Bug #80184 [NEW]: Complex expression in while / if statements resolves to false incorrectly

From: jelly dot legend at gmail dot com Operating system: MacOS 10.15.6 PHP version: 8.0.0rc1 Package: opcache Bug Type: Bug Bug description:Complex expression in while / if statements resolves to false incorrectly Description: ------------ If a use a complex expression as an if condition or while condition, it incorrectly resolves to false. While it correctly evaluates it if passed to a variable and printed. PHP version: PHP 8.0.0rc1 (cli) (built: Oct 4 2020 13:58:56) ( NTS ) Copyright (c) The PHP Group Zend Engine v4.0.0-dev, Copyright (c) Zend Technologies with Zend OPcache v8.0.0rc1, Copyright (c), by Zend Technologies php.development-ini changes: zend_extension=opcache opcache.enable=1 opcache.enable_cli=1 opcache.memory_consumption=128 If I disable opcache I get the correct results. PHP was built from source. With following configuration. ./configure \ --prefix=.../php-8.0.0rc1 \ --with-config-file-path=.../php-8.0.0rc1/etc \ --enable-mbstring \ --enable-sockets \ --enable-opcache \ --with-openssl=/usr/local/openssl \ --with-curl \ --with-sodium \ --with-bz2 \ --with-zlib \ --with-zip I was first noticed the bug on beta-4 but decided to try it out in rc-1 instead. Test script: --------------- $factory = function (string $msg): Closure { return function () use ($msg): void { echo $msg; }; }; $callbacks = [ $factory('First item!'), $factory('Second item!'), $factory('Third item!'), $factory('Fourth item!'), ]; $nl = function (): void { echo PHP_EOL; }; while ((null !== $callback = array_shift($callbacks)) && ($callback() || $nl() || true)) /**/; // exists after first item, should iterate thought all // Full test at: https://pastebin.com/br54nGvM Expected result: ---------------- First item! Second item! Third item! Fourth item! Actual result: -------------- First item! -- Edit bug report at https://bugs.php.net/bug.php?id=80184&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80184&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80184&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80184&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80184&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80184&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80184&r=support Expected behavior: https://bugs.php.net/fix.php?id=80184&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80184&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80184&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80184&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80184&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80184&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80184&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80184&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80184&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80184&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80184&r=mysqlcfg