Ticket #36631: 36631.diff

src/wp-includes/js/wp-util.js

@@ -30 +30 @@
                         };
 
                 return function ( data ) {
+                        if ( ! document.getElementById( 'tmpl-' + id ) ) {
+                                throw new Error( 'Template not found: ' + '#tmpl-' + id );
+                        }
                         compiled = compiled || _.template( $( '#tmpl-' + id ).html(), null, options );
                         return compiled( data );
                 };