It was reported a while ago that using sin with -n would make it core dump.  Today I started updating our custom image 
with the latest 6.4 to start testing it on our target hardware.  I was a bit surprise to see that M6 doesn't contain an 
updated sin.  

Note that I didn't try it yet, maybe the bug was in libc or some other component but i though I would let you guys knows
.