#7142: ghc: panic! (the 'impossible' happened) when using lowercase eq/show in
deriving
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Reporter: mbrodersen | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.4.1 | Keywords:
Os: Linux | Architecture: x86
Failure: Compile-time crash | Testcase:
Blockedby: | Blocking:
Related: |
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Compiling the following:
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module Main where
data Tree a = Edge a | Node (Tree a) (Tree a)
deriving (eq,show)
main10 = print $ Node (Edge 10) (Edge 20)
main = main10
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Results in:
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ghc: panic! (the 'impossible' happened)
(GHC version 7.4.1 for i386-unknown-linux):
nameModule eq{tv a9O}
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7142>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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