FreeBSD x86_64 test failures

[dhuseby]

After the new snapshots landed, test failures showed up.

[dhuseby]

failures:
[run-pass] run-pass/out-of-stack.rs

[sanxiyn]

What is the current status of out-of-stack test?

[asomers]

@sanxiyn I fixed the out-of-stack test in abc3777 , but at some point it regressed again.