[GHC] #12966: GHC panics with forall and constraint
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Mon Dec 12 21:57:28 UTC 2016
#12966: GHC panics with forall and constraint
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Reporter: xcmw | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 8.0.1
Keywords: | Operating System: Unknown/Multiple
Architecture: | Type of failure: None/Unknown
Unknown/Multiple |
Test Case: | Blocked By:
Blocking: | Related Tickets:
Differential Rev(s): | Wiki Page:
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{{{
λ> type Maybeify c = forall d. (c d) => ((~) (Maybe d))
<interactive>:2:39: error:ghc: panic! (the 'impossible' happened)
(GHC version 8.0.1 for x86_64-apple-darwin):
print_equality ~
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
}}}
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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12966>
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