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bpo-36421: Fix a possible double decref in _ctypes.c's PyCArrayType_new(). (GH-12530)

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Set type_attr to NULL after the assignment to stgdict->proto (like
what is done with stgdict after the Py_SETREF() call) so that it is
not decrefed twice on error.
(cherry picked from commit 5e333784f0)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>
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Miss Islington (bot) 2019-03-25 01:34:26 -07:00 • committed by GitHub
parent 9dbb09fc27
commit fa27870992
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Misc/NEWS.d/next/Core and Builtins/2019-03-24-21-33-22.bpo-36421.gJ2Pv9.rst Normal file
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@ -0,0 +1 @@
Fix a possible double decref in _ctypes.c's ``PyCArrayType_new()``.

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Modules/_ctypes/_ctypes.c
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@ -1481,6 +1481,7 @@ PyCArrayType_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
stgdict->align = itemalign;
stgdict->length = length;
stgdict->proto = type_attr;
type_attr = NULL;
stgdict->paramfunc = &PyCArrayType_paramfunc;