#5315: panic in idInfoToAmode with -O
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Reporter: mikhail.vorozhtsov | Owner:
Type: bug | Status: new
Priority: high | Milestone: 7.2.1
Component: Compiler | Version: 7.1
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: Compile-time crash
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Comment(by mikhail.vorozhtsov):
Replying to [comment:1 simonmar]:
> Is this a regression?
Probably no. If I remove the equality superclass "l ~ (HHead l :* HTail
l)" from the HNonEmpty class declaration the panic goes away. Equality
constraints in class contexts were implemented just recently.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5315#comment:2>
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