Bug Report: stg_ap_p_ret

Good day.  I'm using GHC 6.2.1, and have had much
success with it.  However, yesterday I got a strange
error I've never before seen.

Mosaic: internal error: stg_ap_p_ret
    Please report this as a bug to glasgow-haskell-
        bugs@xxxxxxxxxxx, or 
        http://www.sourceforge.net/projects/ghc/

I'm running Windows XP Service Pack 1.

The only obvious thing from the run is that several
generation 1 garbage collections resulted in a
substantially smaller allocation than before (99% of
all space was free over these two collections) and
something "bad" happened.

I've included the console data (trace output, the
-Sstderr output, the parameters used to run the
program, the OS version at the top...), as well as the
code for the main module, the .hi file, and the .o
file (in case these help).

Neither the main module nor any of its included
modules use FFI in any capacity.  Use of unsafe IO is
limited to caching and tracing.

Note:  the reference to "threads" solved, killed, etc.
are to an abstraction of a "DeductiveThread" for a
backtracking algorithm, which is the core logic of
this program.  No modules in this program use
Control.Concurrent in any capacity.

I'd be happy to provide additional details, additional
source, etc.  I'm going to rerun the program and see
if the problem reoccurs:  the program does use
randomness, so it's possible that the problem won't
appear again.

The easiest way to contact me is at this email
address.  I check it regularly during the week, and
periodically over the weekend.  Please don't hesitate
to ask if you have any questions, or if there's some
other way I can help.  I've quite enjoyed the GHC
product, have written some significantly non-trivial
programs using it, and would be happy to assist in
making it a better and more robust tool.

Thanks, and I look forward to hearing from you...

oriel


                
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