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Subject: I this a bug in PHP 7.1.9?
From: jgmdev@gmail.com (Jefferson Gonzalez)

I upgraded my PHP version on a server from 7.0 to latest 7.1.9 and got 
this strange behaviour, did something changed on the core language or is 
this a bug?

PHP sample code:
------------------------------------------
<?php

function test()
{
   static $staticValue = test2();

   return $staticValue;
}

function test2()
{
   return array();
}

print_r(test());

------------------------------------------

Output:

PHP Fatal error:  Constant expression contains invalid operations in 
test.php on line 5

Fatal error: Constant expression contains invalid operations in test.php 
on line 5