Ticket #34164: 34164.1.diff

src/wp-includes/http.php

@@ -523 +523 @@
 
         $parsed_home = @parse_url( get_option( 'home' ) );
 
-        $same_host = strtolower( $parsed_home['host'] ) === strtolower( $parsed_url['host'] );
+        if ( isset( $parsed_home['host'] ) ) { 
+                $same_host = ( strtolower( $parsed_home['host'] ) === strtolower( $parsed_url['host'] ) || 'localhost' === strtolower( $parsed_url['host'] ) );
+        } else {
+                $same_host = false;
+        }
 
         if ( ! $same_host ) {
                 $host = trim( $parsed_url['host'], '.' );