| @@ -65,6 +65,26 @@ def test_trashcan(self): |
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del root |
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support.gc_collect() |
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+def test_parser_ref_cycle(self): |
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+# bpo-31499: xmlparser_dealloc() crashed with a segmentation fault when |
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+# xmlparser_gc_clear() was called previously by the garbage collector, |
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+# when the parser was part of a reference cycle. |
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+ |
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+def parser_ref_cycle(): |
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+parser = cET.XMLParser() |
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+# Create a reference cycle using an exception to keep the frame |
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+# alive, so the parser will be destroyed by the garbage collector |
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+try: |
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+raise ValueError |
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+except ValueError as exc: |
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+err = exc |
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+ |
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+# Create a parser part of reference cycle |
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+parser_ref_cycle() |
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+# Trigger an explicit garbage collection to break the reference cycle |
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+# and so destroy the parser |
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+support.gc_collect() |
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+ |
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@unittest.skipUnless(cET, 'requires _elementtree') |
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class TestAliasWorking(unittest.TestCase): |