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__test__ = False
if __name__ == '__main__':
import eventlet
eventlet.monkey_patch()
import subprocess
import gc
p = subprocess.Popen(['ls'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
# the following line creates a _SocketDuckForFd(3) and .close()s it, but the
# object has not been collected by the GC yet
p.communicate()
f = open('/dev/null', 'rb') # f.fileno() == 3
gc.collect() # this calls the __del__ of _SocketDuckForFd(3), close()ing it again
f.close() # OSError, because the fd 3 has already been closed
print('pass')
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