Multiple pattern type signatures accepted
This hogwash is accepted:
pattern P :: a -> b -> Maybe (a,b)
pattern P :: foo => bar => blah -> urgh
pattern P x y = Just (x, y)A little experimentation shows that only the first pattern signature is examined. Others are accepted and ignored.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.0.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |