Bare raise inside thread causes segfault

crashy_thread.py

import threading
import time
import logging

logging.basicConfig()
log = logging.Logger(__name__)


class CrashyThread(threading.Thread):
    def run(self):
        try:
            log.warning("hello from crashy thread {}")
            raise
        except Exception:
            log.warning("hello")
            return


def main():
    t = CrashyThread()
    t.daemon = True
    t.start()
    time.sleep(10)
    log.warning("hello from main thread")


if __name__ == "__main__":
    main()

$ python test.py
hello from crashy thread {}
[1]    2399 segmentation fault  python test.py

vs

cat test.py | sed 's/raise/raise RuntimeError/' | python
hello from crashy thread {}
hello
hello from main thread

@joshp123 this was Python v3.6.4 only?

Some specific version of python (3.4.x?) I think. It was fixed in later versions.