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Panic on degenerate closed type family

    • Closed Issue created by Krzysztof Gogolewski @monoidal

    Creating a degenerate closed type family via TH gives a panic in toBranchList.

    module T where

import Language.Haskell.TH

x = do n <- newName "F"
       return [ClosedTypeFamilyD n [] Nothing []]
    module A where

import T

$(x)
    Trac metadata
    Trac field Value
    Version 7.7
    Type Bug
    TypeOfFailure OtherFailure
    Priority normal
    Resolution Unresolved
    Component Compiler (Type checker)
    Test case
    Differential revisions
    BlockedBy
    Related
    Blocking
    CC
    Operating system
    Architecture
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