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  • Glasgow Haskell Compiler
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  • #15761

Closed
Open
Created Oct 17, 2018 by Richard Eisenberg@raeDeveloper

pprFamInstLHS drops parentheses

If I say

data family (a + b) c d

data instance (Int + Bool) Double = Float

GHC says

    • Expecting one more argument to ‘Int + Bool Double’
      Expected a type, but ‘Int + Bool Double’ has kind ‘* -> *’
    • In the data instance declaration for ‘+’

Note the missing parens in the first line of the error.

Will fix shortly.

Trac metadata
Trac field Value
Version 8.6.1
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
Differential revisions
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