Bug #76451 [NEW]: Aliases during inheritance type checks affected by opcache

From: nikic Operating system: PHP version: master-Git-2018-06-11 (Git) Package: Scripting Engine problem Bug Type: Bug Bug description:Aliases during inheritance type checks affected by opcache Description: ------------ If type-equality checks during inheritance fail on simple string comparison, they fall back to loaded the class entries and comparing those. This allows aliased classes to pass inheritance checks. However, if classes are early-bound, then the alias will not be available if opcache is used, as compilation is isolated. The attached test script will work without opcache and fail with opcache. Test script: --------------- // file1.php <?php class Foo {} class_alias('Foo', 'Bar'); require __DIR__ . '/file2.php'; // file2.php <?php class A { public function test(Foo $foo) {} } class B extends A { public function test(Bar $foo) {} } Expected result: ---------------- No error. Actual result: -------------- Warning: Declaration of B::test(Bar $foo) should be compatible with A::test(Foo $foo) -- Edit bug report at https://bugs.php.net/bug.php?id=76451&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=76451&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=76451&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=76451&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=76451&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=76451&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=76451&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=76451&r=needscript Try newer version: https://bugs.php.net/fix.php?id=76451&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=76451&r=support Expected behavior: https://bugs.php.net/fix.php?id=76451&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=76451&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=76451&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=76451&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=76451&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=76451&r=dst IIS Stability: https://bugs.php.net/fix.php?id=76451&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=76451&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=76451&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=76451&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=76451&r=mysqlcfg