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bpo-46542: test_lib2to3 uses support.infinite_recursion() (GH-31035)

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* bpo-46542: test_lib2to3 uses support.infinite_recursion()

Fix a Python crash in test_lib2to3 when using Python built in debug
mode: limit the recursion limit.

The test_all_project_files() test of test_lib2to3 now uses the
test.support.infinite_recursion() context manager when processing the
infinite_recursion.py file to prevent a crash when Python is built in
debug mode.

The two test_all_project_files() tests now use subTest() and log the
refactored/parsed filename (if test_lib2to3 is run in verbose mode).

* Update Lib/lib2to3/tests/data/infinite_recursion.py

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
This commit is contained in:
Victor Stinner 2022-01-31 18:46:09 +01:00 • committed by GitHub
parent 768569325a
commit ee0ac328d3
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5 changed files with 47 additions and 23 deletions
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4
Lib/lib2to3/pytree.py
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@ -720,8 +720,8 @@ class WildcardPattern(BasePattern):
r[self.name] = nodes[:count]
yield count, r
except RuntimeError:
# We fall back to the iterative pattern matching scheme if the recursive
# scheme hits the recursion limit.
# Fall back to the iterative pattern matching scheme if the
# recursive scheme hits the recursion limit (RecursionError).
for count, r in self._iterative_matches(nodes):
if self.name:
r[self.name] = nodes[:count]