[New-bugs-announce] [issue1301] Bad assertion in _tkinter.c

[Stephen P. Schaefer]

New submission from Stephen P. Schaefer:

The following fails with python 2.5 as built by Fedora 7:

t2.py:
import sys, Tkinter
Tkinter.Button(text=u"").pack( )
Tkinter.mainloop( )

$ python t2.py
python: ./Modules/_tkinter.c:941: AsObj: Assertion `size < size *
sizeof(Tcl_UniChar)' failed.
Aborted

The following patch corrects the problem:

--- Python-2.5-fc7/Modules/_tkinter.c   2006-08-11 22:33:36.000000000 -0400
+++ Python-2.5/Modules/_tkinter.c       2007-10-18 18:44:40.000000000 -0400
@@ -938,7 +938,7 @@
 #if defined(Py_UNICODE_WIDE) && TCL_UTF_MAX == 3
                Tcl_UniChar *outbuf;
                Py_ssize_t i;
-               assert(size < size * sizeof(Tcl_UniChar));
+               assert(size == 0 || size < size * sizeof(Tcl_UniChar));
                outbuf = (Tcl_UniChar*)ckalloc(size * sizeof(Tcl_UniChar));
                if (!outbuf) {
                        PyErr_NoMemory();

----------
components: Tkinter
messages: 56546
nosy: thyrsus
severity: normal
status: open
title: Bad assertion in _tkinter.c
versions: Python 2.5

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Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1301>
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