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  • Glasgow Haskell Compiler
  • GHCGHC
  • Issues

  • Open 6
  • Closed 4
  • All 10
New issue
  • Priority Created date Last updated Milestone due date Due date Popularity Label priority Manual Title Weight Blocking
  • Bottom dictionaries can be derived with QuantifiedConstraints, UndecidableInstances and UndecidableSuperClasses
    #19690 · created Apr 12, 2021 by aadaa-fgtaa   Pnormal QuantifiedConstraints Tbug UndecidableSuperClasses typechecker
    • 5
    updated Apr 16, 2021
  • The `solveWanteds` error message is pretty awful.
    #19627 · created Apr 01, 2021 by Edward Kmett   Pnormal Tbug UndecidableSuperClasses error messages
    • 6
    updated Aug 13, 2021
  • 8.10: Overlapping instances claimed where there are none (or crash in 8.8)
    #18129 · created May 02, 2020 by Serge Kosyrev   GADTs OverlappingInstances Pnormal Tbug TypeFamilies UndecidableSuperClasses UndecideableInstances
    • 1
    • 3
    updated Jul 01, 2020
  • UndecidableSuperClasses - Could not deduce (Category d)
    #14010 · created Jul 22, 2017 by Vladislav Zavialov   5   Pnormal Tbug Trac import UndecidableSuperClasses
    • 5
    updated Jul 07, 2019
  • Can't solve constraints with UndecidableSuperClasses but can infer kind (+ undesired order of kinds)
    #12131 · created May 29, 2016 by Icelandjack   5   Pnormal Tbug Trac import UndecidableSuperClasses typechecker
    • 7
    updated Jul 07, 2019
  • Infinite Loop when mixing UndecidableSuperClasses and the class/instance constraint synonym trick.
    #11523 · created Feb 01, 2016 by Edward Kmett   8.4.1   7   Phigh Tbug Trac import UndecidableSuperClasses typechecker
    • 30
    updated Jul 07, 2019