internal error: weird activation record found on stack: 9

[Peter Simons]

Hi,

I'm getting this error in my software every now and then:

  postmaster: internal error: scavenge_stack: weird activation record found on stack: 9
      Please report this as a bug to glasgow-haskell-bugs at haskell.org,
      or http://www.sourceforge.net/projects/ghc/

The process runs just fine for several days, and then it
crashes with this message out of the sudden. There is no
apparent cause. I'm using a fairly recent CVS ghc to compile
the program on Linux/x86.

Any idea what I can do to help tracking this bug down?

Peter