@@ -0,0 +1,2 @@
+:c:func:`PyDescr_NewMethod` and :c:func:`PyCFunction_NewEx` now include the
+method name in the SystemError "bad call flags" error message to ease debug.
@@ -892,7 +892,8 @@ PyDescr_NewMethod(PyTypeObject *type, PyMethodDef *method)
             vectorcall = method_vectorcall_O;
             break;
         default:
-            PyErr_SetString(PyExc_SystemError, "bad call flags");
+            PyErr_Format(PyExc_SystemError,
+                         "%s() method: bad call flags", method->ml_name);
             return NULL;
     }
 
 
@@ -62,7 +62,8 @@ PyCFunction_NewEx(PyMethodDef *ml, PyObject *self, PyObject *module)
             vectorcall = cfunction_vectorcall_O;
             break;
         default:
-            PyErr_SetString(PyExc_SystemError, "bad call flags");
+            PyErr_Format(PyExc_SystemError,
+                         "%s() method: bad call flags", ml->ml_name);
             return NULL;
     }
Original file line number	Diff line number	Diff line change
@@ -0,0 +1,2 @@
	1	+ :c:func:`PyDescr_NewMethod` and :c:func:`PyCFunction_NewEx` now include the
	2	+ method name in the SystemError "bad call flags" error message to ease debug.
Original file line number	Diff line number	Diff line change
@@ -892,7 +892,8 @@ PyDescr_NewMethod(PyTypeObject type, PyMethodDef method)
892	892	vectorcall = method_vectorcall_O;
893	893	break;
894	894	default:
895		- PyErr_SetString(PyExc_SystemError, "bad call flags");
	895	+ PyErr_Format(PyExc_SystemError,
	896	+ "%s() method: bad call flags", method->ml_name);
896	897	return NULL;
897	898	}
898	899
Original file line number	Diff line number	Diff line change
@@ -62,7 +62,8 @@ PyCFunction_NewEx(PyMethodDef ml, PyObject self, PyObject *module)
62	62	vectorcall = cfunction_vectorcall_O;
63	63	break;
64	64	default:
65		- PyErr_SetString(PyExc_SystemError, "bad call flags");
	65	+ PyErr_Format(PyExc_SystemError,
	66	+ "%s() method: bad call flags", ml->ml_name);
66	67	return NULL;
67	68	}
68	69