New submission from Miro Hrončok <m...@hroncok.cz>:
We had this weird traceback when running pythoninfo in Fedora build with Python
3.9.0a6:
+ /builddir/build/BUILD/Python-3.9.0a6/build/optimized/python -m test.pythoninfo
ERROR: collect_gdb() failed
Traceback (most recent call last):
File "/builddir/build/BUILD/Python-3.9.0a6/Lib/test/pythoninfo.py", line 761,
in collect_info
collect_func(info_add)
File "/builddir/build/BUILD/Python-3.9.0a6/Lib/test/pythoninfo.py", line 383,
in collect_gdb
version = version.splitlines()[0]
IndexError: list index out of range
I have debugged the problem and it is:
>>> subprocess.run(["gdb", "-nx", "--version"])
CompletedProcess(args=['gdb', '-nx', '--version'], returncode=-11)
There is a segfault. Possibly because gdb was linked to libpython from 3.9.0a5
and we run it trough subprocess from 3.9.0a6.
The code in pythoninfo is:
try:
proc = subprocess.Popen(["gdb", "-nx", "--version"],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
universal_newlines=True)
version = proc.communicate()[0]
except OSError:
return
That means it is designed to ignore errors. But it only ignores some errors.
Should it only attempt to parse the version when proc.returncode is 0?
I don't know yet if the tests will fail as well, maybe the problem will be
bigger.
----------
components: Tests
messages: 367641
nosy: hroncok, vstinner
priority: normal
severity: normal
status: open
title: pythoninfo collect_gdb() blows up when gdb fails to run
versions: Python 3.7, Python 3.8, Python 3.9
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue40436>
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