BUG: Fix reference count leak in str(scalar). #24211
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PyArray_DescrFromTypeObject() returns a fresh reference to the descriptor object, which must be freed. This leak was introduced in numpy@670842b
charris
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Jul 26, 2023
In numpygh-22449 `descr` was renamed `dtype`, which broke the build as numpygh-24211 decrefed the old variable to fix a reference leak. This bug slipped in because numpygh-22449 was not retested after the merge.
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PyArray_DescrFromTypeObject() returns a fresh reference to the descriptor object, which must be freed.
This leak was introduced in
670842b
The leak was released in NumPy 1.25, so this change may be a 1.25 backport candidate.
Bug found while running the Google Protobuf test suite under NumPy 1.25, which stringifies NumPy arrays in some of its tests, and has a test harness for detecting reference count leaks: https://github.com/protocolbuffers/protobuf/blob/49d3bca39f96f7709d48aaea4f5d30c11a943690/python/google/protobuf/internal/testing_refleaks.py