#3280: The order of arguments to the function passed to nubBy got swapped somehow
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Reporter: guest | Owner:
Type: bug | Status: closed
Priority: normal | Milestone: 6.12.1
Component: libraries/base | Version: 6.10.3
Resolution: wontfix | Keywords:
Operating System: Unknown/Multiple | Architecture: Unknown/Multiple
Type of failure: None/Unknown | Difficulty: Unknown
Test Case: |
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Comment (by Herbert Valerio Riedel <hvr@…>):
In [changeset:"a2e7bbfe7656cf7dbf1af4da5c077ac0b5d41127/ghc"]:
{{{
#!CommitTicketReference repository="ghc"
revision="a2e7bbfe7656cf7dbf1af4da5c077ac0b5d41127"
Preserve argument order to (==)/eq in nub and nubBy
This makes nub and nubBy behave as specified in the Haskell 98 Report.
This reverts 0ad9def53842e86fb292eccb810190711c42d7c5, and
fixes #3280, #7913 and #2528 (properly).
Before this change, the output of `T2528` was (4x wrong):
```
[A,B]
[1,2]
False
False
```
Reviewed By: dfeuer, ekmett, austin, hvr
Differential Revision: https://phabricator.haskell.org/D238
}}}
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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3280#comment:5>
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