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  • Glasgow Haskell CompilerGlasgow Haskell Compiler
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  • #2528
Closed
Open
Issue created Aug 21, 2008 by jdressel@trac-jdressel

documentation for nub and nubBy should be corrected, extended or removed.

While working on a fun math/programming exercise I discovered a peculiar behavior in "nub". While it worked the vast majority of the time, there were a few cases where it failed to purge all duplicates as defined by (==). Replacing the use of "nub" with "nubBy (==)" correctly purged all cases.

I have linked a codepad evaluation that outputs the strange behavior: http://codepad.org/VNauTAam

I would have isolated the bug better for you, but like I say nub works by far the majority of the time. This must be a peculiar clash with my custom data structures and strange definition of (==).

Cheers.

Trac metadata
Trac field Value
Version 6.8.2
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
Differential revisions
BlockedBy
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Blocking
CC
Operating system
Architecture Unknown
Edited Mar 09, 2019 by george.colpitts
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