mirror of https://github.com/python/cpython
fix a refleak in slot_sq_length (#1162)
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@ -5931,6 +5931,7 @@ slot_sq_length(PyObject *self)
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assert(PyLong_Check(res));
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if (Py_SIZE(res) < 0) {
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Py_DECREF(res);
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PyErr_SetString(PyExc_ValueError,
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"__len__() should return >= 0");
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return -1;
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