"impossible" failure while type checking
$ cat failure.hs
import Control.Monad.Trans.Class
oops :: () -> IO () -> IO ()
oops = lift . lift
main = return ()
$ ghc failure.hs
[1 of 1] Compiling Main ( failure.hs, failure.o )
failure.hs:3:8:ghc: panic! (the 'impossible' happened)
(GHC version 7.6.3 for i386-apple-darwin):
kindFunResult ghc-prim:GHC.Prim.*{(w) tc 34d}
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Trac metadata
Trac field | Value |
---|---|
Version | 7.6.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler (Type checker) |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |