I have the following test script:
import asyncio
import tempfile
@asyncio.coroutine
def error():
raise KeyboardInterrupt()
@asyncio.coroutine
def main():
with tempfile.TemporaryDirectory():
yield from asyncio.gather(error()) # gather() is important here
loop = asyncio.get_event_loop()
loop.run_until_complete(main())
When I run that, I get several tracebacks in a row, and one of them is
inexplicable to me:
Exception ignored in: <generator object main at 0x7fccf7a48ee8>
Traceback (most recent call last):
File "test.py", line 11, in main
File "/usr/lib/python3.4/tempfile.py", line 691, in __exit__
File "/usr/lib/python3.4/tempfile.py", line 697, in cleanup
File "/usr/lib/python3.4/shutil.py", line 454, in rmtree
File "/usr/lib/python3.4/shutil.py", line 452, in rmtree
FileNotFoundError: [Errno 2] No such file or directory: '/tmp/tmpl2z0vwdy'
When the TemporaryDirectory context manager exits, it tries to clean up the
directory it created. In this case, something appears to have already
deleted that directory. There's no other rmdir() or anything like that in
the script, so I'm confused. This part of the traceback goes away if I
remove the gather() in there and instead yield directly from my error()
coro. This also doesn't repro if I throw a RuntimeError instead of a
KeyboardInterrupt.
Could gather() be removing a directory? Or maybe making my context manager
exit twice?
