It would be great, if you could follow the instructions at https://xdebug.org/support.php#remote - it would help greatly improve chances of me finding and fixing this bug.

sorry for delay!
test script and log file in attach subject
<?php
class Session {

protected static $iterations = array();

static public function getInst($params = array()) {
    $iteration = $params['iteration'];

    if (!isset(self::$iterations[$iteration])) {
        self::$iterations[$iteration] = new self($params);
    }

    return self::$iterations[$iteration];
}

public function __construct($param) {
    $this->params = $param;
}

}

$sess = Session::getInst(array('iteration' => 'start', 'param1' => 'param1', 'param2' => 'param2', 'param3' => 'param3'));

I've tried reproducing this, but the line numbers in the log file do not seem to match the line numbers in the attached (or copied) file. The log refers to line 34, whereas the file only has 23 lines. Can you please attach a matching file / log combination?

attached two files "NEW_ *"
breakpoint on line 23
NetBeans: step-by-step "F7", error on line 10!

ok?

Hi, Derick!
you find the opportunity to correct this error?
or advise a method of operating and tracking this type of data

Sorry - I haven't had the time yet!

I've attached another log. The script used to generate it can be found at the bottom of the file.

I'm currently running three different servers with three different Xdebug versions:.

Working:
XAMPP with Xdebug v2.2.5 (PHP 5.6.24)

Not working:
Debian 8 with Xdebug v2.4.1 (PHP 5.6.27-0+deb8u1)
Ubuntu 14.04 with Xdebug v2.3.3 (PHP 5.6.20-1+deb.sury.org~trusty+1)

No Docker used for the Linux servers, just old fashioned installs, but they are both running on VirtualBox VMs.

EDIT:
I rolled back my Debian install to v2.2.5 as that version's working in XAMPP; it doesn't work in Debian, at least with the PHP version specified above. Also tried the 2.5RC, just in case, but unsurprisingly no joy there either.

I am reasonable certain that this issue is actually this bug in PHP: https://bugs.php.net/bug.php?id=73545

It would be great if you could try it with the PHP-5.6 branch of PHP (from Git), or any version after 5.6.28 (I realize, that's not released yet).

I use the following version:
PHP 5.5.35 (cli) (built: May 13 2016 21:29:21)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2015 Zend Technologies
with Xdebug v2.4.1, Copyright (c) 2002-2016, by Derick Rethans

PHP 5.6.21 (cli) (built: May 13 2016 21:32:38)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
with Xdebug v2.4.1, Copyright (c) 2002-2016, by Derick Rethans

PHP 7.0.6 (cli) (built: May 13 2016 21:35:53) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
with Xdebug v2.4.1, Copyright (c) 2002-2016, by Derick Rethans

7th version about a mistake or anything I can not tell, but in the previous two, it is (((

Neither 5.5.35 or 5.6.21 are released after 5.6.28, so it's not a surprise they don't have it fixed. You need to wait for 5.6.29 (coming out this week hopefully) in order to verify this bug.

Closing this, as this was likely the PHP issue linked to in an earlier comment.