#3964: Impossible happened when using ViewPattern in Arrows
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Reporter: uzytkownik | Owner: simonpj
Type: bug | Status: merge
Priority: high | Milestone: 6.12.3
Component: Compiler | Version: 6.12.1
Keywords: | Difficulty:
Os: Linux | Testcase: arrows/should_compile/T3964
Architecture: x86_64 (amd64) | Failure: Compile-time crash
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Changes (by simonpj):
* status: new => merge
* testcase: => arrows/should_compile/T3964
Comment:
Great report thanks. Fixed by
{{{
Fri Apr 9 17:55:57 BST 2010 [email protected]
* Fix Trac #3964: view patterns in DsArrows
Just a missing case; I've eliminated the catch-all so
that we get a warning next time we extend HsPat
M ./compiler/deSugar/DsArrows.lhs -1 +2
}}}
Maybe merge to 6.12.3
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3964#comment:7>
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