test_gdb failures

[pitrou]

BPO	8600
Nosy	@jcea, @pitrou, @vstinner, @davidmalcolm
Files	ignore-stderr-thread-noise.txt: Patch against trunk to ignore that particular error message ignore-stderr-thread-noise2.txt

^{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 = 'https://github.com/jcea'
closed_at = <Date 2011-03-16.00:26:30.852>
created_at = <Date 2010-05-03.02:00:23.072>
labels = ['type-bug', 'tests']
title = 'test_gdb failures'
updated_at = <Date 2011-03-16.00:41:11.640>
user = 'https://github.com/pitrou'

bugs.python.org fields:

activity = <Date 2011-03-16.00:41:11.640>
actor = 'python-dev'
assignee = 'jcea'
closed = True
closed_date = <Date 2011-03-16.00:26:30.852>
closer = 'jcea'
components = ['Tests']
creation = <Date 2010-05-03.02:00:23.072>
creator = 'pitrou'
dependencies = []
files = ['17192', '17193']
hgrepos = []
issue_num = 8600
keywords = []
message_count = 12.0
messages = ['104810', '104849', '104851', '105066', '131073', '131075', '131076', '131077', '131078', '131079', '131080', '131081']
nosy_count = 5.0
nosy_names = ['jcea', 'pitrou', 'vstinner', 'dmalcolm', 'python-dev']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue8600'
versions = ['Python 3.1', 'Python 2.7', 'Python 3.2', 'Python 3.3']

[pitrou]

All test_gdb tests fail here with both trunk and py3k. The failure is always the same so I'm just quoting one of them below:

======================================================================
FAIL: test_basic_command (test.test_gdb.PyBtTests)
Verify that the "py-bt" command works
----------------------------------------------------------------------

Traceback (most recent call last):
  File "/home/antoine/py3k/__svn__/Lib/test/test_gdb.py", line 604, in test_basic_command
    cmds_after_breakpoint=['py-bt'])
  File "/home/antoine/py3k/__svn__/Lib/test/test_gdb.py", line 126, in get_stack_trace
    self.assertEquals(err, '')
AssertionError: 
- warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.
- warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.
- warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.
- warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.
- warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.

This is with:

GNU gdb (GDB) 7.1-1mdv2010.1 (Mandriva Linux release 2010.1)
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html\>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-mandriva-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/\>.

[davidmalcolm]

Is the message about threads emitted every time you run python under gdb? Does gdb work? If so we should simply filter out the error message.

I'm attaching a patch which strips out that error message from stderr (assuming that I reformatted it for line-lengths correctly).

Does this fix things?

[pitrou]

The patch wasn't exactly good. Here is a working patch. Applying it reveals a couple of different failures, but I will open a separate issue.

[pitrou]

I've committed the patch in r80802 (trunk) and r80803 (py3k).

[jcea]

This issue is still bugging OpenIndiana buildbots. The patch is trivial and painless. I will patch 2.7, 3.1, 3.2 and 3.x in a few minutes.

[jcea]

Uhmm, the test seems to have vanished in 3.x. Uhmmm... Why?.

[python-dev]

New changeset 93053ce76075 by Jesus Cea in branch '2.7':
Close issue bpo-8600: test_gdb failures because innocuous warnings
http://hg.python.org/cpython/rev/93053ce76075

[pitrou]

Uhmm, the test seems to have vanished in 3.x. Uhmmm... Why?.

Which test are you talking about?