[issue3611] invalid exception context
STINNER Victor
report at bugs.python.org
Wed Aug 20 04:45:52 CEST 2008
STINNER Victor <haypo at users.sourceforge.net> added the comment:
I also noticed a crash in PyErr_SetObject(): in block <line 68..86>,
tstate->exc_value value may changes and so it's possible that
tstate->exc_value becomes NULL. I added a test to avoid this crash:
Index: Python/errors.c
===================================================================
--- Python/errors.c (révision 65899)
+++ Python/errors.c (copie de travail)
@@ -88,7 +88,7 @@
This is O(chain length) but context chains are
usually very short. Sensitive readers may try
to inline the call to PyException_GetContext. */
- if (tstate->exc_value != value) {
+ if (tstate->exc_value != value && tstate->exc_value !=
NULL) {
PyObject *o = tstate->exc_value, *context;
while ((context = PyException_GetContext(o)))
{
Py_DECREF(context);
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<http://bugs.python.org/issue3611>
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