#4200: UndecidableInstances not needed for equality constraints
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Reporter: simonpj | Owner:
Type: bug | Status: closed
Priority: normal | Milestone: 7.0.1
Component: Compiler | Version: 6.12.3
Resolution: fixed | Keywords:
Testcase: indexed-types/should_compile/T4200 | Blockedby:
Difficulty: | Os:
Unknown/Multiple
Blocking: | Architecture:
Unknown/Multiple
Failure: None/Unknown |
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Changes (by simonpj):
* status: new => closed
* testcase: => indexed-types/should_compile/T4200
* resolution: => fixed
Comment:
Fixed by
{{{
Sun Sep 19 17:26:23 GMT Daylight Time 2010 [email protected]
* Loosen the conditions for -XUndecidableInstances; fixes Trac #4200
M ./compiler/typecheck/TcMType.lhs -8 +6
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4200#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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