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  • Glasgow Haskell Compiler
  • GHCGHC
  • Issues

  • Open 326
  • Closed 1,047
  • All 1,373
New issue
  • Priority Created date Last updated Milestone due date Due date Popularity Label priority Manual Title Weight Blocking
  • GHCi >= 9.2.1 prints type signatures containing type families in an ugly way
    #20974 · created Jan 20, 2022 by Andrzej Rybczak   9.2.2   GHCi Pnormal Tbug pretty printing typechecker
    • CLOSED
    • 3
    • 13
    updated May 20, 2022
  • GHC panic
    #21479 · created May 03, 2022 by Icelandjack   9.2.3   Pnormal Tbug compiler crash typechecker
    • CLOSED
    • 2
    • 5
    updated May 19, 2022
  • ghc.exe: panic! (the 'impossible' happened) using a data family in GHC 9.0.1
    #21581 · created May 16, 2022 by UltimateDude101   No skolem info Pnormal Tbug typechecker
    • CLOSED
    • 2
    updated May 18, 2022
  • mightEqualLater finds an unbound cbv
    #20231 · created Aug 14, 2021 by YellPika   9.2.2   Phigh Tbug typechecker
    • CLOSED
    • 2
    • 9
    updated May 09, 2022
  • TypeInType is marked as deprecated but has no warning on usage.
    #21500 · created May 04, 2022 by Trevis Elser   Pnormal Tbug typechecker
    • CLOSED
    • 1
    updated May 05, 2022
  • GHC sessions (--make, --interactive, GHC API) erroneously retain instances
    #2182 · created Mar 28, 2008 by claus.reinke@talk21.com   7.10.1   5   GHCi Pnormal Tbug Trac import typechecker
    • CLOSED
    • 14
    updated Apr 29, 2022
  • Add syntactic equality relation
    #21239 · created Mar 16, 2022 by sheaf   Pnormal Ttask constraint solver representation polymorphism typechecker
    • CLOSED
    • 9
    • 5
    updated Apr 28, 2022
  • Hole-y partial type signatures greatly slow down compile times
    #14766 · created Feb 06, 2018 by Alec Theriault   5   Pnormal Tbug Trac import compiler perf partial type sigs typechecker
    • CLOSED
    • 3
    • 21
    updated Apr 28, 2022
  • decideMonoTyVars doesn't handle coercion variables in "candidates"
    #21404 · created Apr 19, 2022 by sheaf   Pnormal Tquestion defaulting representation polymorphism typechecker
    • CLOSED
    • 3
    • 3
    updated Apr 27, 2022
  • Assertion in reportWanteds is too strict
    #21405 · created Apr 20, 2022 by sheaf   Pnormal Tbug error messages typechecker
    • CLOSED
    • 2
    • 2
    updated Apr 27, 2022
  • Use ConcreteTv for metavariables that must only be unified with concrete types
    #20972 · created Jan 20, 2022 by sheaf   Pnormal Tbug representation polymorphism typechecker
    • CLOSED
    • 2
    updated Apr 14, 2022
  • Improve instantiation of datacons
    #18481 · created Jul 20, 2020 by Krzysztof Gogolewski   LinearTypes Ttask typechecker
    • CLOSED
    • 1
    • 6
    updated Apr 12, 2022
  • Definition of heterogeneous equality rejected unless using a SAKS
    #21126 · created Feb 23, 2022 by sheaf   9.4.1   CUSKs GADTs Pnormal StandaloneKindSignatures Ttask documentation typechecker
    • CLOSED
    • 6
    updated Apr 07, 2022
  • Allow foreign prim to return Any
    #10460 · created May 29, 2015 by Edward Z. Yang   8.0.1   5   Pnormal Tfeature request Trac import typechecker
    • CLOSED
    • 6
    updated Mar 28, 2022
  • GHC doesn't notice some overlapping instances (regression)
    #21208 · created Mar 09, 2022 by Richard Eisenberg   9.2.3   Phigh Tbug program incorrectly accepted regression typechecker
    • CLOSED
    • 16
    • 1
    • 6
    updated Mar 28, 2022
  • Quantified constraint blocks functional dependency
    #21209 · created Mar 09, 2022 by Richard Eisenberg   FunctionalDependencies Plow QuantifiedConstraints Tbug typechecker
    • CLOSED
    • 3
    updated Mar 25, 2022
  • GHC accepts two names for the same kind variable
    #20916 · created Jan 07, 2022 by Simon Peyton Jones   Pnormal StandaloneKindSignatures Tbug program incorrectly accepted typechecker
    • CLOSED
    • 1
    • 4
    updated Mar 22, 2022
  • Typed holes regression in GHC 8.0.2: No skolem info: z_a1sY[sk:2]
    #14040 · created Jul 27, 2017 by Ryan Scott   5   Pnormal Tbug Trac import TypeFamilies TypeInType compiler crash partial type sigs typechecker typed holes
    • CLOSED
    • 20
    updated Mar 22, 2022
  • No skolem info panic involving typed hole
    #20063 · created Jun 29, 2021 by sheaf   No skolem info Pnormal Tbug compiler crash typechecker typed holes
    • CLOSED
    • 3
    updated Mar 22, 2022
  • Order-dependent type inference due to Note [Instance and Given overlap]
    #18910 · created Oct 30, 2020 by Richard Eisenberg   Pnormal Tbug TypeFamilies constraint solver typechecker
    • CLOSED
    • 3
    • 5
    updated Mar 15, 2022
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