Issues · Glasgow Haskell Compiler / GHC

New issue

Implement minimumOn, maximumOn to mirror sortOn

#15566 · opened Aug 25, 2018 by Gabriel Garcia Research needed 5 Pnormal Trac import core libraries feature request
- 6
updated Jul 07, 2019
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 9.0.1 5 Pnormal Trac import TypeApplications error messages feature request typechecker
- 3
updated Jan 23, 2020
GHCi command, tracing steps of instance resolution for Constraint or expression

#15613 · opened Sep 06, 2018 by Icelandjack 0 GHCi Plow Trac import feature request
- 1
- 12
updated Oct 01, 2019
Add "difficulty" field to tickets

#15640 · opened Sep 13, 2018 by Philippe 5 Pnormal Trac import feature request infrastructure
- 3
updated Jul 07, 2019
Improve the worst case performance of weak pointers

#15642 · opened Sep 14, 2018 by David Feuer 9.0.1 5 Pnormal RTS Trac import feature request runtime perf
- 12
updated Jan 23, 2020
Add (or document if already exist) ability to derive custom typeclasses via source plugins

#15650 · opened Sep 17, 2018 by Dmitrii Kovanikov 8.6.1 5 Pnormal Trac import deriving feature request plugins
- 1
- 10
updated Jul 19, 2019
Support promotion of pattern synonyms to kinds

#15657 · opened Sep 19, 2018 by infinity0 8.6.1 5 Pnormal Trac import feature request
- 1
updated Jul 07, 2019
Break up the stable pointer table

#15665 · opened Sep 22, 2018 by David Feuer 8.6.1 5 Pnormal Trac import feature request
- 12
updated Jul 07, 2019
GADT's displayed type is misleading

#15674 · opened Sep 25, 2018 by AntC 8.6.1 5 Pnormal Trac import error messages feature request
- 8
updated Jul 07, 2019
Type synonym unused binds no warning?

#15687 · opened Sep 29, 2018 by AntC 8.6.1 5 Pnormal Trac import feature request parser
- 4
updated Jul 07, 2019
Add Eq1/Ord1/Read1/Show1 instances to newtypes in Data.Semigroup

#15690 · opened Sep 29, 2018 by Bodigrim 9.0.1 5 Pnormal Trac import core libraries feature request
- 1
updated Jan 23, 2020
More liberally kinded coercions for newtypes

#15707 · opened Oct 05, 2018 by mniip 8.6.1 5 Pnormal Trac import feature request roles typechecker
- 5
updated Jul 07, 2019
Primitive atomic logical operations

#15719 · opened Oct 08, 2018 by David Feuer 5 Pnormal Trac import feature request
- 2
updated Jan 23, 2020
Don't include Haskeline (and others) in the global package DB

#15726 · opened Oct 09, 2018 by judah 5 Pnormal Trac import feature request
- 5
updated Jul 07, 2019
Add sortOn/coerce rule

#15731 · opened Oct 09, 2018 by David Feuer 5 Pnormal Trac import core libraries feature request runtime perf
- 3
updated Jan 23, 2020
Implement sconcat Semigroup Instances for Tuples

#15737 · opened Oct 10, 2018 by Andrew Martin 5 Pnormal Trac import feature request
- 1
updated Jul 07, 2019
Accept GHCRTS=-N1 when not compiled with -threaded

#15741 · opened Oct 11, 2018 by lspitzner 5 Pnormal RTS Trac import feature request
- 1
updated Jul 07, 2019
Panicking typechecker plugins

#15745 · opened Oct 13, 2018 by Phil de Joux 5 Pnormal Trac import compiler crash feature request plugins typechecker plugins
- 1
- 2
updated Jul 07, 2019
ghci command: report function's inferred visible type applications

#15762 · opened Oct 17, 2018 by Icelandjack 5 GHCi Pnormal Trac import feature request
- 3
updated Jul 07, 2019
Visible type/kind applications in declaration of data/type constructors

