Bug #80659 [NEW]: unexp. Typecast at not fitting function return type declaration

From: thomas dot bindewald at metanet dot ch Operating system: Linux 4.19.0-13-amd64 x86_64 GNU PHP version: 8.0.1 Package: Class/Object related Bug Type: Bug Bug description:unexp. Typecast at not fitting function return type declaration Description: ------------ Environment: Debian 10 Linux PHP-Packages from https://packages.sury.org/php/ --- PHP 8.0.1 (cli) (built: Jan 12 2021 13:59:46) ( NTS ) Copyright (c) The PHP Group Zend Engine v4.0.1, Copyright (c) Zend Technologies with Zend OPcache v8.0.1, Copyright (c), by Zend Technologies with Xdebug v3.0.1, Copyright (c) 2002-2020, by Derick Rethans Test script: --------------- <?php ​function foooo() : false|string|stdClass { $xmlString = '<xml><woche><Montag>Erdbeermarmelade</Montag><Dienstag>Lindenbluetenhonig</Dienstag></woche></xml>'; $xmlObj = new SimpleXMLElement($xmlString); var_dump($xmlObj); return $xmlObj; } ​$wert = foooo(); var_dump($wert); exit; Expected result: ---------------- TypeError Exception being thrown. Actual result: -------------- XML-Object silently being casted to empty string. -- Edit bug report at https://bugs.php.net/bug.php?id=80659&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80659&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80659&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80659&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80659&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80659&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80659&r=support Expected behavior: https://bugs.php.net/fix.php?id=80659&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80659&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80659&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80659&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80659&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80659&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80659&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80659&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80659&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80659&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80659&r=mysqlcfg