Ticket #41450: 41450.diff

src/wp-includes/formatting.php

@@ -4741 +4741 @@
  * @return string Sanitized string.
  */
 function _sanitize_text_fields( $str, $keep_newlines = false ) {
+  if ( !is_string($str) ) {
+    return '';
+  }
         $filtered = wp_check_invalid_utf8( $str );
 
         if ( strpos($filtered, '<') !== false ) {

tests/phpunit/tests/formatting/SanitizeTextField.php

@@ -93 +93 @@
                                 'Nested octects %%%ABABAB %A%A%ABBB',
                                 'Nested octects',
                         ),
+                        array(
+                                array(),
+                                '',
+                        ),
                 );
         }