comparison vendor/symfony/yaml/Inline.php @ 5:12f9dff5fda9 tip

Update to Drupal core 8.7.1

             // an unquoted *
             if (false === $value || '' === $value) {
                 throw new ParseException('A reference must contain at least one character.', self::$parsedLineNumber + 1, $value, self::$parsedFilename);
             }
 
-            if (!array_key_exists($value, $references)) {
+            if (!\array_key_exists($value, $references)) {
                 throw new ParseException(sprintf('Reference "%s" does not exist.', $value), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
             }
 
             return $references[$value];
         }