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33 lines
1.1 KiB
33 lines
1.1 KiB
4 months ago
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This directory contains test cases that are known to leak references.
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The idea is that you can import these modules while in the interpreter
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and call the leak function repeatedly. This will only be helpful if
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the interpreter was built in debug mode. If the total ref count
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doesn't increase, the bug has been fixed and the file should be removed
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from the repository.
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Note: be careful to check for cyclic garbage. Sometimes it may be helpful
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to define the leak function like:
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def leak():
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def inner_leak():
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# this is the function that leaks, but also creates cycles
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inner_leak()
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gc.collect() ; gc.collect() ; gc.collect()
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Here's an example interpreter session for test_gestalt which still leaks:
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>>> from test.leakers.test_gestalt import leak
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[24275 refs]
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>>> leak()
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[28936 refs]
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>>> leak()
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[28938 refs]
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>>> leak()
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[28940 refs]
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>>>
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Once the leak is fixed, the test case should be moved into an appropriate
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test (even if it was originally from the test suite). This ensures the
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regression doesn't happen again. And if it does, it should be easier
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to track down.
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