[GHC] #3391: Generics compilation failure in combination with Data.Accessor deriving

[GHC]

#3391: Generics compilation failure in combination with Data.Accessor deriving
-----------------------------------------------+----------------------------
    Reporter:  darchon                         |        Owner:  simonpj         
        Type:  bug                             |       Status:  closed          
    Priority:  normal                          |    Milestone:                  
   Component:  Compiler                        |      Version:  6.11            
    Severity:  normal                          |   Resolution:  fixed           
    Keywords:  Generics                        |   Difficulty:  Unknown         
    Testcase:  typecheck/should_compile/T3391  |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple                |  
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Changes (by simonpj):

  * testcase:  => typecheck/should_compile/T3391
  * status:  new => closed
  * resolution:  => fixed

Comment:

 Good stuff.  Fixed by
 {{{
 Thu Jul 23 16:58:03 BST 2009  simonpj at microsoft.com
   * Fix Trac #3391: make generic to/from bindings only for newly-declared
 types

   Before this patch we were bogusly making to/from bindings for all data
 types
   in the TcGblEnv.  But that is wrong when we have multiple "chunks" of
   bindings in Template Haskell.  We should start from the declarations
   themselves.  Easy.


     M ./compiler/typecheck/TcDeriv.lhs -7 +7
 }}}
 Thanks for the report

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3391#comment:2>
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