#15782 · opened Oct 19, 2018 by Icelandjack 5 Pnormal Trac import TypeApplications feature request
- 5
updated Dec 07, 2020
Improve/complete the GHCi :doc command

#15785 · opened Oct 20, 2018 by Simon Jakobi 5 GHCi Pnormal Trac import feature request
- 6
updated Sep 26, 2019
Hi Haddock: Enable haddock to generate docs from .hi-files

#15786 · opened Oct 20, 2018 by Simon Jakobi 5 Pnormal Trac import documentation feature request haddock
- 2
updated Jan 23, 2020
Orphan Instance Overlap Error Message

#15814 · opened Oct 27, 2018 by parsonsmatt 5 Pnormal Trac import feature request newcomer
- 5
updated Jul 07, 2019
Exponentiation needs PrelRules

#15842 · opened Nov 01, 2018 by David Feuer 5 Pnormal Trac import feature request newcomer runtime perf
- 8
updated Jan 23, 2020
coercion errors don't always mention that data constructors are not in scope

#15850 · opened Nov 02, 2018 by gelisam 5 Pnormal Trac import error messages feature request
- 0
updated Jul 07, 2019
Error message: "accepting non-standard pattern guards" when there are no actual patterns

#15851 · opened Nov 02, 2018 by cdsmith@twu.net 5 Pnormal Trac import feature request
- 0
updated Jul 07, 2019
Warn about incomplete NamedFieldPuns patterns

#15855 · opened Nov 03, 2018 by Artyom.Kazak 5 Pnormal Trac import feature request
- 3
updated Jul 07, 2019
Standard deriving should be less conservative when `UndecidableInstances` is enabled

#15868 · opened Nov 07, 2018 by edsko@edsko.net 5 Pnormal Trac import deriving feature request
- 6
updated Jul 22, 2019
Function versioning instead of compilation flags...

#15876 · opened Nov 08, 2018 by MichalGajda 8.6.3 5 Pnormal SIMD Trac import feature request linking
- 2
updated Jul 07, 2019
:load in ghci should expose the entire namespace of a module

#15882 · opened Nov 09, 2018 by EyalLotem 8.6.3 5 GHCi Pnormal Trac import feature request
- 3
updated Jul 07, 2019
Provide a way for hadrian users to always pass some options to hadrian itself

#15890 · opened Nov 13, 2018 by Alp Mestanogullari 5 Pnormal Trac import feature request hadrian
- 11
updated Jan 23, 2020
If a type signature is too long to read left-to-right then let it read top-to-bottom.

#15959 · opened Nov 27, 2018 by Phil de Joux 8.6.3 5 Pnormal Trac import feature request
- 4
updated Jun 20, 2020
readv and pread support

#15965 · opened Nov 28, 2018 by Ben Gamari 5 Pnormal Trac import core libraries feature request
- 1
updated Jan 23, 2020
Built-in support for half-floats

#15983 · opened Dec 01, 2018 by Levent Erkök 8.6.3 5 Pnormal Trac import feature request
- 4
updated Jul 07, 2019
Bitwise-oriented semigroup and monoid newtype wrappers for Data.Bits.Bits instances

#15993 · opened Dec 04, 2018 by koz_ 9.2.1 5 Pnormal Trac import core libraries feature request
- 1
- 35
updated Jan 16, 2021
Add Unlifted List type to base

#15996 · opened Dec 05, 2018 by chessai 8.6.3 5 Pnormal Trac import core libraries feature request
- 3
updated Jul 07, 2019
EventManager could benefit from Data.Primitive.UnliftedArray

#15997 · opened Dec 05, 2018 by chessai 8.6.3 5 Pnormal Trac import core libraries feature request
- 1
updated Jul 07, 2019
GHC.Event.Thread.eventManager has a lot of indirections

#15998 · opened Dec 05, 2018 by chessai 8.6.3 5 Pnormal Trac import core libraries feature request
- 2
updated Jul 07, 2019
Implement `-Os`

#16007 · opened Dec 07, 2018 by Sebastian Graf ⊥ 5 Pnormal Trac import feature request task
- 6
updated Jul 07, 2019
Deprecate `optional` from Text.ParserCombinators.ReadP

#16009 · opened Dec 07, 2018 by dbaynard 5 Pnormal Trac import core libraries feature request
- 4
updated Jan 23, 2020
Cannot use DefaultSignatures for TypeFamiles

#16027 · opened Dec 10, 2018 by John Ericson 8.6.3 5 Pnormal Trac import feature request
- 3
updated Jul 07, 2019
expDouble## 0.0## doesn't get complied into 1.0##

#16036 · opened Dec 12, 2018 by Mateusz Kowalczyk 5 Pnormal Trac import feature request
- 4
updated Jul 07, 2019
Add a warning flag that warns when a datatype could be a newtype

#16049 · opened Dec 14, 2018 by chessai 5 Pnormal Trac import feature request
- 2
updated Jan 23, 2020
Instance resolution error message unclear, because of missing kind information

#16050 · opened Dec 14, 2018 by chessai 5 Pnormal Trac import feature request
- 7
updated Jul 07, 2019
expose st_blksize field from fstat syscall

#16099 · opened Dec 27, 2018 by Philippe 3 Plow Trac import external-unix feature request
- 0
updated Jul 07, 2019
GHC --version doesn't show arch

#16108 · opened Dec 30, 2018 by Philippe 3 Plow Trac import feature request
- 1
updated Jul 07, 2019
Hide the gnarly levity polymorphism stuff in the signatures of `undefined`, `throw`, etc

#16119 · opened Jan 02, 2019 by jberryman 5 Pnormal Trac import core libraries feature request
- 2
updated Jul 07, 2019
Pattern match checker should shortcut on simple cases

#16128 · opened Jan 04, 2019 by gershomb 5 Pnormal Trac import feature request
- 1
updated Jul 07, 2019
GHC for NetBSD

#16149 · opened Jan 08, 2019 by gh1 5 Pnormal Trac import feature request
- 1
updated Jul 07, 2019
Pattern Synonym for Ratio

#16155 · opened Jan 09, 2019 by Zemyla 5 Pnormal PatternSynonyms Trac import core libraries feature request
- 1
updated Jul 07, 2019
Don’t throw an error (by default) for use of DEPRECATED symbols under -Werror

#16163 · opened Jan 09, 2019 by Matt Renaud 5 Pnormal Trac import feature request
- 6
updated Jul 07, 2019
Move `Data.Profunctor` from `profunctors` package to `base`

#16173 · opened Jan 13, 2019 by Dmitrii Kovanikov 5 Pnormal QuantifiedConstraints Trac import core libraries feature request
- 5
- 17
updated Jul 09, 2020
Let-insertion for template haskell

#16176 · opened Jan 14, 2019 by Matthew Pickering 5 Pnormal TemplateHaskell Trac import feature request typed TemplateHaskell
- 5
updated Jul 07, 2019
Brackets and splices should be overloaded like the static keyword

#16178 · opened Jan 14, 2019 by Matthew Pickering 5 Pnormal TemplateHaskell Trac import feature request typed TemplateHaskell
- 3
updated Jul 07, 2019
ParsedSource (especially module name source span) not available from Source Plugin

#16189 · opened Jan 16, 2019 by literon 3 GHC API Plow Trac import feature request
- 1
updated Jan 23, 2020
readHexRational missing from Numeric

#16216 · opened Jan 22, 2019 by Merijn Verstraaten 5 Pnormal Trac import core libraries feature request
- 1
- 7
updated Jul 10, 2020
-Wmissing-signatures should warn when top-level signature is partial

#16220 · opened Jan 23, 2019 by Arnaud Spiwack 5 Pnormal Trac import feature request
- 5
updated Nov 21, 2019
Add setField to HasField

