I'm not sure of the exact root cause here, but I was trying to test my fix for bug 932349 with a local Linux debug build, and the Mochitest harness just would not detect the hang. After a bunch of fumbling around I found that if I disabled the stackFixerProcess logic things worked. Something in there is making hang detection not work properly. This isn't used on TBPL, but only for local development, so it's not a huge priority, just annoying.
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