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  • Glasgow Haskell CompilerGlasgow Haskell Compiler
  • GHCGHC
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  • #4139
Closed
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Issue created Jun 16, 2010 by blarsen@trac-blarsen

Spurious non-exhaustive pattern match warnings are given using GADTs

When using slightly complicated GADTs, GHC gives me erroneous non-exhaustive pattern match warnings. I have attached an example. I have observed this behavior in the four versions of ghc that I tried (6.10.4, and 6.12.{1,2,3}).

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Version 6.12.3
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
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