Failed running sort-8.16

Hi,

I compiled sort-8.16.c.origin.c (from ChiselBench/benchmark/sort-8.16/merged) in the enclosing directory by running "gcc -O3 -o sort sort-8.16.c.origin.c -lpthread". The compilation was fine. But running sort was problematic. For example, I got segmentation fault for running: echo 'x' > x && ./sort x