Index: src/wp-admin/includes/class-wp-upgrader-skin.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/wp-admin/includes/class-wp-upgrader-skin.php	(revision 8d6d88ffbbda571941dcab581ab8407bdfdf9a80)
+++ src/wp-admin/includes/class-wp-upgrader-skin.php	(revision )
@@ -169,7 +169,7 @@
 		} else {
 			echo '<script type="text/javascript">
 					(function( wp ) {
-						if ( wp && wp.updates.decrementCount ) {
+						if ( wp && wp.updates && wp.updates.decrementCount ) {
 							wp.updates.decrementCount( "' . $type . '" );
 						}
 					})( window.wp );