[issue46787] ProcessPoolExecutor exception memory leak

Change by Roundup Robot : -- keywords: +patch nosy: +python-dev nosy_count: 1.0 -> 2.0 pull_requests: +29548 stage: -> patch review pull_request: https://github.com/python/cpython/pull/31408 ___ Python tracker _

[issue46787] ProcessPoolExecutor exception memory leak

New submission from Vladimir Vinogradenko : If an exception occurs in ProcessPoolExecutor work item, all the exception frame local variables are not garbage collected (or are garbage collected too lately) because they are referenced by the exception's traceback. Attached file is a test case.