Ticket #18932: 18932.diff

wp-includes/capabilities.php

@@ -718 +718 @@
          * @param string $role Role name.
          */
         function set_role( $role ) {
-                foreach ( (array) $this->roles as $oldrole )
-                        unset( $this->caps[$oldrole] );
-
                 if ( 1 == count( $this->roles ) && $role == $this->roles[0] )
                         return;
 
+                foreach ( (array) $this->roles as $oldrole )
+                        unset( $this->caps[$oldrole] );
+
                 if ( !empty( $role ) ) {
                         $this->caps[$role] = true;
                         $this->roles = array( $role => true );