Ticket #30672: 30672.patch

src/wp-admin/js/revisions.js

@@ -405 +405 @@
                         this.set( {
                                 to : this.revisions.get( state.to ),
                                 from : this.revisions.get( state.from ),
-                                compareTwoMode : this.revisions.get( state.compareTwoMode )
+                                compareTwoMode : state.compareTwoMode
                         } );
 
                         // Start the router if browser supports History API