STINNER Victor <[EMAIL PROTECTED]> added the comment: Valgrind output for Python trunk compiled with pydebug option: ==29848== Invalid read of size 4 ==29848== at 0x809AF61: _Py_ForgetReference (object.c:2044) ==29848== by 0x809AFCF: _Py_Dealloc (object.c:2065) ==29848== by 0x80FE635: call_function (ceval.c:3653) ==29848== by 0x80F9C83: PyEval_EvalFrameEx (ceval.c:2350) ==29848== by 0x80FC2D1: PyEval_EvalCodeEx (ceval.c:2914) ==29848== by 0x80FEAFE: fast_function (ceval.c:3747) ==29848== by 0x80FE75F: call_function (ceval.c:3672) ==29848== by 0x80F9C83: PyEval_EvalFrameEx (ceval.c:2350) ==29848== by 0x80FC2D1: PyEval_EvalCodeEx (ceval.c:2914) ==29848== by 0x80F1219: PyEval_EvalCode (ceval.c:495) ==29848== by 0x812838E: run_mod (pythonrun.c:1330) ==29848== by 0x8128324: PyRun_FileExFlags (pythonrun.c:1316) ==29848== Address 0x4475680 is 8 bytes inside a block of size 896 free'd ==29848== at 0x402237F: free (vg_replace_malloc.c:233) ==29848== by 0x809C51D: PyObject_Free (obmalloc.c:1114) ==29848== by 0x809C86E: _PyObject_DebugFree (obmalloc.c:1361) ==29848== by 0x814ECBD: pattern_scanner (_sre.c:3371) ==29848== by 0x814C245: pattern_finditer (_sre.c:2148) ==29848== by 0x81708D6: PyCFunction_Call (methodobject.c:81) ==29848== by 0x80FE5C9: call_function (ceval.c:3651) ==29848== by 0x80F9C83: PyEval_EvalFrameEx (ceval.c:2350) ==29848== by 0x80FC2D1: PyEval_EvalCodeEx (ceval.c:2914) ==29848== by 0x80FEAFE: fast_function (ceval.c:3747) ==29848== by 0x80FE75F: call_function (ceval.c:3672) ==29848== by 0x80F9C83: PyEval_EvalFrameEx (ceval.c:2350) Fatal Python error: UNREF invalid object
The error comes from invalid use of PyObject_DEL(): as said by georg.brandl, "PyObject_NEW adds the object to the global linked list of all objects, which PyObject_DEL obviously doesn't undo". An invalid object will stay in the object list until it is used and then Python crash. _______________________________________ Python tracker <[EMAIL PROTECTED]> <http://bugs.python.org/issue3299> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
