#7545: Type variable capture in InstanceSigs message
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Reporter: Feuerbach | Owner:
Type: bug | Status: merge
Priority: normal | Milestone:
Component: Compiler | Version: 7.6.1
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: None/Unknown
Difficulty: Unknown | Testcase: typecheck/should_fail/T7545
Blockedby: | Blocking:
Related: |
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Changes (by simonpj):
* status: new => merge
* difficulty: => Unknown
* testcase: => typecheck/should_fail/T7545
Comment:
Good point, thank you. Now we get
{{{
T7545.hs:8:9:
Method signature does not match class; it should be
f :: forall b1. (a -> b) -> b1
In the instance declaration for `C (a -> b)'
}}}
Merge to 7.6 if it's easy.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7545#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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