Ticket #31441: 31441.12.patch

src/wp-includes/js/tinymce/plugins/wptextpattern/plugin.js

@@ -39 +39 @@
 
                         rng = editor.selection.getRng();
                         node = rng.startContainer;
-                        text = node.nodeValue;
 
-                        if ( node.nodeType !== 3 ) {
+                        if ( ! node || node.nodeType !== 3 ) {
                                 return;
                         }
 
+                        text = node.nodeValue;
                         parent = editor.dom.getParent( node, 'p' );
 
                         if ( ! parent ) {