Panic in TcEvidence due to wrong role
This single line tickles it:
convert d = let d' = case d of '0' -> '!' in d'
produces
ghc: panic! (the 'impossible' happened)
(GHC version 7.11.20150604 for x86_64-apple-darwin):
ASSERT failed!
file compiler/typecheck/TcEvidence.hs line 600 Sym cobox_af8M
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
The failing assertion is about roles. Will look into this tomorrow.
Labeling this "highest" because it's a very silly regression.
Trac metadata
Trac field | Value |
---|---|
Version | 7.11 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | highest |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |