Issues · Glasgow Haskell Compiler / GHC

New issue

Have System.Timeout.timeout fail if exceptions are uninterruptibly masked

#18580 · opened Aug 15, 2020 by Facundo Domínguez core libraries feature request
- 1
- 19
updated Aug 18, 2020
Consider enabling `-ferror-spans` by default.

#18581 · opened Aug 16, 2020 by Dmitry Ivanov error messages feature request
- 1
updated Sep 30, 2020
User's guide: Include Index in left pane

#18629 · opened Aug 31, 2020 by Richard Eisenberg documentation feature request
- 0
updated Sep 01, 2020
Warning for partial solutions to HasField constraints

#18650 · opened Sep 04, 2020 by Adam Gundry OverloadedRecordFields error messages feature request records
- 9
updated Sep 18, 2020
Allow access to "unoptimised" Core binds in GHC Plugins

#18671 · opened Sep 09, 2020 by Alfredo Di Napoli feature request plugins
- 10
updated Sep 23, 2020
Suggest PatternSynonyms when appropriate

#18683 · opened Sep 12, 2020 by Adam Gundry Plow PatternSynonyms error messages feature request
- 1
updated Sep 14, 2020
RTS ghc-debug: support non-threaded runtime

#18690 · opened Sep 14, 2020 by David Eichmann feature request
- 2
updated Sep 18, 2020
Integrate a minimal lens library with GHC

#18693 · opened Sep 15, 2020 by Sebastian Graf feature request
- 1
- 10
updated Sep 28, 2020
Teach GHC about the evaluatedness of compacted things

#18709 · opened Sep 17, 2020 by David Feuer compact normal forms feature request runtime perf
- 0
updated Sep 17, 2020
More intelligent recompilation for Typed Template Haskell splices

#18711 · opened Sep 18, 2020 by Ben Gamari TemplateHaskell feature request recompilation checking
- 2
updated Sep 18, 2020
PmCheck: Inhabitation testing through set approximations

#18735 · opened Sep 22, 2020 by Sebastian Graf feature request pattern match warnings
- 1
updated Sep 30, 2020
Infer multiplicity of case expression

#18738 · opened Sep 23, 2020 by Arnaud Spiwack LinearTypes feature request typechecker
- 1
updated Mar 01, 2021
Infer multiplicity of let expression

#18739 · opened Sep 23, 2020 by Arnaud Spiwack LinearTypes feature request typechecker
- 6
updated Sep 28, 2020
Expose primop to atomically "clone" a thread stack

#18741 · opened Sep 23, 2020 by Sven Tennie feature request
- 1
- 18
updated Feb 22, 2021
Compact Region allocator creates unexpectedly small blocks

#18757 · opened Sep 28, 2020 by Fabian Thorand compact normal forms feature request
- 1
- 2
updated Oct 14, 2020
Configurable/overridable settings file

#18763 · opened Sep 29, 2020 by Mathieu Boespflug 8.10.3 feature request
- 1
updated Sep 30, 2020
Improve "No instance for HasField" error messages

#18776 · opened Sep 30, 2020 by Adam Gundry OverloadedRecordFields error messages feature request records
- 4
- 0
updated Dec 02, 2020
Programmatic Access to Profiling Data

#18778 · opened Sep 30, 2020 by Timothy Bess feature request profiling
- 10
updated Dec 08, 2020
primops for word64 xWithCarry operations

#18792 · opened Oct 02, 2020 by Carter Schonwald feature request numerics primops
- 0
updated Oct 05, 2020
WinIO improvement: Multiple workers

#18805 · opened Oct 05, 2020 by Ben Gamari Windows feature request winio
- 0
updated Oct 05, 2020
Include path to ghc-pkg in `ghc --info`

#18807 · opened Oct 05, 2020 by Ben Gamari feature request
- 1
- 1
updated Oct 06, 2020
Allow pragmas on field selectors.

#18811 · opened Oct 06, 2020 by Andreas Klebinger Research needed Plow feature request records
- 3
updated Oct 06, 2020
Hardian: make nofib rule more fine-grained 0 of 1 task completed

#18827 · opened Oct 10, 2020 by Alex D feature request hadrian nofib
- 0
updated Nov 09, 2020
Display accepted performance metrics

#18839 · opened Oct 13, 2020 by Sylvain Henry feature request testsuite
- 1
- 2
updated Oct 28, 2020
Add progress bar and interruptibility to loading up interpreted code

#18858 · opened Oct 17, 2020 by tysonzero GHCi feature request
- 1
updated Nov 09, 2020
Add option to disable SCC on a module when built for profiling

#18867 · opened Oct 20, 2020 by Douglas RAILLARD feature request profiling
- 1
updated Nov 08, 2020
Include field type in missing field error message

#18869 · opened Oct 20, 2020 by parsonsmatt Pnormal error messages feature request records
- 1
- 10
updated Jan 18, 2021
Deriving multiple classes in standalone (or document this limitation)

#18874 · opened Oct 22, 2020 by Julien Debon deriving feature request
- 1
- 1
updated Nov 08, 2020
Scoped Typed Holes

#18878 · opened Oct 22, 2020 by parsonsmatt feature request typed holes
- 2
updated Nov 09, 2020
Cmm output should exploit Unf=OtherCon []

#18879 · opened Oct 23, 2020 by AndrasKovacs feature request pointer tagging runtime perf
- 8
updated Oct 28, 2020
Enable -fwarn-incomplete-patterns by default

#18880 · opened Oct 23, 2020 by Hjulle Pnormal error messages feature request
- 2
- 3
updated Dec 09, 2020
-Winvalid-haddock should be part of -Wall

#18905 · opened Oct 29, 2020 by Oleg Grenrus error messages feature request
- 3
updated Nov 14, 2020
Allow extra variables in class declaration context (in restricted situations)

#18906 · opened Oct 29, 2020 by sheaf feature request
- 2
updated Nov 03, 2020
Testsuite using stage=1 compiler

#18924 · opened Nov 03, 2020 by Simon Peyton Jones feature request testsuite
- 0
updated Nov 03, 2020
New bit test and set primop?

#18935 · opened Nov 09, 2020 by vdukhovni feature request primops
- 1
- 3
updated Nov 10, 2020
Fold away or reduce `and# (extendWordN# x) mask`

#18943 · opened Nov 12, 2020 by Moritz Angermann feature request runtime perf
- 0
updated Nov 18, 2020
List fusion: Make traverse et al. good producers

#18949 · opened Nov 13, 2020 by Sebastian Graf core libraries feature request fusion
- 1
updated Nov 18, 2020
Extensible Interfaces Format

#18954 · opened Nov 16, 2020 by Josh Meredith feature request
- 3
updated Dec 16, 2020
Warn for strict where bindings attached to clause with multiple GRHSs

#18959 · opened Nov 17, 2020 by Sebastian Graf feature request
- 0
updated Dec 17, 2020
Data.List.drop should take part in list fusion

#18964 · opened Nov 17, 2020 by Sebastian Graf core libraries feature request fusion
- 0
updated Nov 18, 2020
[Template Haskell] Additional information in ModuleInfo

#18968 · opened Nov 18, 2020 by parsonsmatt TemplateHaskell feature request
- 1
updated Nov 18, 2020
MIPS64 LLVM backend

#18975 · opened Nov 22, 2020 by Sven Tennie LLVM backend feature request
- 0
updated Dec 20, 2020
Allow type-checking plugins to emit custom error messages

#18977 · opened Nov 23, 2020 by sheaf GHC API error messages feature request plugins
- 4
updated Dec 04, 2020
Allow users to define an error message that is displayed when a constraint can't be solved

#18978 · opened Nov 23, 2020 by sheaf custom type errors error messages feature request
- 1
- 2
updated Nov 26, 2020
Warnings about missing signatures (local, kind, instance)

#18992 · opened Nov 25, 2020 by Icelandjack error messages feature request
- 3
- 3
updated Dec 04, 2020
Add a quick build for windows in ci pipeline

#19006 · opened Nov 27, 2020 by Javier Neira CI Windows feature request
- 0
updated Dec 04, 2020
Warn when a function's type indicates that it's unnecessarily monadic

#19007 · opened Nov 28, 2020 by Joseph C. Sible error messages feature request
- 11
updated Dec 14, 2020
Missed optimization

#19011 · opened Nov 30, 2020 by Neo feature request runtime perf
- 2
updated Dec 05, 2020
Implement Constant folding for Int64/Word64 on 32-bit archs

#19024 · opened Dec 03, 2020 by Sylvain Henry feature request
- 0
updated Dec 04, 2020
Allow heap profiling to be controlled from within a program

#19032 · opened Dec 07, 2020 by Matthew Pickering feature request profiling
- 0
updated Jan 22, 2021
Intrusive unpacked sums

#19035 · opened Dec 08, 2020 by John Ericson feature request runtime perf
- 5
updated Dec 10, 2020
Functional dependencies (for classes or type familes alike) can not refine given equality constraints

#19043 · opened Dec 09, 2020 by John Ericson FunctionalDependencies feature request
- 4
updated Jan 19, 2021
Linking avoidance on Windows/OS X

#19061 · opened Dec 14, 2020 by Sylvain Henry Windows compiler perf feature request linking macOS
- 0
updated Dec 14, 2020
Building a stage3 compiler as a(n optional?) compiler perf test in CI

#19081 · opened Dec 17, 2020 by Sebastian Graf CI compiler perf feature request
- 2
updated Dec 20, 2020
compact regions: Add a hash-consing variant

#19095 · opened Dec 20, 2020 by Matthew Pickering compact normal forms feature request
- 1
- 0
updated Dec 20, 2020
GHC.Exts.build should be exported from a module marked {-# LANGUAGE Safe #-}

#19127 · opened Dec 27, 2020 by Oleg Grenrus Safe Haskell core libraries feature request primops
- 4
updated Feb 22, 2021
add "true group by" function in Data.List

#19135 · opened Dec 30, 2020 by Philippe feature request
- 8
updated Jan 02, 2021
HsExpr to Template Haskell

#19148 · opened Jan 01, 2021 by Guillaume Bouchard TemplateHaskell feature request
- 6
updated Jan 11, 2021
Optimization idea for case expression dispatch

#19153 · opened Jan 01, 2021 by Neo feature request runtime perf
- 37
updated Feb 02, 2021
Debug function to stop execution after x amount of times

#19157 · opened Jan 02, 2021 by Philippe GHCi debugger feature request
- 1
- 3
updated Jan 16, 2021
Optimization for binary masks

#19166 · opened Jan 04, 2021 by Sylvain Henry feature request simplifier
- 0
updated Jan 07, 2021
`mkDumpDoc` is not exported in GHC 9.0.1

#19172 · opened Jan 05, 2021 by Pranay Sashank GHC API feature request
- 2
updated Jan 06, 2021
Cross-compilers should be stage2 compilers 0 of 4 tasks completed

#19174 · opened Jan 05, 2021 by Sylvain Henry Pnormal cross-compilation feature request
- 1
updated Jan 07, 2021
Consider using mesh style allocator for pinned objects

#19175 · opened Jan 05, 2021 by Matthew Pickering RTS feature request
- 2
updated Feb 10, 2021
Linear search when compiling case expression on Integers

#19176 · opened Jan 05, 2021 by Neo feature request runtime perf
- 2
updated Feb 01, 2021
Do not recompile when changes are confined to comments and non-significant white space

#19184 · opened Jan 07, 2021 by David Fox feature request recompilation checking
- 1
updated Jan 30, 2021
Guards should accept linear variables

#19193 · opened Jan 08, 2021 by Arnaud Spiwack LinearTypes feature request
- 1
updated Feb 15, 2021
Optimisation idea: Hylomorphism inference

#19198 · opened Jan 09, 2021 by Sebastian Graf feature request
- 4
updated Jan 10, 2021
GHCi should automatically enable language extensions found in a module

#19207 · opened Jan 12, 2021 by Artyom Kazak GHCi feature request
- 3
- 3
updated Jan 30, 2021
Haddocks for pattern synonym fields

#19212 · opened Jan 13, 2021 by Sebastian Graf PatternSynonyms feature request haddock
- 0
updated Jan 13, 2021
Implicitly quantify variables in `:kind' command

#19217 · opened Jan 14, 2021 by Icelandjack GHCi feature request newcomer
- 1
- 1
updated Jan 30, 2021
Move AST into it's own package

#19218 · opened Jan 14, 2021 by John Ericson TTG feature request
- 1
- 0
updated Jan 14, 2021
Testrunner: Allocation report should display change even if it is to be accepted

#19219 · opened Jan 14, 2021 by Sebastian Graf feature request testsuite
- 0
updated Jan 30, 2021
Motivation for let/app invariant

#19223 · opened Jan 15, 2021 by Sebastian Graf core lint feature request float-out simplifier
- 6
updated Feb 12, 2021
Cheapness Worker/Wrapper to support eta expansion

#19230 · opened Jan 18, 2021 by Sebastian Graf Arity and eta expansion feature request
- 4
updated Jan 30, 2021
Support GHC2021

#19234 · opened Jan 18, 2021 by Joachim Breitner 9.2.1 feature request
- 2
- 1
- 22
updated Feb 16, 2021
Recursive type families optimisation

#19238 · opened Jan 19, 2021 by Sylvain Henry TypeFamilies compiler perf feature request
- 1
updated Feb 15, 2021
GHCi :doc command should render haddocks

