Bug #76725 [Opn->Fbk]: Self-referencing constant fatal error in specific case

Edit report at https://bugs.php.net/bug.php?id=76725&edit=1 ID: 76725 Updated by: nikic@php.net Reported by: martin dot ninov at gmail dot com Summary: Self-referencing constant fatal error in specific case -Status: Open +Status: Feedback Type: Bug -Package: *General Issues +Package: Testing related Operating System: Ubuntu16.04 and W10 PHP Version: 7.2.8 Block user comment: N Private report: N New Comment: What exactly is the bug here? That there is no error if the property declaration is removed? Previous Comments: ------------------------------------------------------------------------ [2018-08-09 12:57:21] martin dot ninov at gmail dot com Description: ------------ The test script generates a Fatal error: Uncaught Error: Cannot declare self-referencing constant 'self::FOO' All lines of test script are required, except the last line, which is just there to output something. Removing any of the following eliminates the error: namespace second constant constant assignment I tested on a number on both win10 and linux(ubuntu 16.04), and a number of php 7.2 versions. This: https://3v4l.org/3aIHb says it works on php5.6 versions and fails in php7.0+ Test script: --------------- <?php namespace Waffles; abstract class A { const FOO = self::FOO; const OTHER = 0; private $waf = self::OTHER; } class B extends A { const FOO = 'waffles'; } $foo = new B(); echo $foo::FOO; Expected result: ---------------- waffles Actual result: -------------- Fatal error: Uncaught Error: Cannot declare self-referencing constant 'self::FOO' ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=76725&edit=1