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bpo-11105: document the new test.support.infinite_recursion context manager (GH-26604)

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Batuhan Taskaya 2021-06-08 20:39:03 +03:00 • committed by GitHub
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8
Lib/test/support/__init__.py
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@ -49,7 +49,7 @@ __all__ = [
# processes # processes
"reap_children", "reap_children",
# miscellaneous # miscellaneous
"run_with_locale", "swap_item", "findfile", "run_with_locale", "swap_item", "findfile", "infinite_recursion",
"swap_attr", "Matcher", "set_memlimit", "SuppressCrashReport", "sortdict", "swap_attr", "Matcher", "set_memlimit", "SuppressCrashReport", "sortdict",
"run_with_tz", "PGO", "missing_compiler_executable", "run_with_tz", "PGO", "missing_compiler_executable",
"ALWAYS_EQ", "NEVER_EQ", "LARGEST", "SMALLEST", "ALWAYS_EQ", "NEVER_EQ", "LARGEST", "SMALLEST",
@ -2002,6 +2002,12 @@ def check_disallow_instantiation(testcase, tp, *args, **kwds):
@contextlib.contextmanager @contextlib.contextmanager
def infinite_recursion(max_depth=75): def infinite_recursion(max_depth=75):
"""Set a lower limit for tests that interact with infinite recursions
(e.g test_ast.ASTHelpers_Test.test_recursion_direct) since on some
debug windows builds, due to not enough functions being inlined the
stack size might not handle the default recursion limit (1000). See
bpo-11105 for details."""
original_depth = sys.getrecursionlimit() original_depth = sys.getrecursionlimit()
try: try:
sys.setrecursionlimit(max_depth) sys.setrecursionlimit(max_depth)