[GHC] #10746: No non-exhaustive pattern match warning given for empty case analysis
GHC
ghc-devs at haskell.org
Sun Apr 10 05:59:01 UTC 2016
#10746: No non-exhaustive pattern match warning given for empty case analysis
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Reporter: bgamari | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.10.2
Resolution: | Keywords:
| PatternMatchWarnings
Operating System: Unknown/Multiple | Architecture:
Type of failure: Incorrect | Unknown/Multiple
warning at compile-time | Test Case:
Blocked By: | Blocking:
Related Tickets: #7669, #11806 | Differential Rev(s):
Wiki Page: |
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Comment (by erikd):
Hmm, wit this fix, building base fails due to:
{{{
absurd :: Void -> a
absurd a = case a of {}
}}}
which triggers:
{{{
libraries/base/Data/Void.hs:66:12: warning: [-Wincomplete-patterns]
Pattern match(es) are non-exhaustive
In a case alternative: Patterns not matched: _
}}}
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10746#comment:11>
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