### Description The following code: ```php --TEST-- MessageFormatter::parseMessage() with invalid locale --EXTENSIONS-- intl --FILE-- <?php $locale = 'root'; $fmt = '{0,whatever} would not work!'; $str = 'failing'; $m = MessageFormatter::parseMessage($locale, $fmt, $str); var_dump($m); var_dump(intl_get_error_message()); $m = msgfmt_parse_message($locale, $fmt, $str); var_dump($m); var_dump(intl_get_error_message()); ?> ``` leaks memory if ran under ASAN. Found while working on #19196 ### PHP Version ```plain master, but probably 8.3 and lower too ``` ### Operating System _No response_