New submission from STINNER Victor <[email protected]>:
Currently, test_gdb fails if gdb logs messages on stderr which are
"unexpected". I don't understand the rationale for that: Python is not supposed
to test gdb. It's only supposed to check that python-gdb.py commands work as
expected: stderr should be ignored.
In the past, I was lazy and just added more and more patterns to ignore on
stderr, but this approach doesn't work in the long term: gdb evolves
frequently, and there are always new messages.
Attached PR modify test_gdb to ignore stderr, except of "PC not saved" pattern
used to skip test_gdb on a special case: bpo-34007.
# bpo34007: Sometimes some versions of the shared libraries that
# are part of the traceback are compiled in optimised mode and the
# Program Counter (PC) is not present, not allowing gdb to walk the
# frames back. When this happens, the Python bindings of gdb raise
# an exception, making the test impossible to succeed.
if "PC not saved" in err:
raise unittest.SkipTest("gdb cannot walk the frame object"
" because the Program Counter is"
" not present")
----------
components: Tests
messages: 346211
nosy: vstinner
priority: normal
severity: normal
status: open
title: test_gdb must not fail on "unexpected" messages written into stderr
versions: Python 2.7, Python 3.7, Python 3.8, Python 3.9
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Python tracker <[email protected]>
<https://bugs.python.org/issue37362>
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