[New-bugs-announce] [issue9317] Incorrect coverage file from trace test_pickle.py

[Alexander Belopolsky]

New submission from Alexander Belopolsky <belopolsky at users.sourceforge.net>:

I am running the following command

$ python -m trace -C pickle-trace.d -c -m Lib/test/test_pickle.py

and getting attached file, pickle.cover, in the pickle-trace.d directory.  This does not look right.  From the very beginning, module level statements are marked as not executed:


>>>>>> __version__ = "$Revision: 82937 $"       # Code version
       
>>>>>> from types import FunctionType, BuiltinFunctionType
>>>>>> from copyreg import dispatch_table
>>>>>> from copyreg import _extension_registry, _inverted_registry, _extension_cache
>>>>>> import marshal
>>>>>> import sys

The method I was interested in, _instantiate, shows as if it was never executed even though if I add a failing assert, I do see test failure.

I suspect that this may have something to do with the import trickery that test_pickle does to test with and without _pickle.

----------
components: Library (Lib)
files: pickle.cover
messages: 110990
nosy: belopolsky
priority: normal
severity: normal
stage: unit test needed
status: open
title: Incorrect coverage file from trace test_pickle.py
type: behavior
versions: Python 3.2
Added file: http://bugs.python.org/file18096/pickle.cover

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<http://bugs.python.org/issue9317>
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