Actually, I've now figured out the bug and can reproduce it on a 32 bit system. The regular expression engine used the the fwts klog scanner was using a vector of size 1, when the size should be a multiple of 3 ints, so this was causing the pcre regex execution to trash the end of the stack and hence cause this bug.
Actually, I've now figured out the bug and can reproduce it on a 32 bit system. The regular expression engine used the the fwts klog scanner was using a vector of size 1, when the size should be a multiple of 3 ints, so this was causing the pcre regex execution to trash the end of the stack and hence cause this bug.