Ticket #16562: 16562.2.patch

wp-admin/includes/plugin.php

@@ -563 +563 @@
 function deactivate_plugins( $plugins, $silent = false ) {
         if ( is_multisite() )
                 $network_current = get_site_option( 'active_sitewide_plugins', array() );
-        $current = get_option( 'active_plugins', array() );
+        $current = (array) get_option( 'active_plugins', array() );
         $do_blog = $do_network = false;
 
         foreach ( (array) $plugins as $plugin ) {
@@ -583 +583 @@
                         $key = array_search( $plugin, $current );
                         if ( false !== $key ) {
                                 $do_blog = true;
-                                array_splice( $current, $key, 1 );
+                                unset( $current[ $key ] );
                         }
                 }