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

[GHC]

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

 Are you sure you are using -fglasgow-exts.  I have just compiled your
 example with GHC 6.6, thus
 {{{
 bash-3.1$ ghc -c -fglasgow-exts X.hs-boot X.hs
 bash-3.1$ ghc --version
 The Glorious Glasgow Haskell Compilation System, version 6.6
 bash-3.1$
 }}}
 And all is happy.  Without -fglasgow-exts it fails, because in Haskell 98
 you can't derive Enum for a newtype.

 Can you double check your test case and send and exact log of what
 happened?  Remove all .o and .hi and .hi-boot files first.

 Simon

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