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Fix assert in PyTuple_GET_SIZE

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Occurs in debug interpreter builds of python-3.7 when calling tp_new in
a few testcases such as Examples/python/extend.

Closes #1321
This commit is contained in:
Andreas Gaeer 2018-09-03 19:52:43 +01:00 • committed by William S Fulton
commit 0165180735
2 changed files with 12 additions and 4 deletions
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4
CHANGES.current
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@ -7,6 +7,10 @@ the issue number to the end of the URL: https://github.com/swig/swig/issues/
Version 4.0.0 (in progress) Version 4.0.0 (in progress)
=========================== ===========================
2018-09-02: andreas.gaeer,tkrasnukha
[Python] #1321 Fix assert in PyTuple_GET_SIZE in debug interpreter builds of python-3.7
when calling tp_new.
2018-09-01: ChristopherHogan 2018-09-01: ChristopherHogan
[Guile] #1288 Fix garbage collection for guile >= 2.0.12. [Guile] #1288 Fix garbage collection for guile >= 2.0.12.

12
Lib/python/pyrun.swg
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@ -1254,10 +1254,14 @@ SWIG_Python_NewShadowInstance(SwigPyClientData *data, PyObject *swig_this)
} }
} else { } else {
#if PY_VERSION_HEX >= 0x03000000 #if PY_VERSION_HEX >= 0x03000000
inst = ((PyTypeObject*) data->newargs)->tp_new((PyTypeObject*) data->newargs, Py_None, Py_None); PyObject *empty_args = PyTuple_New(0);
if (inst) { if (empty_args) {
PyObject_SetAttr(inst, SWIG_This(), swig_this); inst = ((PyTypeObject *)data->newargs)->tp_new((PyTypeObject *)data->newargs, empty_args, Py_None);
Py_TYPE(inst)->tp_flags &= ~Py_TPFLAGS_VALID_VERSION_TAG; Py_DECREF(empty_args);
if (inst) {
PyObject_SetAttr(inst, SWIG_This(), swig_this);
Py_TYPE(inst)->tp_flags &= ~Py_TPFLAGS_VALID_VERSION_TAG;
}
} }
#else #else
PyObject *dict = PyDict_New(); PyObject *dict = PyDict_New();