While looking into #23, I spied the skipped testComm test, and suspected it might be related to some of the issues I've been seeing.

I noticed that there were some ignored errors:

If I remove the skip and run go test -count=100 -run TestReadRecord/Comm, then every ~100 tests or so I see EBADF returning from those, and sometimes I see hangs while one side or the other is waiting for an eventfd which will never get messaged.

The skip: