A problem I've been having lately when running Sage's test suite on
Cygwin (i.e. sage -t -a).

Several of the tests that use Maxima are spinning up Maxima processes
(I guess interacted with via pexpect?) and not killing them.  And
what's worse, is that each one seems to sit in a busy wait.  So even
once the test suite has long since moved on to other tests I'm left
with dozens of maxima processes chewing up my CPU for nothing.  I can
kill them manually and it doesn't seem to break any tests.

But in the meantime, can anyone point me in the right direction to
look for what might be causing this?  It seems to only be maxima
that's the problem.  Other pexpect interfaces don't leave processes
running (much less eating up CPU).

Thanks,
Erik

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