#1551: Incorrect warning: Pattern match(es) are overlapped
-----------------------+----------------------------------------------------
Reporter: Regidor | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.6
Severity: minor | Keywords: overlapping patterns
Difficulty: Unknown | Os: Linux
Testcase: | Architecture: x86
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The following program
{{{
main = print $ f ab
a = "foo"
ab = "bar"
f :: String -> Int
f a = 0
f ab = 1
}}}
produces
{{{
Warning: Pattern match(es) are overlapped
In the definition of `f': f ab = ...
}}}
but the patterns don't overlap, i.e., if a matches, ab does not match, and
viceversa.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1551>
GHC <http://www.haskell.org/ghc/>
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