"AttributeError: 'long' object has no attribute 'encode'" after updating to 3.3.0

[edmorley]

Hi!

Our PR updating us from pytest 3.2.5 to 3.3.0 (mozilla/treeherder#2993) is failing, with:

...
INTERNALERROR>   File "/home/travis/venv/lib/python2.7/site-packages/_pytest/warnings.py", line 94, in pytest_runtest_protocol
INTERNALERROR>     yield
INTERNALERROR>   File "/opt/python/2.7.14/lib/python2.7/contextlib.py", line 24, in __exit__
INTERNALERROR>     self.gen.next()
INTERNALERROR>   File "/home/travis/venv/lib/python2.7/site-packages/_pytest/warnings.py", line 75, in catch_warnings_for_item
INTERNALERROR>     new_args = [compat.ascii_escaped(m) for m in warn_msg.args]
INTERNALERROR>   File "/home/travis/venv/lib/python2.7/site-packages/_pytest/compat.py", line 187, in ascii_escaped
INTERNALERROR>     return val.encode('unicode-escape')
INTERNALERROR> AttributeError: 'long' object has no attribute 'encode'

(Full log: https://travis-ci.org/mozilla/treeherder/jobs/308166122#L706)

This is using:

• Ubuntu 14.04
• Python 2.7.14
• pytest 3.3.0
• pluggy 0.6.0
• pytest-selenium 1.11.2
• pytest-django 3.1.2
• pytest-html 1.16.0
• pytest-metadata 1.5.0
• pytest-variables 1.7.0
• pytest-base-url 1.4.1

Is this a possible regression from #2810?

[nicoddemus]

Thanks @edmorley for writing!

Hmm that's strange, it seems one of the arguments of the warning objects is a long object.

[nicoddemus]

Here's a reproducer:

import warnings

import pytest


@pytest.mark.filterwarnings('always')
def test():
    warnings.warn(UserWarning(1, u'foo'))

[nicoddemus]

Opened #2958 with a fix. 👍

[edmorley]

Many thanks for looking into this!

It's a bit late now, but in case you were curious, the warnings that must be triggering this are these:
https://travis-ci.org/mozilla/treeherder/jobs/308178684#L678