bug in compacting GC

[Simon Marlow]

Bulat Ziganshin wrote:
> Hello Simon,
> 
> Monday, February 06, 2006, 5:20:17 PM, you wrote:
> 
> SM> I think this may be a different bug - I can reproduce it, but not with
> SM> the current STABLE branch.  It is probably the freeze/thaw bug that was 
> SM> fixed after 6.4.1.
> 
> SM> However, I've still seen strange crashes in STABLE when using +RTS -c. 
> SM> We build stage 3 of the nightly build with +RTS -c every night, and 
> SM> right now we aren't getting any crashes, but a few weeks ago we were. 
> SM> When I looked into it, I couldn't get a deterministically repeatable 
> SM> crash - every tiny change made the crash go away.
> 
> i think that my problems is because of this bug, if it is far more
> frequent. at least i will be glad if ghc and my program will be no
> more crashed. one problem why i postpone downloading of current stable
> compiler is the http://hackage.haskell.org/trac/ghc/ticket/637 bug.

I suggest you just download STABLE and try to use it.  The bug occurs 
much less frequently with the latest STABLE.  If you can reproduce it, 
we really need to know about it.

 > can you please try to fix it?

I'm doing my best :-/

Cheers,
	Simon