#4935: New type error in GHC 7.1 with TypeFamilies, Rank2Types
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Reporter: patrick_premont | Owner:
Type: bug | Status: merge
Priority: normal | Milestone:
Component: Compiler (Type checker) | Version: 7.1
Keywords: | Testcase:
indexed_types/should_compile/T4935
Blockedby: | Difficulty:
Os: Windows | Blocking:
Architecture: x86 | Failure: None/Unknown
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Changes (by simonpj):
* status: new => merge
* testcase: => indexed_types/should_compile/T4935
Comment:
Excellent! Fixed by
{{{
Fri Feb 11 17:40:58 GMT 2011 [email protected]
* New plan: push unsolved wanteds inwards
This fixes Trac #4935. See Note [Preparing inert set for implications].
Lots of comments, but not a lot of code is changed!
M ./compiler/typecheck/TcCanonical.lhs -17 +19
M ./compiler/typecheck/TcSimplify.lhs -37 +77
}}}
Lots of work by Dimitrios. Thank you!
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4935#comment:2>
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