ghc accepts non-standard type without language extension
Ghc accepts this
f :: Eq a => Eq b => a -> b -> Bool
f a b = a==a && b==bThe nested contexts should require some language extension.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.8.4 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |