SIGBUS error on mips64el architecture about zopfli HOT 2 OPEN

> while (scan < safe_end && *((size_t*)scan) == *((size_t*)match)) {

If scan is not integer aligned, then that will cause unaligned accesses. In 
x86, this is a performance problem. In other architectures, it results in a 
SIGBUS like you are seeing.

It seems to me that there should be a bit of code before the while loop that 
advances scan up to the next alignment boundary, like you find in optimized 
memcmp implementations. Once scan is aligned, then the optimized loops (for 8 
and 4 bytes) can be used.