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  • Glasgow Haskell Compiler
  • GHCGHC
  • Issues

  • Open 1,080
  • Closed 1,421
  • All 2,501
New issue
  • Priority Created date Last updated Milestone due date Due date Popularity Label priority Manual Weight
  • 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
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