[GHC] #13031: Bogus calculation of bottoming arity

[GHC]

#13031: Bogus calculation of bottoming arity
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        Reporter:  simonpj           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      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:                    |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"f06b71ae2e76ec81a618bc8bb0409b3fc6a7ebbe/ghc" f06b71a/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="f06b71ae2e76ec81a618bc8bb0409b3fc6a7ebbe"
 Fix a bug in ABot handling in CoreArity

 See Note [ABot branches: use max] in CoreArity.

 I stumbled on this when investigating something else, and
 opened Trac #13031 to track it.

 It's very hard to tickle the bug, which is why it has lurked so long,
 but the test
    stranal/should_compile/T13031
 does so

 Oddly, the testsuite framework doesn't actually run the test; I have
 no idea why.
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13031#comment:1>
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