test_gdb started to fail on buildbot/s390x RHEL7

[sobolevn]

BPO	46834
Nosy	@vstinner, @sobolevn

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2022-02-23.12:09:45.107>
labels = ['type-bug', 'tests', '3.11']
title = 'test_gdb started to fail on buildbot/s390x RHEL7'
updated_at = <Date 2022-02-23.12:11:59.689>
user = 'https://github.com/sobolevn'

bugs.python.org fields:

activity = <Date 2022-02-23.12:11:59.689>
actor = 'sobolevn'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Tests']
creation = <Date 2022-02-23.12:09:45.107>
creator = 'sobolevn'
dependencies = []
files = []
hgrepos = []
issue_num = 46834
keywords = []
message_count = 2.0
messages = ['413786', '413787']
nosy_count = 2.0
nosy_names = ['vstinner', 'sobolevn']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue46834'
versions = ['Python 3.11']

[sobolevn]

Log sample:

======================================================================
FAIL: test_up_then_down (test.test_gdb.StackNavigationTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-rhel-z/build/Lib/test/test_gdb.py", line 782, in test_up_then_down
    self.assertMultilineMatches(bt,
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-rhel-z/build/Lib/test/test_gdb.py", line 297, in assertMultilineMatches
    self.fail(msg='%r did not match %r' % (actual, pattern))
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 'Breakpoint 1 at 0x801ff160: file Python/bltinmodule.c, line 1168.\n[Thread debugging using libthread_db enabled]\nUsing host libthread_db library "/lib64/libthread_db.so.1".\n\nBreakpoint 1, builtin_id (self=, v=<_PyRuntime+2184>) at Python/bltinmodule.c:1168\n1168\t{\n#16 Frame 0x3fffdfb1118, for file <string>, line 9, in bar (a=1, b=2, c=3)\n#16 Frame 0x3fffdfb1090, for file <string>, line 6, in foo (a=1, b=2, c=3)\n#16 Frame 0x3fffdfb1020, for file <string>, line 14, in <module> ()\nUnable to find an older python frame\n#4 Frame 0x3fffdfb11a8, for file <string>, line 12, in baz (args=(1, 2, 3))\n' did not match '^.*\n#[0-9]+ Frame 0x-?[0-9a-f]+, for file <string>, line 12, in baz \\(args=\\(1, 2, 3\\)\\)\n#[0-9]+ <built-in method pyobject_fastcall of module object at remote 0x[0-9a-f]+>\n#[0-9]+ Frame 0x-?[0-9a-f]+, for file <string>, line 12, in baz \\(args=\\(1, 2, 3\\)\\)\n$'
----------------------------------------------------------------------
Ran 32 tests in 15.312s
FAILED (failures=53)
test test_gdb failed
1 test failed again:
    test_gdb

Full log (too long): https://buildbot.python.org/all/#/builders/179/builds/1769/steps/5/logs/stdio

It started to happen (at least more often - however, I cannot find any older failures at the moment) after this commit: b899126

Build link: https://buildbot.python.org/all/#/builders/402/builds/1744

Latest commits (at this moment):

• Fails: 375a56b
• Passes: 424023e
• Fails: 288af84

[sobolevn]

Sorry, wrong link. It started to fail after this commit: 66b3cd7

[kumaraditya303]

Closing as CI is green.