#19254 · opened Jan 25, 2021 by Aaron Allen GHCi feature request haddock
- 5
- 8
updated Feb 06, 2021
Enumerate potential cases in an EmptyCase error message

#19271 · opened Jan 28, 2021 by parsonsmatt Pnormal feature request pattern match warnings
- 0
updated Jan 29, 2021
Implementing Passive Live Range Splitting in fregs-graph

#19274 · opened Jan 29, 2021 by Benjamin Maurer NCG backend Pnormal code generation feature request
- 4
updated Feb 27, 2021
Disabling worker/wrapper transformation per function

#19276 · opened Jan 29, 2021 by Sylvain Henry Pnormal feature request simplifier
- 7
updated Feb 16, 2021
Sections for associative operators: Parse `(x ++ y ++)` as `(\ z -> x ++ y ++ z)`

#19281 · opened Jan 30, 2021 by Andreas Abel feature request parser
- 1
- 3
updated Feb 28, 2021
Rewrite rules on functions on unboxed values are not supported

#19313 · opened Feb 03, 2021 by Richard Eisenberg feature request rules
- 1
- 7
updated Feb 16, 2021
Missing warning for a run-time pattern match failure

#19327 · opened Feb 05, 2021 by Hai / @BestYeen Pnormal error messages feature request pattern match warnings
- 1
- 1
updated Feb 21, 2021
Allow `case` in LHS of RULE

#19351 · opened Feb 11, 2021 by Sebastian Graf feature request rules
- 5
updated Feb 16, 2021
Operator sections and rebindable syntax

#19354 · opened Feb 12, 2021 by Simon Peyton Jones Pnormal RebindableSyntax feature request
- 1
updated Mar 01, 2021
Improve fragmentation diagnostics 0 of 3 tasks completed

#19357 · opened Feb 12, 2021 by Ben Gamari RTS feature request runtime perf
- 1
- 1
- 3
updated Mar 03, 2021
Template Haskell doesn't support Haskell 2010 default declarations

#19373 · opened Feb 14, 2021 by Mario TemplateHaskell feature request
- 2
updated Feb 16, 2021
Provide user more control about how much memory the RTS retains 0 of 3 tasks completed

#19381 · opened Feb 15, 2021 by Matthew Pickering RTS feature request runtime perf
- 0
updated Mar 03, 2021
Provide a `tryToGetQSem`

#19383 · opened Feb 15, 2021 by Gauthier S. concurrency core libraries feature request
- 1
- 7
updated Feb 21, 2021
Surprising lack of generalisation using MonoLocalBinds

#19396 · opened Feb 17, 2021 by Tom Ellis feature request typechecker
- 7
updated Feb 26, 2021
GNU make job server-alike for GHC --make

#19416 · opened Feb 22, 2021 by Adam Sandberg Eriksson compiler perf feature request
- 2
- 19
updated Mar 04, 2021
Support overriding "No instance" errors using the default deriving strategy

#19418 · opened Feb 22, 2021 by infinity0 deriving feature request
- 0
updated Mar 02, 2021
Use source file hashes as well as mtimes when determining whether a file needs to be recompiled

#19439 · opened Feb 25, 2021 by hdgarrood feature request recompilation checking
- 1
- 2
updated Mar 01, 2021
Make code generated by `dataToTag#` more compact (and efficient, hopefully)

#19444 · opened Feb 26, 2021 by Sebastian Graf feature request pointer tagging
- 7
updated Feb 26, 2021
Generate branchless code for two-alternative cases with default alternative if they return literals or nullary constructors.

#19448 · opened Feb 26, 2021 by Andreas Klebinger code generation feature request
- 1
- 2
updated Mar 02, 2021
memfd_create + mmap for anon allocations in RTS linker for a better debugging experience

#19451 · opened Feb 26, 2021 by Adam Sandberg Eriksson RTS feature request linking
- 0
updated Feb 26, 2021
Pseudo-SSA in NCG

#19453 · opened Feb 27, 2021 by Benjamin Maurer 9.4.1 NCG backend Pnormal code generation feature request
- 4
updated Mar 03, 2021
Don't allow deriving-via when the via type is identical to the type intsances are being derived for

#19465 · opened Mar 01, 2021 by Ollie Charles DerivingVia feature request
- 2
- 2
updated Mar 01, 2021
Provide a way to set the nursery size independently from the number of capabilities

#19483 · opened Mar 03, 2021 by Pepe Iborra RTS feature request
- 0
updated Mar 03, 2021