THREAD_ID 0xb7e3fa40 (swapped in): /home/aldem/src/pike/cvs/Pike-v7.7-snapshot/build/linux-2.6.8-24.3-smp-i686/master.pike:2372: _main(array[8], array[57])
Due to some mysterious reason stack is corrupted so heavily that it cannot be used to backtrace anything...
Well, the first thread is in master.pike line 2372, so it can't be that bad?
Note that the C stack and the Pike stack are totally different entities, so both are rarely destroyed at the same time.
You might want to compile without --fomit-frame-pointer, in case that optimization is on. It's a sure stack-eater. Also you can try with --without-machine-code to get better stacks.