src/run-pass/task-comm-5.rs occasionally segfaults

[marijnh]

If I run it repeatedly from the command-line, it'll segfault about 1 in 10 times. (This is on Linux.)

[marijnh]

We're also seeing recurring failure of run-fail/spawnfail.rs on the tinderboxes now. Might be a different issue. Someone should look into this.

[brson]

marijnh, have you seen this segfault recently?

[marijnh]

Seems fixed. I just ran it twenty times in a row without getting a segfault.