Bug #79925 [NEW]: Magic method __set_state signature check does not support covariance

From: ondrej at mirtes dot cz Operating system: All PHP version: 8.0Git-2020-08-02 (Git) Package: *General Issues Bug Type: Bug Bug description:Magic method __set_state signature check does not support covariance Description: ------------ Magic methods from this RFC https://wiki.php.net/rfc/magic-methods-signature should support covariance but don't. You should be able to narrow down a return type but currently can't. Test script: --------------- <?php class Foo { /** * @param mixed[] $properties * @return Type */ public static function __set_state(array $properties): self { return new self(); } } Expected result: ---------------- nothing Actual result: -------------- Fatal error: Foo::__set_state(): Return type must be object when declared in... -- Edit bug report at https://bugs.php.net/bug.php?id=79925&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=79925&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=79925&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=79925&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=79925&r=needscript Try newer version: https://bugs.php.net/fix.php?id=79925&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=79925&r=support Expected behavior: https://bugs.php.net/fix.php?id=79925&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=79925&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=79925&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=79925&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=79925&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=79925&r=dst IIS Stability: https://bugs.php.net/fix.php?id=79925&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=79925&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=79925&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=79925&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=79925&r=mysqlcfg