Bug #80821 [NEW]: ReflectionProperty::getDefaultValue() returns current value for statics

From: dktapps at pmmp dot io Operating system: Linux PHP version: 8.0.2 Package: Reflection related Bug Type: Bug Bug description:ReflectionProperty::getDefaultValue() returns current value for statics Description: ------------ When OPcache is not present, default_static_members_table gets written to directly instead of being copied. I'm not sure why this is; at best it seems like a premature optimisation, especially considering that OPcache should be used in the 99% case. This problem has plagued ext-pthreads and other threading extensions for many years (since even before PHP 7.0), creating inconsistencies of behaviour when OPcache is used, vs when it is not. This can finally be seen in userland in PHP 8.0 with the script below, which demonstrates the problem using reflection. Side note: A similar problem/inconsistency also exists with function static_variables, but these can't be inspected using reflection, since PHP doesn't offer any reflection API to see the default values of static variables. (This is primarily a problem for ext-pthreads class copying.) Test script: --------------- <?php class Statics{ public static $staticVar = 1; } Statics::$staticVar = 2; $reflect = new \ReflectionClass(Statics::class); $prop = $reflect->getProperty("staticVar"); var_dump($prop->getDefaultValue()); Expected result: ---------------- int(1) Actual result: -------------- WITH OPcache: int(1) WITHOUT OPcache: int(2) -- Edit bug report at https://bugs.php.net/bug.php?id=80821&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80821&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80821&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80821&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80821&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80821&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80821&r=support Expected behavior: https://bugs.php.net/fix.php?id=80821&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80821&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80821&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80821&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80821&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80821&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80821&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80821&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80821&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80821&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80821&r=mysqlcfg