#3280: The order of arguments to the function passed to nubBy got swapped somehow -------------------------------------+--------------------------------- 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: | -------------------------------------+--------------------------------- Comment (by Herbert Valerio Riedel ): 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 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/3280#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler