[GHC] #370: possible compacting GC bug in 6.4.x

[GHC]

#370: possible compacting GC bug in 6.4.x
-----------------------------+----------------------------------------------
  Reporter:  zooko           |          Owner:  simonmar
      Type:  bug             |         Status:  assigned
  Priority:  high            |      Milestone:  6.4.2   
 Component:  Runtime System  |        Version:  6.4.1   
  Severity:  critical        |     Resolution:  None    
  Keywords:                  |             Os:  Unknown 
Difficulty:  Unknown         |   Architecture:  Unknown 
-----------------------------+----------------------------------------------
Changes (by simonmar):

  * architecture:  => Unknown
  * difficulty:  => Unknown
  * component:  None => Runtime System
  * severity:  blocker => critical
  * summary:  internal error in GHC => possible compacting GC bug in 6.4.x
  * os:  => Unknown

Old description:

> {{{
> http://bugs.darcs.net//Ticket/Display.html?id=339
>
> }}}

New description:

 [http://bugs.darcs.net//Ticket/Display.html?id=339]

Comment:

 Some notes on why this bug is still here: I suspect there is a bug in the
 compacting GC, at least in 6.4.x.  I turned on compacting collection for
 stage 3 of the nightly builds, and we have seen crashes.  However the bug
 has so far elluded my attempts to make it reproducible; the slightest
 change to the conditions makes it go away.

 As of today, the bug is not affecting the nightly STABLE builds.

-- 
Ticket URL: <http://cvs.haskell.org/trac/ghc/ticket/370>
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