The x86 gentoo 3.0 and 3.x buildbots have been failing for a while at the test stage, with:

make: *** [buildbottest] Unknown signal 32
program finished with exit code 2

I noticed a common denominator with these failures, which is that they always seem to occur a few tests after 
test_os has been run.  So it looks as though something in test_os is causing this.

Can anyone reproduce this (I can't on any of the machines I have access to), and (e.g., by trial and error) identify 
which of the test_os tests is causing this?