Ticket #37358: 37358.patch

src/wp-includes/load.php

@@ -334 +334 @@
                 error_reporting( E_CORE_ERROR | E_CORE_WARNING | E_COMPILE_ERROR | E_ERROR | E_WARNING | E_PARSE | E_USER_ERROR | E_USER_WARNING | E_RECOVERABLE_ERROR );
         }
 
-        if ( defined( 'XMLRPC_REQUEST' ) || defined( 'REST_REQUEST' ) || ( defined( 'DOING_AJAX' ) && DOING_AJAX ) ) {
+        if ( defined( 'XMLRPC_REQUEST' ) || defined( 'REST_REQUEST' ) || ( defined( 'DOING_AJAX' ) && DOING_AJAX ) || ( defined( 'WP_INSTALLING' ) && WP_INSTALLING ) ) {
                 @ini_set( 'display_errors', 0 );
         }
 }