[GHC] #8029: batch-mode recompilation checking sometimes fails

[GHC]

#8029: batch-mode recompilation checking sometimes fails
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        Reporter:  jwlato            |                   Owner:
            Type:  bug               |                  Status:  closed
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.6.3
      Resolution:  wontfix           |                Keywords:
Operating System:  Unknown/Multiple  |  recompilation, batch-mode
 Type of failure:  None/Unknown      |            Architecture:
      Blocked By:                    |  Unknown/Multiple
 Related Tickets:                    |               Test Case:
                                     |                Blocking:
                                     |  Differential Revisions:
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Comment (by thomie):

 For completeness, here is an example error message that mentions the
 package name `containers` for an ambiguous import with GHC 7.8.4:

 {{{
 Test.hs:5:14:
     Ambiguous occurrence ‘fromList’
     It could refer to either ‘Data.Map.fromList’,
                              imported from ‘Data.Map’ at Test.hs:2:1-15
                              (and originally defined at Data/Map.hs:2:1-8)
                           or ‘Data.Map.fromList’,
                              imported from ‘Data.Map’ at Test.hs:3:1-28
                              (and originally defined in
 ‘containers-0.5.5.1:Data.Map.Base’)
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8029#comment:8>
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