Nikolaus Rath <nikol...@rath.org> writes:
> Chris Angelico <ros...@gmail.com> writes:
>> On Wed, Jun 4, 2014 at 12:30 PM, Nikolaus Rath <nikol...@rath.org> wrote:
>>> I've instrumented one of my unit tests with a conditional
>>> 'pdb.set_trace' in some circumstances (specifically, when a function is
>>> called by a thread other than MainThread).
>>
>> I think the likelihood of this being an issue with interactive
>> debugging and threads is sufficiently high that you should avoid
>> putting the two together, at least until you can verify that the same
>> problem occurs without that combination.
>
> Here's stacktrace as obtained by traceback.print_stack():
>
> tests/t1_backends.py:563: test_extra_data[mock_s3c-zlib] PASSED
> tests/t1_backends.py:563: test_extra_data[mock_s3c-bzip2] PASSED
>
> ======================== 87 tests deselected by '-kextra'
> =========================
> =============== 5 passed, 1 skipped, 87 deselected in 0.65 seconds
> ================
> File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/common.py", line
> 853, in close
> self.fh.close()
> File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/s3c.py", line 691,
> in close
> traceback.print_stack(file=sys.stdout)
> something is wrong
> File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/common.py", line
> 853, in close
> self.fh.close()
> File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/s3c.py", line 691,
> in close
> traceback.print_stack(file=sys.stdout)
> something is wrong
> File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/common.py", line
> 1050, in close
> self.fh.close()
> File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/s3c.py", line 691,
> in close
> traceback.print_stack(file=sys.stdout)
>
> Still no context before the ominous close() call. I'm very confused.
It get's even funnier if I just repeat this exercise (without changing
code). Here are some more "tracebacks" that I got:
File "/usr/bin/py.test-3", line 5, in <module>
sys.exit(load_entry_point('pytest==2.5.2', 'console_scripts', 'py.test')())
[...]
File "/usr/lib/python3/dist-packages/py/_code/code.py", line 524, in
repr_traceback_entry
source = self._getentrysource(entry)
File "/usr/lib/python3/dist-packages/py/_code/code.py", line 450, in
_getentrysource
source = entry.getsource(self.astcache)
File "/usr/lib/python3/dist-packages/py/_code/code.py", line 199, in getsource
astnode=astnode)
File "/usr/lib/python3/dist-packages/py/_code/source.py", line 367, in
getstatementrange_ast
astnode = compile(content, "source", "exec", 1024) # 1024 for AST
File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/common.py", line
1050, in close
self.fh.close_real()
File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/s3c.py", line 702, in
close_real
traceback.print_stack(file=sys.stdout)
or also
File "/usr/bin/py.test-3", line 5, in <module>
sys.exit(load_entry_point('pytest==2.5.2', 'console_scripts', 'py.test')())
[...]
File "/usr/lib/python3.4/logging/__init__.py", line 1474, in callHandlers
hdlr.handle(record)
File "/usr/lib/python3.4/logging/__init__.py", line 842, in handle
rv = self.filter(record)
File "/usr/lib/python3.4/logging/__init__.py", line 699, in filter
for f in self.filters:
File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/common.py", line 853,
in close
self.fh.close()
File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/common.py", line
1050, in close
self.fh.close_real()
File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/s3c.py", line 702, in
close_real
traceback.print_stack(file=sys.stdout)
and this one looks actually the way I would expect:
[...]
File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/common.py", line 335,
in fetch
return self.perform_read(do_read, key)
File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/common.py", line 58,
in wrapped
return method(*a, **kw)
File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/common.py", line 309,
in perform_read
return fn(fh)
File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/common.py", line 859,
in __exit__
self.close()
File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/common.py", line 853,
in close
self.fh.close()
File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/common.py", line
1050, in close
self.fh.close_real()
File "/home/nikratio/in-progress/s3ql/src/s3ql/backends/s3c.py", line 702, in
close_real
traceback.print_stack(file=sys.stdout)
I am not using any C extension modules, but I guess I nevertheless have
to assume that something seriously messed up either the stack or the
traceback printing routines?
Best,
Nikolaus
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