[New-bugs-announce] [issue42587] test_buffer fails on Python built with GCC 11

[STINNER Victor]

New submission from STINNER Victor <vstinner at python.org>:

PPC64LE Fedora Rawhide LTO 3.x:
https://buildbot.python.org/all/#/builders/448/builds/433

FAIL: test_memoryview_cast (test.test_buffer.TestBufferProtocol)
FAIL: test_memoryview_cast_1D_ND (test.test_buffer.TestBufferProtocol)
FAIL: test_memoryview_compare_random_formats (test.test_buffer.TestBufferProtocol)
FAIL: test_ndarray_format_shape (test.test_buffer.TestBufferProtocol)
FAIL: test_ndarray_format_strides (test.test_buffer.TestBufferProtocol)
FAIL: test_ndarray_getbuf (test.test_buffer.TestBufferProtocol)
FAIL: test_ndarray_index_getitem_single (test.test_buffer.TestBufferProtocol)
FAIL: test_ndarray_random (test.test_buffer.TestBufferProtocol)
FAIL: test_ndarray_slice_assign_single (test.test_buffer.TestBufferProtocol)

Example:

FAIL: test_ndarray_slice_assign_single (test.test_buffer.TestBufferProtocol)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-fedora-rawhide-ppc64le.lto/build/Lib/test/test_buffer.py", line 1836, in test_ndarray_slice_assign_single
    self.assertEqual(mv, nd)
AssertionError: <memory at 0x7fff80e51dc0> != <ndarray object at 0x7fff80c35030>

----------
components: Tests
messages: 382643
nosy: vstinner
priority: normal
severity: normal
status: open
title: test_buffer fails on Python built with GCC 11
versions: Python 3.10, Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42587>
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