If it didn't cleanly compile and run on linux, it was a autofail. I found a discrepancy in MPICH2 the hard way: it would correctly implement my leader election

If it didn't cleanly compile and run on linux, it was a autofail. I found a discrepancy in MPICH2 the hard way: it would correctly implement my leader election on my mac, and on my little raspberry pi, but not on a Solaris linux! Lost 5% of my grade to that bug.