New submission from Wüstengecko :
Since Python 3.9, calling `smtplib.LMTP.connect()` without explicitly
specifying any `timeout=` raises a `TypeError`. Specifying `None` or any
integer value works correctly.
```
>>> import smtplib
>>> smtplib.LMTP("/tmp/lmtp.sock")
Traceback (most recent call last):
File "", line 1, in
File "/usr/lib/python3.9/smtplib.py", line 1071, in __init__
super().__init__(host, port, local_hostname=local_hostname,
File "/usr/lib/python3.9/smtplib.py", line 253, in __init__
(code, msg) = self.connect(host, port)
File "/usr/lib/python3.9/smtplib.py", line 1085, in connect
self.sock.settimeout(self.timeout)
TypeError: an integer is required (got type object)
>>> l = smtplib.LMTP()
>>> l.connect("/tmp/lmtp.sock")
Traceback (most recent call last):
File "", line 1, in
File "/usr/lib/python3.9/smtplib.py", line 1085, in connect
self.sock.settimeout(self.timeout)
TypeError: an integer is required (got type object)
```
Upon investigation with `pdb`, the default object for the `timeout` parameter
(`socket._GLOBAL_DEFAULT_TIMEOUT`) is passed through to the
`self.sock.settimeout` call, instead of being handled as "no timeout
specified". The relevant changes were introduced as fix for bpo-39329.
--
components: Library (Lib)
messages: 383850
nosy: wuestengecko
priority: normal
severity: normal
status: open
title: smtplib.LMTP.connect() raises TypeError if `timeout` is not specified
type: crash
versions: Python 3.9
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<https://bugs.python.org/issue42756>
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