Ticket #56980: 56980.diff

src/wp-includes/formatting.php

@@ -1601 +1601 @@
 
                 // Unicode sequence normalization from NFD (Normalization Form Decomposed)
                 // to NFC (Normalization Form [Pre]Composed), the encoding used in this function.
-                if ( function_exists( 'normalizer_normalize' ) ) {
+                if ( function_exists( 'normalizer_normalize' ) && class_exists( 'Normalizer' ) ) {
                         if ( ! normalizer_is_normalized( $string, Normalizer::FORM_C ) ) {
                                 $string = normalizer_normalize( $string, Normalizer::FORM_C );
                         }