Template Haskell panic with class names
File Bug.hs:
module Bug where
foo = ''Show
Compile using:
ghc -c -fth Bug.hs
Result:
ghc-6.4.1: panic! (the `impossible' happened, GHC version 6.4.1):
lookupDeprec GHCziShow.Show{tc 2h}
Please report it as a compiler bug to glasgow-haskell-
bugs@haskell.org,
or http://sourceforge.net/projects/ghc/.
The panic does not happen if the type class or one of its method is
actually used in the same module.
Trac metadata
Trac field |
Value |
Version |
6.4 |
Type |
Bug |
TypeOfFailure |
OtherFailure |
Priority |
normal |
Resolution |
ResolvedFixed |
Component |
Template Haskell |
Test case |
|
Differential revisions |
|
BlockedBy |
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Related |
|
Blocking |
|
CC |
|
Operating system |
|
Architecture |
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