Ticket #456 (closed bug: Duplicate)
|Reported by:||volkersf||Owned by:||nobody|
|Component:||Compiler (Type checker)||Version:||6.4|
|Type of failure:||Difficulty:|
|Test Case:||Blocked By:|
The attached sample program triggers a panic because I forgot to pass the type argument in the recursive algebraic datatype construction. The commented line is correct. GHC should not panic but instead provide a helpful error message. (Unluckily, I won't be able to test this with -HEAD atm) Compiling Main ( bugs.hs, interpreted ) ghc-6.4: panic! (the `impossible' happened, GHC version 6.4): Unify.unifyTauTyLists: mismatched type lists!
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