feature request ghc-pkg
- 1
- 17
updated Nov 08, 2020
Large bump in T13701 metrics on x86_64-deb9-dwarf

#17436 · opened Nov 05, 2019 by Alp Mestanogullari 9.2.1 compiler perf perf tests task
- 1
updated Jan 22, 2021