Issue #13577: Built-in methods and functions now have a __qualname__.
Patch by sbt.
diff --git a/Include/methodobject.h b/Include/methodobject.h
index 7e67c0b..d798d13 100644
--- a/Include/methodobject.h
+++ b/Include/methodobject.h
@@ -30,7 +30,8 @@
 #define PyCFunction_GET_FUNCTION(func) \
         (((PyCFunctionObject *)func) -> m_ml -> ml_meth)
 #define PyCFunction_GET_SELF(func) \
-	(((PyCFunctionObject *)func) -> m_self)
+        (((PyCFunctionObject *)func) -> m_ml -> ml_flags & METH_STATIC ? \
+         NULL : ((PyCFunctionObject *)func) -> m_self)
 #define PyCFunction_GET_FLAGS(func) \
 	(((PyCFunctionObject *)func) -> m_ml -> ml_flags)
 #endif