[GHC] #783: performance problem compiling large file

[GHC]

#783: performance problem compiling large file
-----------------------+----------------------------------------------------
  Reporter:  guest     |          Owner:          
      Type:  bug       |         Status:  new     
  Priority:  normal    |      Milestone:          
 Component:  Compiler  |        Version:  6.4.2   
  Severity:  normal    |     Resolution:          
  Keywords:            |             Os:  Multiple
Difficulty:  Unknown   |   Architecture:  Multiple
-----------------------+----------------------------------------------------
Changes (by simonmar):

  * architecture:  x86 => Multiple
  * severity:  major => normal
  * summary:  ghc internal error => performance problem compiling large
              file
  * os:  Windows => Multiple

Old description:

> Windows XP, GHC 6.4.2 binary package.
>
> Will attach the relevant module.
>
> ...
> Compiling Dist             ( ./Dist.hs, ./Dist.o )
> ghc: internal error: update_fwd: unknown/strange object  0
>     Please report this as a compiler bug.  See:
>     http://www.haskell.org/ghc/reportabug

New description:

 Windows XP, GHC 6.4.2 binary package.

 Will attach the relevant module.

 {{{
 ...
 Compiling Dist             ( ./Dist.hs, ./Dist.o )
 ghc: internal error: update_fwd: unknown/strange object  0
     Please report this as a compiler bug.  See:
     http://www.haskell.org/ghc/reportabug
 }}}

Comment:

 I'm 99% certain the crash has been fixed; see #787.  However I tried the
 attached file, and it loaded without error on my 6.4.2 installation here.

 Changing the title to reflect the performance problem, this is definitely
 an issue.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/783>
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