diff -r 1340e298aa7e Python/import.c
--- a/Python/import.c	Wed Aug 31 08:22:29 2016 +0100
+++ b/Python/import.c	Wed Aug 31 19:15:38 2016 +0800
@@ -1941,19 +1941,15 @@
 
     def = PyModule_GetDef(mod);
     if (def == NULL) {
-        if (PyErr_Occurred()) {
-            return -1;
-        }
         return 0;
     }
+
     state = PyModule_GetState(mod);
-    if (PyErr_Occurred()) {
-        return -1;
-    }
     if (state) {
         /* Already initialized; skip reload */
         return 0;
     }
+
     return PyModule_ExecDef(mod, def);
 }