Issue for https://bugs.python.org/issue18748#msg340059.

comment : 

Is there someone interested to debug remaining "Exception ignored:" logs in test_urllib?

test_invalid_redirect (test.test_urllib.urlopen_HttpTests) ...
Exception ignored in: <http.client.HTTPResponse object at 0x7fca52f24be0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 402, in close
    super().close() # set "closed" flag
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 415, in flush
    self.fp.flush()
ValueError: I/O operation on closed file.
ok

test_read_bogus (test.test_urllib.urlopen_HttpTests) ...
Exception ignored in: <http.client.HTTPResponse object at 0x7fca52f24cd0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 402, in close
    super().close() # set "closed" flag
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 415, in flush
    self.fp.flush()
ValueError: I/O operation on closed file.
ok

test_redirect_limit_independent (test.test_urllib.urlopen_HttpTests) ...
Exception ignored in: <http.client.HTTPResponse object at 0x7fca52f24cd0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 402, in close
    super().close() # set "closed" flag
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 415, in flush
    self.fp.flush()
ValueError: I/O operation on closed file.
Exception ignored in: <http.client.HTTPResponse object at 0x7fca52f24c30>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 402, in close
    super().close() # set "closed" flag
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 415, in flush
    self.fp.flush()
ValueError: I/O operation on closed file.
Exception ignored in: <http.client.HTTPResponse object at 0x7fca52f24460>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 402, in close
    super().close() # set "closed" flag
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 415, in flush
    self.fp.flush()
ValueError: I/O operation on closed file.
Exception ignored in: <http.client.HTTPResponse object at 0x7fca52f24a50>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 402, in close
    super().close() # set "closed" flag
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 415, in flush
    self.fp.flush()
ValueError: I/O operation on closed file.
Exception ignored in: <http.client.HTTPResponse object at 0x7fca52f247d0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 402, in close
    super().close() # set "closed" flag
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 415, in flush
    self.fp.flush()
ValueError: I/O operation on closed file.
Exception ignored in: <http.client.HTTPResponse object at 0x7fca52ea95f0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 402, in close
    super().close() # set "closed" flag
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 415, in flush
    self.fp.flush()
ValueError: I/O operation on closed file.
Exception ignored in: <http.client.HTTPResponse object at 0x7fca52ea99b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 402, in close
    super().close() # set "closed" flag
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 415, in flush
    self.fp.flush()
ValueError: I/O operation on closed file.
Exception ignored in: <http.client.HTTPResponse object at 0x7fca52f2f820>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 402, in close
    super().close() # set "closed" flag
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 415, in flush
    self.fp.flush()
ValueError: I/O operation on closed file.
Exception ignored in: <http.client.HTTPResponse object at 0x7fca52f2fbe0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 402, in close
    super().close() # set "closed" flag
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 415, in flush
    self.fp.flush()
ValueError: I/O operation on closed file.
Exception ignored in: <http.client.HTTPResponse object at 0x7fca52f2fd70>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 402, in close
    super().close() # set "closed" flag
  File "/home/vstinner/prog/python/master/Lib/http/client.py", line 415, in flush
    self.fp.flush()
ValueError: I/O operation on closed file.
ok


It's unclear to be if it's a bug in http.client, a bug in the test... or something else.