ddvento, I'm afraid you'll have to diagnose a bit more by tracing what happens during test_sendall_interrupted and test_sendall_interrupted_with_timeout. These test cases have a legitimate use for arming an alarm signal, but for some reason it seems the signal is triggered after those tests finish. Try printing exactly what happens at each step in those tests.

Etienne, I'm not sure what the issue specifically is. Is Linux TIPC has a memory leak issue, it isn't really Python's problem. If any case, it is a separate issue and therefore should be discussed on a separate bug entry.