Hi
I wonder if this is related to the reason that optimization is turned off for certain files (search for "Modules to be compiled without optimization" in src/Makefile.in). During the static analysis and type checking phases, the mark phase of the Hugs garbage collector also looks for cells on the C stack (this is omitted during evaluation, because all the primitives are carefully written to ensure that everything is reachable from the Hugs stack). Optimization may obscure these cell references, which would certainly cause crashes.
Oh, I had no idea that optimisation was turned off for certain files - with the Windows build its turned on for all files. I guess if something is that sensitive to optimisation, the Windows compiler could be doing anything to it... Thanks Neil