I'm trying to figure out what is going on with this trace using the
latest mpatrol... 1.5.1

ERROR: [ILLMEM]: illegal memory access at address 0xB4C9B4C4
0xB4C9B4C4 not in heap

call stack
0xB7C861CE __mp_getalloc+190
0xB7C887E2 __mp_getmemory+242
0xB7C9A5F5 __mp_alloc+421
0xB7C9CACD malloc+93
0xB7E5265C _ZN5boost6detail25get_once_per_thread_epochEv+92

here is the code, it is only trying to allocate 4 bytes...

boost::uintmax_t& get_once_per_thread_epoch()
{

BOOST_VERIFY(!pthread_once(&epoch_tss_key_flag,create_epoch_tss_key));
void* data=pthread_getspecific(epoch_tss_key);
if(!data)
{
data=malloc(sizeof(boost::uintmax_t));
BOOST_VERIFY(!pthread_setspecific(epoch_tss_key,data));
*static_cast<boost::uintmax_t*>(data)=UINTMAX_C(~0);
}
return *static_cast<boost::uintmax_t*>(data);
}