[issue42587] test_buffer fails on Python built with GCC 11

[STINNER Victor]

STINNER Victor  added the comment:

See also: Behavior of struct “?” format (native _Bool)
https://discuss.python.org/t/behavior-of-struct-format-native-bool/3774

--

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue42587] test_buffer fails on Python built with GCC 11

[STINNER Victor]

STINNER Victor  added the comment:

> FAIL: test_memoryview_cast (test.test_buffer.TestBufferProtocol)

On AArch64, GCC 11 miscompiles unpack_cmp() of Objects/memoryview.c for the '?' 
case:

/* boolean */
case '?': CMP_SINGLE(p, q, _Bool); return equal;

I reported the bug to GCC upstream: 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98190

--

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue42587] test_buffer fails on Python built with GCC 11

[STINNER Victor]

STINNER Victor  added the comment:

> FAIL: test_memoryview_cast (test.test_buffer.TestBufferProtocol)

It might be related to _Bool. See also bpo-39689.

--

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue42587] test_buffer fails on Python built with GCC 11

[STINNER Victor]

STINNER Victor  added the comment:

test_buffer also fails with GCC 11 on Python 3.8 built without LTO nor PGO, 
just -Og (./configure --enable-pydebug).

PPC64LE Fedora Rawhide Refleaks 3.8:
https://buildbot.python.org/all/#/builders/398/builds/101

test.pythoninfo:

sysconfig[CFLAGS]: -Wno-unused-result -Wsign-compare -g -Og -Wall

sysconfig[PY_CFLAGS]: -Wno-unused-result -Wsign-compare -g -Og -Wall

sysconfig[PY_CFLAGS_NODIST]: -std=c99 -Wextra -Wno-unused-result 
-Wno-unused-parameter -Wno-missing-field-initializers 
-Werror=implicit-function-declaration -I./Include/internal

sysconfig[PY_STDMODULE_CFLAGS]: -Wno-unused-result -Wsign-compare -g -Og -Wall 
-std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter 
-Wno-missing-field-initializers -Werror=implicit-function-declaration 
-I./Include/internal -I. -I./Include

Note: I'm not sure why test.pythoninfo didn't log LDFLAGS? It's supposed to log 
them.

--

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue42587] test_buffer fails on Python built with GCC 11

[STINNER Victor]

STINNER Victor  added the comment:

Copy of Miro Hrončok's email to Fedora python-devel list:

https://lists.fedoraproject.org/archives/list/python-de...@lists.fedoraproject.org/thread/ADKCB6HXGZHJPYX5LSJ7422FITYSOAL3/


Hello.

I've been notified that many of the Python interpreters started to fail with 
new 
GNU Toolchain (gcc 11, glibc 2.33).

https://koschei.fedoraproject.org/package/pythonX.Y (replace X.Y with version)

Python 3.5
  - test_buffer fails on aarch64
  - test_buffer+test_dbm_gnu fails on ppc64le
  - %check segafults on x86_64

Python 3.6
  - %check segafults on x86_64
  - test_buffer fails on aarch64

Python 3.7
  - test_buffer fails on aarch64+ppc64le

Python 3.8
  - seems to build fine

Python 3.9
  - test_buffer fails on aarch64+ppc64le

Python 3.10
  - seems to build fine

PyPys have not yet been collected by Koschei, Python 2.7 seems fine.



Python is built with LTO+PGO on Fedora.

--

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue42587] test_buffer fails on Python built with GCC 11

[STINNER Victor]

STINNER Victor  added the comment:

On Python 3.6/x86-64, Python does crash in libregrtest while loading test_code:

0:01:13 load avg: 2.23 [ 56/406] test_code

Fatal Python error: Segmentation fault
Current thread 0x7f5a6864d740 (most recent call first):
  File "/builddir/build/BUILD/Python-3.6.12/Lib/test/test_code.py", line 288 in 

  File "", line 219 in _call_with_frames_removed
  File "", line 678 in exec_module
  File "", line 665 in _load_unlocked
  File "", line 955 in _find_and_load_unlocked
  File "", line 971 in _find_and_load
  File "", line 994 in _gcd_import
  File "/builddir/build/BUILD/Python-3.6.12/Lib/importlib/__init__.py", line 
126 in import_module
  (...)

On Python 3.5/x86-64, test_ctypes.test_callbacks() crashs with a SIGSEGV:

test_callbacks (ctypes.test.test_as_parameter.AsParamPropertyWrapperTestCase) 
...

Fatal Python error: Segmentation fault
Current thread 0x7f5de8322740 (most recent call first):
  File 
"/builddir/build/BUILD/Python-3.5.10/Lib/ctypes/test/test_as_parameter.py", 
line 90 in test_callbacks

The strange part is that the test suite pass on some platforms depending on the 
Python version.

It might be a GCC 11 regression.

--

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue42587] test_buffer fails on Python built with GCC 11

[STINNER Victor]

New submission from STINNER Victor :

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:  != 

--
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

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com