Also fix trace-summary python backtrace.
Intermittent crash:
8c337bd769
threading/MsgThread: Decouple IO source and thread
A MsgThread acting as an IO source itself can result in the
scenario where the threading manager's heartbeat timer deletes
a terminated MsgThread instance, but at the same time this
instance is in the list of ready IO sources as determined by
the IO loop in the current iteration.
trace-summary backtrace:
https://github.com/zeek/pysubnettree/pull/38
Fix extension for stricter unicode validation
This fixes our extension module for python/cpython#105375 which
made unicode validation stricter.
Reported by: Arne Welzel (crash), ogogon (backtrace)
20f7942a5e