#6088: GeneralizedNewtypeDeriving + TypeFamilies + Equality constraints
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Reporter: Lemming | Owner:
Type: feature request | Status: closed
Priority: normal | Milestone:
Component: Compiler (Type checker) | Version: 7.4.1
Resolution: fixed | Keywords:
Os: Unknown/Multiple | Architecture:
Unknown/Multiple
Failure: GHC rejects valid program | Difficulty: Unknown
Testcase: indexed-types/should_compile/T6088 | Blockedby:
Blocking: | Related: 3046
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Changes (by simonpj):
* status: new => closed
* difficulty: => Unknown
* resolution: => fixed
* testcase: => indexed-types/should_compile/T6088
Comment:
Thanks for pointing this out. Easily fixed.
{{{
commit 3a266f1308104ccbcca435ad9632738734e13c84
Author: Simon Peyton Jones <[email protected]>
Date: Fri Jun 8 09:44:23 2012 +0100
Allow equalities in a derived instance context
Fixes Trac #6147
compiler/typecheck/TcMType.lhs | 15 +++++++++------
1 files changed, 9 insertions(+), 6 deletions(-)
}}}
The log message is wrong .... this really is the patch for #6088
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6088#comment:1>
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