Ticket #33286: 33286.patch

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

@@ -702 +702 @@
                                         scrollY = window.pageYOffset || document.documentElement.scrollTop,
                                         windowWidth = window.innerWidth,
                                         windowHeight = window.innerHeight,
-                                        iframeRect = mceIframe.getBoundingClientRect(),
+                                        iframeRect = mceIframe ? mceIframe.getBoundingClientRect() : {
+                                                top: 0,
+                                                right: windowWidth,
+                                                bottom: windowHeight,
+                                                left: 0,
+                                                width: windowWidth,
+                                                height: windowHeight
+                                        },
                                         toolbar = this.getEl(),
                                         toolbarWidth = toolbar.offsetWidth,
                                         toolbarHeight = toolbar.offsetHeight,