ghc: panic! (the 'impossible' happened)
I got this message when trying to compile. It appears to be reproducible. Also I realize this is an outdate version of GHC so I'm going to update and see if it fixes itself.
(GHC version 7.4.1 for x86_64-unknown-linux):
compiler/rename/RnSource.lhs:429:14-81: Irrefutable pattern failed for pattern Data.Maybe.Just (inst_tyvars,
_,
SrcLoc.L _ cls,
_)
Trac metadata
Trac field | Value |
---|---|
Version | 7.4.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |