Bug #76581 [NEW]: Multi-level parent/self does not get correctly resolved

From: levim Operating system: PHP version: 7.3.0alpha2 Package: Class/Object related Bug Type: Bug Bug description:Multi-level parent/self does not get correctly resolved Description: ------------ This affects all PHP 7.X versions to date (7.3 alpha 1). Test script: --------------- https://3v4l.org/Od72V <?php interface A { function m(B $s): self; } class B implements A { function m(self $s): parent { return $this; } } class C extends B { function m(parent $s): A { return $this; } } ?> Expected result: ---------------- No error. Actual result: -------------- Fatal error: Declaration of C::m(B $s): A must be compatible with B::m(B $s): parent in % on line %d -- Edit bug report at https://bugs.php.net/bug.php?id=76581&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=76581&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=76581&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=76581&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=76581&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=76581&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=76581&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=76581&r=needscript Try newer version: https://bugs.php.net/fix.php?id=76581&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=76581&r=support Expected behavior: https://bugs.php.net/fix.php?id=76581&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=76581&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=76581&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=76581&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=76581&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=76581&r=dst IIS Stability: https://bugs.php.net/fix.php?id=76581&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=76581&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=76581&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=76581&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=76581&r=mysqlcfg