exec(): accept frozendict for globals

Author: vstinner

Objects/dictobject.c

@@ -2623,7 +2623,7 @@ _PyDict_LoadGlobalStackRef(PyDictObject *globals, PyDictObject *builtins, PyObje
 PyObject *
 _PyDict_LoadBuiltinsFromGlobals(PyObject *globals)
 {
-    if (!PyDict_Check(globals)) {
+    if (!_PyAnyDict_Check(globals)) {
         PyErr_BadInternalCall();
         return NULL;
     }

Python/bltinmodule.c

@@ -1135,7 +1135,7 @@ builtin_exec_impl(PyObject *module, PyObject *source, PyObject *globals,
         locals = Py_NewRef(globals);
     }
 
-    if (!PyDict_Check(globals)) {
+    if (!_PyAnyDict_Check(globals)) {
         PyErr_Format(PyExc_TypeError, "exec() globals must be a dict, not %.100s",
                      Py_TYPE(globals)->tp_name);
         goto error;

Python/pythonrun.c

@@ -1353,7 +1353,7 @@ static PyObject *
 run_eval_code_obj(PyThreadState *tstate, PyCodeObject *co, PyObject *globals, PyObject *locals)
 {
     /* Set globals['__builtins__'] if it doesn't exist */
-    if (!globals || !PyDict_Check(globals)) {
+    if (!globals || !_PyAnyDict_Check(globals)) {
         PyErr_SetString(PyExc_SystemError, "globals must be a real dict");
         return NULL;
     }