[GHC] #9254: Entered absent argument (again)

[GHC]

#9254: Entered absent argument (again)
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        Reporter:  simonpj           |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:  7.8.4
       Component:  Compiler          |          Version:  7.8.2
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"d6ee82b29598dcc1028773dd987b7a2fb17519b7/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="d6ee82b29598dcc1028773dd987b7a2fb17519b7"
 Fix demand analyser for unboxed types

 This is a tricky case exposed by Trac #9254.  I'm surprised it hasn't
 shown up before, because it's happens when you use unsafePerformIO in
 the right way.

 Anyway, fixed now.  See Note [Analysing with absent demand]
 in Demand.lhs
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9254#comment:1>
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