Req #72059 [NEW]: ?? is not allowed on constant expressions

From: marcio Operating system: PHP version: 7.0.6RC1 Package: *General Issues Bug Type: Feature/Change Request Bug description:?? is not allowed on constant expressions Description: ------------ The null coalescing operator (??) is not supported on constant expressions https://3v4l.org/ANcaQ Test script: --------------- <?php new class { private $x = null ?? 'foo'; }; Expected result: ---------------- No errors. Actual result: -------------- Fatal error: Constant expression contains invalid operations in {file} on line {line} Process exited with code 255. -- Edit bug report at https://bugs.php.net/bug.php?id=72059&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=72059&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=72059&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=72059&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=72059&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=72059&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=72059&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=72059&r=needscript Try newer version: https://bugs.php.net/fix.php?id=72059&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=72059&r=support Expected behavior: https://bugs.php.net/fix.php?id=72059&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=72059&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=72059&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=72059&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=72059&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=72059&r=dst IIS Stability: https://bugs.php.net/fix.php?id=72059&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=72059&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=72059&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=72059&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=72059&r=mysqlcfg