[GHC] #3691: Error message doesn't mention necessary extension in warning

[GHC]

#3691: Error message doesn't mention necessary extension in warning
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  Reporter:  arsenm                             |          Owner:                  
      Type:  feature request                    |         Status:  reopened        
  Priority:  normal                             |      Milestone:                  
 Component:  Compiler                           |        Version:  6.10.4          
Resolution:                                     |       Keywords:                  
Difficulty:                                     |             Os:  Unknown/Multiple
  Testcase:                                     |   Architecture:  Unknown/Multiple
   Failure:  Incorrect warning at compile-time  |  
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Comment (by simonpj):

 It took me a while to parse, but I understand Isaac to be saying:

  * Isaac supports the proposal described above under "But the proposal
 is..."

 Isaac's argument is: we should encourage people to avoid code whose
 behaviour would change with `ScopedTypeVariables`.  I agree.  Anyone else?

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3691#comment:9>
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