New submission from Prashant Kurnawal:
I have embedded python3.3 in my application.
I got a crash when I ran a python script containing sample TK window creation
code in it.
On interpreter shutdown, all strings are released (through
_PyUnicode_ClearStaticStrings). (I Found this description in one of the
comments of object.h header file)
When I tried to debug python source, I found a defect in
_PyUnicode_ClearStaticStrings() method.
Existing function definition in python3.3 source (unicodeobject.c) is as follows
void _PyUnicode_ClearStaticStrings()
{
_Py_Identifier *i;
for (i = static_strings; i; i = i->next) {
Py_DECREF(i->object);
i->object = NULL;
i->next = NULL;
}
}
Here, for loop will not free all the static strings. It will free only the
first static string in the list.
This loop needs to be corrected.
I corrected the loop in following way and its working fine for me.
void _PyUnicode_ClearStaticStrings()
{
_Py_Identifier *i;
while(static_strings->next != NULL)
{
i = static_strings;
static_strings = static_strings->next;
Py_DECREF(i->object);
i->object = NULL;
i->next = NULL;
}
Py_DECREF(static_strings->object);
static_strings->object = NULL;
static_strings = NULL;
}
Is this a bug or it is done so intentionally..?
----------
components: None
files: unicodeobject.c
messages: 179432
nosy: benjamin.peterson, brett.cannon, georg.brandl, goodger, larry,
prashantkurnawal, python-dev
priority: normal
severity: normal
status: open
title: Bug in _PyUnicode_ClearStaticStrings() method of unicodeobject.c
type: crash
versions: Python 3.3
Added file: http://bugs.python.org/file28646/unicodeobject.c
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Python tracker <[email protected]>
<http://bugs.python.org/issue16906>
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