Multiple constraint wildcards allowed with PartialTypeSignatures
The wiki states that
As a single extra-constraints wildcard is enough to infer any number of constraints, only one is allowed in a type signature and it should come last in the list of constraints.
However the following program compiles with GHC 7.10.1
{-# LANGUAGE PartialTypeSignatures #-}
f :: (Eq a, _, _) => a -> a -> Bool
f x y = x == yTrac metadata
| Trac field | Value |
|---|---|
| Version | 7.10.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | alanz |
| Operating system | |
| Architecture |