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Add issue header

test_buffer.test_array_alignment() fails on Python 3.15.0~a6 when using mimalloc #11166

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test_buffer.test_array_alignment() fails on Python 3.15.0~a6 when using mimalloc

test_buffer.test_array_alignment() fails on Python 3.15.0~a6 when using mimalloc #11166

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succeeded Feb 11, 2026 in 4s

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