Ticket #2847: 2847.01.patch

src/includes/admin/admin.php

@@ -634 +634 @@
          */
         public function register_admin_style () {
 
+                // Color schemes are not available when running out of src
+                if ( false !== strpos( $GLOBALS['wp_version'], '-src' ) ) {
+                        return;
+                }
+
                 // RTL and/or minified
                 $suffix  = is_rtl() ? '-rtl' : '';
                 $suffix .= defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '' : '.min';