Bug #76477 [NEW]: Opcache causes empty return value

From: mark2011 at mayberg dot se Operating system: Linux PHP version: 7.2.6 Package: opcache Bug Type: Bug Bug description:Opcache causes empty return value Description: ------------ Running the test script without opcache works fine. But with opcache enabled it results in an unexpected behaviour (after second execution). The test script below is extracted from a bigger library, I isolated a small test case. PHP 7.2.6 is not yet available for my distro. PHP 7.0, 7.1 does not show this error. Test script: --------------- <?php echo "PHP ".PHP_VERSION." ".PHP_SAPI."<br>\n"; $token = "ABC"; $lengthBytes = strlenb($token); echo "$token $lengthBytes ".($lengthBytes!=0 ? "ok" : "error")."<br>\n"; testString(); function testString() { $token = "ABC"; $lengthBytes = strlenb($token); echo "$token $lengthBytes ".($lengthBytes!=0 ? "ok" : "error")."<br>\n"; } function strlenb() { return call_user_func_array("strlen", func_get_args()); } ?> Expected result: ---------------- PHP 7.2.5-0ubuntu0.18.04.1 apache2handler ABC 3 ok ABC 3 ok Actual result: -------------- PHP 7.2.5-0ubuntu0.18.04.1 apache2handler ABC 3 ok ABC error -- Edit bug report at https://bugs.php.net/bug.php?id=76477&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=76477&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=76477&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=76477&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=76477&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=76477&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=76477&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=76477&r=needscript Try newer version: https://bugs.php.net/fix.php?id=76477&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=76477&r=support Expected behavior: https://bugs.php.net/fix.php?id=76477&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=76477&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=76477&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=76477&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=76477&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=76477&r=dst IIS Stability: https://bugs.php.net/fix.php?id=76477&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=76477&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=76477&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=76477&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=76477&r=mysqlcfg