Re: [GHC] #16091: arith011 broken with integer-simple

27 Dec 2018

      #16091: arith011 broken with integer-simple
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.6.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |  https://gitlab.haskell.org/ghc/ghc/merge_requests/36
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Comment (by Ben Gamari ):

 In [changeset:"bbea972149882b4f5f6b0a1691488a519ba6aaf9/ghc"
 bbea9721/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="bbea972149882b4f5f6b0a1691488a519ba6aaf9"
 Division fails fast for `divMod` \w integer-simple

 We want to match the behaviour of `Integer` as well as
 `Integer`/`Natural` from `integer-gmp`, namely to have

      divMod x 0 = _|_

 not

      divMod x 0 = (_|_, _|_)

 See #16091 for an example of where this matters.
 }}}

-- 
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16091#comment:3
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