This could have been in the underlying sgminer, but I was able to replicate a bug.

Segmentation Fault (hard process stop)
Debian Wheezy

This occurs when you attempt to start sgminer with pool-gpu-threads > 1, if there is not already a valid .bin for cklovias.cl

Fix: Start sgminer with pool-gpu-threads at 1 and allow the .bin files to be built, then restart with 2.


Discovered after cleaning up .bin files having tuned to gpu-threads 2 on scrypt-n

Edit: this is happening for each kernel in succession when i disable a pool, with other settings besides gpu-threads, such as intensity