ProcessPoolExecutor swallows falsy Exceptions #132063
Description
Bug report
Bug description:
import sys
import concurrent.futures
class MyException(Exception):
def __bool__(self):
return False
def raiser():
raise MyException("foo")
def main():
with concurrent.futures.ProcessPoolExecutor() as p:
print(p.submit(raiser).result())
if __name__ == "__main__":
sys.exit(main())This program prints None, but should fail and print a traceback
CPython versions tested on:
CPython main branch, 3.14, 3.13, 3.12, 3.11, 3.10, 3.9
Operating systems tested on:
Linux