#2962: Fix space leak in genericLength
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Reporter: thorkilnaur | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: libraries/base | Version: 6.11
Severity: normal | Resolution:
Keywords: | Testcase:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
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Comment (by NeilMitchell):
The patch is incorrect. If the (+) function isn't strict in both arguments
then you are too strict.
You could always add genericLength', and add specialisation rules for
genericLength on Int/Integer/Float/Double, which gets you all the benefits
in the common cases but still preserves the semantics.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2962#comment:1>
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