[3.10] bpo-46433: _PyType_GetModuleByDef: handle static types in MRO (GH-30696) (GH-31262)


(cherry picked from commit 0ef08530124c5ca13a9394f4ac18bee8e6c66409)
diff --git a/Modules/_testmultiphase.c b/Modules/_testmultiphase.c
index e0ed77d..58282ce 100644
--- a/Modules/_testmultiphase.c
+++ b/Modules/_testmultiphase.c
@@ -122,6 +122,8 @@ static PyType_Spec Example_Type_spec = {
 
 
 static PyModuleDef def_meth_state_access;
+static PyModuleDef def_nonmodule;
+static PyModuleDef def_nonmodule_with_methods;
 
 /*[clinic input]
 _testmultiphase.StateAccessType.get_defining_module
@@ -150,6 +152,24 @@ _testmultiphase_StateAccessType_get_defining_module_impl(StateAccessTypeObject *
 }
 
 /*[clinic input]
+_testmultiphase.StateAccessType.getmodulebydef_bad_def
+
+    cls: defining_class
+
+Test that result of _PyType_GetModuleByDef with a bad def is NULL.
+[clinic start generated code]*/
+
+static PyObject *
+_testmultiphase_StateAccessType_getmodulebydef_bad_def_impl(StateAccessTypeObject *self,
+                                                            PyTypeObject *cls)
+/*[clinic end generated code: output=64509074dfcdbd31 input=906047715ee293cd]*/
+{
+    _PyType_GetModuleByDef(Py_TYPE(self), &def_nonmodule);  // should raise
+    assert(PyErr_Occurred());
+    return NULL;
+}
+
+/*[clinic input]
 _testmultiphase.StateAccessType.increment_count_clinic
 
     cls: defining_class
@@ -245,6 +265,7 @@ _testmultiphase_StateAccessType_get_count_impl(StateAccessTypeObject *self,
 
 static PyMethodDef StateAccessType_methods[] = {
     _TESTMULTIPHASE_STATEACCESSTYPE_GET_DEFINING_MODULE_METHODDEF
+    _TESTMULTIPHASE_STATEACCESSTYPE_GETMODULEBYDEF_BAD_DEF_METHODDEF
     _TESTMULTIPHASE_STATEACCESSTYPE_GET_COUNT_METHODDEF
     _TESTMULTIPHASE_STATEACCESSTYPE_INCREMENT_COUNT_CLINIC_METHODDEF
     {
@@ -433,9 +454,6 @@ PyInit__testmultiphase(PyObject *spec)
 
 /**** Importing a non-module object ****/
 
-static PyModuleDef def_nonmodule;
-static PyModuleDef def_nonmodule_with_methods;
-
 /* Create a SimpleNamespace(three=3) */
 static PyObject*
 createfunc_nonmodule(PyObject *spec, PyModuleDef *def)
diff --git a/Modules/clinic/_testmultiphase.c.h b/Modules/clinic/_testmultiphase.c.h
index 55f934b..17c28d5 100644
--- a/Modules/clinic/_testmultiphase.c.h
+++ b/Modules/clinic/_testmultiphase.c.h
@@ -35,6 +35,36 @@ _testmultiphase_StateAccessType_get_defining_module(StateAccessTypeObject *self,
     return return_value;
 }
 
+PyDoc_STRVAR(_testmultiphase_StateAccessType_getmodulebydef_bad_def__doc__,
+"getmodulebydef_bad_def($self, /)\n"
+"--\n"
+"\n"
+"Test that result of _PyType_GetModuleByDef with a bad def is NULL.");
+
+#define _TESTMULTIPHASE_STATEACCESSTYPE_GETMODULEBYDEF_BAD_DEF_METHODDEF    \
+    {"getmodulebydef_bad_def", (PyCFunction)(void(*)(void))_testmultiphase_StateAccessType_getmodulebydef_bad_def, METH_METHOD|METH_FASTCALL|METH_KEYWORDS, _testmultiphase_StateAccessType_getmodulebydef_bad_def__doc__},
+
+static PyObject *
+_testmultiphase_StateAccessType_getmodulebydef_bad_def_impl(StateAccessTypeObject *self,
+                                                            PyTypeObject *cls);
+
+static PyObject *
+_testmultiphase_StateAccessType_getmodulebydef_bad_def(StateAccessTypeObject *self, PyTypeObject *cls, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
+{
+    PyObject *return_value = NULL;
+    static const char * const _keywords[] = { NULL};
+    static _PyArg_Parser _parser = {":getmodulebydef_bad_def", _keywords, 0};
+
+    if (!_PyArg_ParseStackAndKeywords(args, nargs, kwnames, &_parser
+        )) {
+        goto exit;
+    }
+    return_value = _testmultiphase_StateAccessType_getmodulebydef_bad_def_impl(self, cls);
+
+exit:
+    return return_value;
+}
+
 PyDoc_STRVAR(_testmultiphase_StateAccessType_increment_count_clinic__doc__,
 "increment_count_clinic($self, /, n=1, *, twice=False)\n"
 "--\n"
@@ -101,4 +131,4 @@ _testmultiphase_StateAccessType_get_count(StateAccessTypeObject *self, PyTypeObj
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=f01137bb3b373e14 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=eb1b8c2ee6290be3 input=a9049054013a1b77]*/