[GHC] #1133: auto-derivation of Enum is disallowed with recursive imports

[GHC]

#1133: auto-derivation of Enum is disallowed with recursive imports
----------------------+-----------------------------------------------------
 Reporter:  heatsink  |          Owner:  simonpj
     Type:  bug       |         Status:  new    
 Priority:  normal    |      Milestone:  6.6.1  
Component:  Compiler  |        Version:  6.6    
 Severity:  normal    |     Resolution:         
 Keywords:            |     Difficulty:  Unknown
 Testcase:            |   Architecture:  Unknown
       Os:  Unknown   |  
----------------------+-----------------------------------------------------
Changes (by igloo):

  * milestone:  => 6.6.1
  * owner:  => simonpj

Comment:

 I can reproduce this with 6.6, HEAD and 6.6-branch on amd64/Linux.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1133>
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