[GHC] #4497: hmatrix-0.10.0.0 fails to build with GHC 7.0.1 (worked with 7.0.0.20101111)

[GHC]

#4497: hmatrix-0.10.0.0 fails to build with GHC 7.0.1 (worked with 7.0.0.20101111)
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    Reporter:  luite                                     |        Owner:              
        Type:  bug                                       |       Status:  merge       
    Priority:  normal                                    |    Milestone:              
   Component:  Compiler                                  |      Version:  7.0.1       
    Keywords:  hmatrix context reduction stack overflow  |     Testcase:              
   Blockedby:                                            |   Difficulty:              
          Os:  Windows                                   |     Blocking:              
Architecture:  Unknown/Multiple                          |      Failure:  None/Unknown
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Changes (by simonpj):

  * status:  new => merge


Comment:

 The original bug is fixed by
 {{{
 Thu Nov 18 12:05:33 GMT 2010  simonpj at microsoft.com
   * Move the superclass generation to the canonicaliser

   Doing superclass generation in the canonicaliser (rather than
   TcInteract) uses less code, and is generally more efficient.

   See Note [Adding superclasses] in TcCanonical.

   Fixes Trac #4497.

     M ./compiler/typecheck/TcCanonical.lhs -4 +88
     M ./compiler/typecheck/TcInteract.lhs -109 +25
 }}}
 Please merge.

 luite: can you try with HEAD (as of now)?

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4497#comment:12>
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