#16232 · opened Jan 24, 2019 by Adam Gundry 5 OverloadedRecordFields Pnormal Trac import feature request ghc proposal records typechecker
- 5
updated Nov 06, 2020
Run check-api-annotations and check-ppr on all parseable test code

#16237 · opened Jan 25, 2019 by Alan Zimmerman 5 Pnormal Trac import feature request testsuite
- 0
updated Jul 07, 2019
Core visible conditional compilation/static definition/code selection based upon static key values

#16240 · opened Jan 25, 2019 by Carter Schonwald 5 Pnormal Trac import feature request
- 9
updated Jul 07, 2019
Allow definition of functions with absurd contexts

#16266 · opened Feb 01, 2019 by So8res 3 Plow Trac import feature request
- 3
updated Nov 06, 2019
Feature request: Polymorphic kinds in Data.Functor.Classes

#16276 · opened Feb 01, 2019 by Langston Barrett 5 Pnormal PolyKinds Trac import feature request
- 0
updated Jul 07, 2019
Additions to Control.Exception: withException, displaySomeExceptionType

#16301 · opened Feb 10, 2019 by dsf 5 Pnormal Trac import core libraries feature request
- 3
updated Oct 21, 2020
Improve confusing error message with MINIMAL pragma

#16314 · opened Feb 13, 2019 by Levent Erkök 5 Pnormal Trac import feature request
- 9
updated Jul 07, 2019
`-package-env=` in OPTIONS_GHC not supported

#16316 · opened Feb 14, 2019 by Herbert Valerio Riedel 7 Phigh Trac import feature request
- 0
updated Jul 07, 2019
Feature request: Data.Foldable.asumMap

#16332 · opened Feb 17, 2019 by Joseph C. Sible 5 Pnormal Trac import core libraries feature request
- 2
updated Dec 25, 2019
Extend constant folding operations to bit manipulations

#16351 · opened Feb 22, 2019 by Mateusz Kowalczyk 5 Pnormal Trac import feature request
- 3
updated Jul 07, 2019
Modular constant folding

#16363 · opened Feb 25, 2019 by Sylvain Henry 5 Pnormal Trac import feature request
- 2
updated Jul 07, 2019
Strict version of `foldlM`.

#16366 · opened Feb 26, 2019 by autotaker 5 Pnormal Trac import core libraries feature request
- 1
updated Jun 26, 2020
HPC's CLI is awkward

#16380 · opened Mar 02, 2019 by MaxGabriel 5 HPC Pnormal Trac import feature request
- 1
updated Jul 07, 2019
Add isBinDigit to Data.Char

#16403 · opened Mar 07, 2019 by hesiod 5 Pnormal Trac import core libraries feature request
- 1
updated Jun 26, 2020
hpc should render information about the run in its html markup

#2075 · opened Feb 04, 2008 by dons 5 HPC Pnormal Trac import feature request
- 0
updated Jul 07, 2019
Pseudo terminal and process-1.2.0.0

#8844 · opened Mar 04, 2014 by ksamborski 5 Pnormal Trac import external-process feature request
- 0
updated Jul 07, 2019
Implement dependency tracking output proposal

#16446 · opened Mar 15, 2019 by Ben Gamari GHC API feature request well-typed priorities
- 3
updated Apr 27, 2019
Way to get all "unbound ids" in a Core expression

#16462 · opened Mar 19, 2019 by Michael Peyton Jones GHC API feature request
- 2
updated Mar 21, 2019
Take the idea of build roots a bit more seriously

#16481 · opened Mar 23, 2019 by Matthew Pickering feature request hadrian infrastructure
- 10
updated Jan 05, 2020
feature request: warn if OverloadedStrings provides valid semantics

#16496 · opened Mar 25, 2019 by Ayman Nadeem OverloadedStrings error messages feature request
- 4
- 3
updated Sep 03, 2019
Enable plugins to access comments

#16506 · opened Mar 28, 2019 by lazac feature request plugins
- 4
updated Aug 17, 2019
Make ghc-heap multi-platform

#16564 · opened Apr 10, 2019 by John Ericson feature request ghc-heap
- 3
- 3
updated Oct 03, 2019
Flag for core-to-core pass that adds safe FFI bytearray pinnedness check

#16589 · opened Apr 18, 2019 by Andrew Martin feature request
- 4
updated Jul 01, 2019
TVar with unpacked machine integer

#16599 · opened Apr 22, 2019 by Andrew Martin ⊥ 1 Plow STM feature request ghc proposal
- 12
updated May 06, 2020
Precision of `threadDelay` with -threaded could be increased on Linux

#16601 · opened Apr 24, 2019 by takano-akio I/O manager feature request
- 3
updated Jun 26, 2020
Dumping GHC Core when mixin instantiates indefinite module

#16612 · opened Apr 30, 2019 by Andrew Martin ⊥ 1 Plow feature request question
- 1
updated Jul 07, 2019
Add unfoldings for local bindings outside the simplifier

#16615 · opened Apr 30, 2019 by Michael Peyton Jones feature request plugins simplifier
- 48
updated Aug 16, 2019
Relax requirements on hidden modules in GHCi

#16622 · opened May 02, 2019 by parsonsmatt GHCi feature request
- 0
updated May 07, 2019
TypeRep fingerprints for arrow types are problematic

#16626 · opened May 03, 2019 by David Feuer Typeable feature request
- 3
updated May 22, 2019
GHCI: Multiline mode

#16634 · opened May 07, 2019 by 3noch GHCi feature request
- 8
updated May 15, 2019
Eq1, Show1 etc. instances for Data.Semigroup.{First,Last}

#16636 · opened May 07, 2019 by Simon Jakobi core libraries feature request
- 6
updated Jun 02, 2020
Make Hadrian CWD-aware

#16667 · opened May 17, 2019 by Alp Mestanogullari Make removal feature request hadrian testsuite
- 5
updated Jan 05, 2020
Communicate to user why a module is being compiled to object code when being loaded into GHCi

#16671 · opened May 18, 2019 by Michael Sloan GHCi feature request
- 2
updated May 18, 2019
Making hadrian/ghci.sh work executing :main

#16672 · opened May 18, 2019 by Matthew Pickering feature request infrastructure
- 4
updated Jan 15, 2020
Can't use multiple names in a standalone kind signature

#16754 · opened Jun 05, 2019 by Ryan Scott StandaloneKindSignatures feature request
- 8
updated Jan 07, 2020
RISC-V support

#16783 · opened Jun 08, 2019 by Ben Gamari feature request
- 3
- 16
updated Nov 07, 2020
Make heap profiling less guesswork by giving more control to Haskell program

#16788 · opened Jun 09, 2019 by Daniel Gröber (dxld) feature request profiling
- 1
- 3
updated Jul 18, 2019
Consider turning on -xt by default when profiling

#16795 · opened Jun 10, 2019 by Matthew Pickering feature request profiling
- 1
- 6
updated Dec 21, 2020
Always inline code which would result in static indirections.

#16831 · opened Jun 16, 2019 by Andreas Klebinger code generation feature request pointer tagging runtime perf
- 16
updated Jan 20, 2020
Enforcing laziness or strictness annotations on data fields

#16836 · opened Jun 16, 2019 by Simon Jakobi feature request
- 6
updated Jun 21, 2019
LLVM tools should be bundled on Windows

#16851 · opened Jun 21, 2019 by Sophie Taylor ⊥ 2 Plow Windows feature request
- 1
- 6
updated Jul 07, 2019
mini-ghc

#16852 · opened Jun 22, 2019 by Michael L. 3 Plow feature request
- 3
updated Jul 30, 2019
Implement escape analysis for stack allocation.

#16891 · opened Jul 01, 2019 by Andreas Klebinger ⊥ 1 Plow code generation feature request runtime perf
- 1
- 10
updated Oct 27, 2020