[Python-bugs-list] [ python-Bugs-485152 ] memory leak in test_scope

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Bugs item #485152, was opened at 2001-11-24 11:45
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Category: Python Interpreter Core
Group: Python 2.2
Status: Open
Resolution: None
Priority: 5
Submitted By: Neal Norwitz (nnorwitz)
Assigned to: Jeremy Hylton (jhylton)
Summary: memory leak in test_scope

Initial Comment:
test_scope leaks memory
see attached file for details

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>Comment By: Jeremy Hylton (jhylton)
Date: 2001-12-06 07:14

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This one is strange!

I've attached a new file (smaller.py) that reproduces the
leak more quickly than test_scope.py.  I've been unable to
simplify further.  The leak seems to occur in the presence
of three things:

    - an installed trace function
    - a string format operation
    - a nested lambda that causes the string to be a cell



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Comment By: Neal Norwitz (nnorwitz)
Date: 2001-12-06 07:08

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Attached a new file that was built with
current CVS and w/o optimization so
the line #s should be good

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Comment By: Jeremy Hylton (jhylton)
Date: 2001-12-06 06:48

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Weird.  The leak is reported in PyString_FormatString(),
which is called because of a string interpolation call in
test_scope:  "_%s__%s" % (klass.__name__, name).  That's the
only use of % on a string in the module.

Unfortunately, the line numbers in the Purify output don't
match the current CVS version of stringobject.c.  Neal--
Would it be hard to do a new run with the current CVS?


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Comment By: Tim Peters (tim_one)
Date: 2001-11-27 12:04

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Assigned to Barry.

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