[Python-Dev] Trying to build from source, test-poplib fails

[Antoine Pitrou]

On Sat, 7 Apr 2018 17:31:47 -0500
Skip Montanaro <skip.montanaro at gmail.com> wrote:
> It's been a long while since I rebuilt Python from the Git source. I
> tried for the first time the other day. Everything passed except
> test_poplib and test_asyncio. The former just runs and runs and runs.
> Here's the first traceback I encounter when executing ./python
> Lib/test/test_poplib.py:
> 
> test_stls_context (__main__.TestPOP3Class) ... Exception in thread Thread-16:
> Traceback (most recent call last):
>   File "/home/skip/src/python/cpython/Lib/threading.py", line 917, in
> _bootstrap_inner
>     self.run()
>   File "Lib/test/test_poplib.py", line 227, in run
>     asyncore.loop(timeout=0.1, count=1)
>   File "/home/skip/src/python/cpython/Lib/asyncore.py", line 207, in loop
>     poll_fun(timeout, map)
>   File "/home/skip/src/python/cpython/Lib/asyncore.py", line 150, in poll
>     read(obj)
>   File "/home/skip/src/python/cpython/Lib/asyncore.py", line 87, in read
>     obj.handle_error()
>   File "/home/skip/src/python/cpython/Lib/asyncore.py", line 83, in read
>     obj.handle_read_event()
>   File "/home/skip/src/python/cpython/Lib/asyncore.py", line 422, in
> handle_read_event
>     self.handle_read()
>   File "Lib/test/test_poplib.py", line 194, in handle_read
>     self._do_tls_handshake()
>   File "Lib/test/test_poplib.py", line 174, in _do_tls_handshake
>     self.socket.do_handshake()
>   File "/home/skip/src/python/cpython/Lib/ssl.py", line 1108, in do_handshake
>     self._sslobj.do_handshake()
> ssl.SSLError: [SSL: SSLV3_ALERT_CERTIFICATE_UNKNOWN] sslv3 alert
> certificate unknown (_ssl.c:1049)
[...]

I get the same issues too, and this has been happening for quite some
time.  The tests and/or poplib itself may be written in a fragile way.

Regards

Antoine.