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Bug 1787902 - pytest fails to build with Python 3.9
Summary: pytest fails to build with Python 3.9
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Fedora
Classification: Fedora
Component: pytest
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Miro Hrončok
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: PYTHON39
TreeView+ depends on / blocked
 
Reported: 2020-01-05 10:37 UTC by Miro Hrončok
Modified: 2020-02-10 14:21 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-02-10 14:21:07 UTC
Type: Bug
Embargoed:

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System ID Private Priority Status Summary Last Updated
Github pytest-dev pytest issues 6404 0 None closed Python 3.9: DeprecationWarning: The parser module 2020-02-10 14:12:09 UTC

Description Miro Hrončok 2020-01-05 10:37:58 UTC 
pytest fails to build with Python 3.9.0a2.

_______________________________ test_isparseable _______________________________

    def test_isparseable():
>       assert Source("hello").isparseable()

/builddir/build/BUILD/pytest-4.6.8/testing/code/test_source.py:130: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <_pytest._code.source.Source object at 0x7f25d53afaf0>, deindent = True

    def isparseable(self, deindent=True):
        """ return True if source is parseable, heuristically
            deindenting it by default.
        """
>       from parser import suite as syntax_checker
E       DeprecationWarning: The parser module is deprecated and will be removed in future versions of Python

/builddir/build/BUILDROOT/pytest-4.6.8-1.fc32.x86_64/usr/lib/python3.9/site-packages/_pytest/_code/source.py:126: DeprecationWarning
__________________________ TestAccesses.test_getrange __________________________

self = <test_source.TestAccesses object at 0x7f25d5c02670>

    def test_getrange(self):
        x = self.source[0:2]
>       assert x.isparseable()

/builddir/build/BUILD/pytest-4.6.8/testing/code/test_source.py:150: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <_pytest._code.source.Source object at 0x7f25d59a7190>, deindent = True

    def isparseable(self, deindent=True):
        """ return True if source is parseable, heuristically
            deindenting it by default.
        """
>       from parser import suite as syntax_checker
E       DeprecationWarning: The parser module is deprecated and will be removed in future versions of Python

/builddir/build/BUILDROOT/pytest-4.6.8-1.fc32.x86_64/usr/lib/python3.9/site-packages/_pytest/_code/source.py:126: DeprecationWarning

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.9/fedora-rawhide-x86_64/01138614-pytest/

For all our attempts to build pytest with Python 3.9, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.9/package/pytest/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.9:
https://copr.fedorainfracloud.org/coprs/g/python/python3.9/

Let us know here if you have any questions.

Python 3.9 will be included in Fedora 33, but the initial bootstrapping has already started.
A build failure this early in the bootstrap sequence blocks us very much.
Comment 1 Miro Hrončok 2020-01-05 11:50:01 UTC 
pytest 5 has the same problem.

this patch workarounds it before the upstream fix:

--- a/tox.ini
+++ b/tox.ini
@@ -168,6 +168,8 @@ filterwarnings =
     default:invalid escape sequence:DeprecationWarning
     # ignore use of unregistered marks, because we use many to test the implementation
     ignore::_pytest.warning_types.PytestUnknownMarkWarning
+    # https://github.com/pytest-dev/pytest/issues/6404
+    ignore:.*The parser module is deprecated.*:DeprecationWarning
 pytester_example_dir = testing/example_scripts
 markers =
     # dummy markers for testing
Comment 2 Miro Hrončok 2020-02-10 14:21:07 UTC 
I've backported the upstream fix from https://github.com/pytest-dev/pytest/commit/f606fef19d035719be6ed862f7f426a0e7c582e1
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