Ticket #33330: 33330.2.diff

src/wp-admin/includes/class-wp-plugin-install-list-table.php

@@ -40 +40 @@
 
                 $plugin_info = get_site_transient( 'update_plugins' );
                 if ( isset( $plugin_info->no_update ) ) {
-                        foreach ( $plugin_info->no_update as $plugin ) {
+                        foreach ( $plugin_info->no_update as $file => $plugin ) {
+                                if ( ! isset( $plugin->slug ) ) {
+                                        trigger_error( sprintf( __( '%s did not return a plugin slug' ), $file ) );
+                                        break;
+                                }
                                 $slugs[] = $plugin->slug;
                         }
                 }
 
                 if ( isset( $plugin_info->response ) ) {
-                        foreach ( $plugin_info->response as $plugin ) {
+                        foreach ( $plugin_info->response as $file => $plugin ) {
+                                if ( ! isset( $plugin->slug ) ) {
+                                        trigger_error( sprintf( __( '%s did not return a plugin slug' ), $file ) );
+                                        break;
+                                }
                                 $slugs[] = $plugin->slug;
                         }
                 }