ghc: panic! (the 'impossible' happened)
Foo.hs:6:3:ghc: panic! (the 'impossible' happened)
(GHC version 7.6.3 for i386-unknown-linux):
kindFunResult ghc-prim:GHC.Prim.*{(w) tc 34d}
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
The source file has to contain, merely:
l :: m a -> t m a
l = undefined
f :: a -> f b
f = do
x <- undefined
l $ x undefined
main = return ()This panic reproduces on at least: 7.6.1, 7.6.2, 7.6.3.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.6.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
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| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |