sysset(name, NULL) does nothing if sys.name is undefined

diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index d725c88cc8b0debf8e0404cc022bc11e3ba3c5e4..7089fc7a3d81cf5b212df788e03df278152a4236 100644 (file)
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -85,8 +85,12 @@ sysset(name, v)
        char *name;
        object *v;
 {
-       if (v == NULL)
-               return dictremove(sysdict, name);
+       if (v == NULL) {
+               if (dictlookup(sysdict, name) == NULL)
+                       return 0;
+               else
+                       return dictremove(sysdict, name);
+       }
        else
                return dictinsert(sysdict, name, v);
 }