Missing decref in error handling of `func_get_annotation_dict`

[sobolevn]

Bug report

Here:

cpython/Objects/funcobject.c

Lines 537 to 551 in af4329e

	PyObject *ann_dict = PyDict_New();
	if (ann_dict == NULL) {
	return NULL;
	}
	assert(PyTuple_GET_SIZE(ann_tuple) % 2 == 0);
	for (Py_ssize_t i = 0; i < PyTuple_GET_SIZE(ann_tuple); i += 2) {
	int err = PyDict_SetItem(ann_dict,
	PyTuple_GET_ITEM(ann_tuple, i),
	PyTuple_GET_ITEM(ann_tuple, i + 1));
	if (err < 0) {
	return NULL;
	}

• We allocate ann_dict
• If PyDict_SetItem fails, we return NULL
• We don't deallocate the dict

I will send a PR.

Linked PRs

• gh-122229: Add missing Py_DECREF in func_get_annotation_dict #122230