0000893: Callstack invalid when __autoload initiated from class method - MantisBT

ID	Project	Category	View Status	Date Submitted	Last Update
0000893	Xdebug	Uncategorized	public	2012-10-12 07:32	2017-03-19 22:17

Reporter	Zobo	Assigned To
Priority	normal	Severity	minor	Reproducibility	always
Status	resolved	Resolution	won't fix
Product Version	2.2.1

Summary	0000893: Callstack invalid when __autoload initiated from class method
Description	If __autoload is called as a result of accessing an unknown class from within a class method (static or instance - clazz::doSomething() or $inst->doSomething()), the call stack will have wrong file name one depth just below the autoload call. Expected result (note filename on second line): 0: __autoload() at autoload.php:6 1: wrap->doIt() at autoload.php:17 2: {main}() at index.php:6 Actual result (note filename on second line): 0: __autoload() at autoload.php:6 1: wrap->doIt() at index.php:17 2: {main}() at index.php:6
Steps To Reproduce	Attached package contains 3 files: index.php - entry point, execute this file. Calls the class member that will create a new class that needs to be autoloaded. autoload.php - contains the __autoload and the class method that will trigger autoload. class.Test.php - The autoloaded class (just so that the whole script can execute, no other meaning) __autoload() contains an xdebug_break() at the location where the issue is first visible.
Additional Information	This is reproducible with php5.4.5/xdebug2.2.1 and php5.3.3-7+squeeze14/xdebug2.2.1. The issue is a bit different when tested with php5.3.3-7+squeeze14/xdebug2.1.0. There the the stack depths in question have correct filename, but lineno is 0.
Tags	No tags attached.

Operating System
PHP Version	5.4.4

Zobo 2012-10-12 07:33 reporter ~0002359	Forgot OS: php5.4.5/xdebug2.2.1 was tested on Win7, PHP CLI php5.3.3-7+squeeze14/* was tested on Debian Linux, PHP CGI

derick 2016-11-27 19:01 administrator ~0003796	I can still reproduce this with Xdebug 2.5, by adding the "xdebug_print_function_Stack()" on the place where you have the xdebug_break(): Xdebug: user triggered in /home/derick/Downloads/autoload.php on line 6 Call Stack: 0.0002 267680 1. {main}() /home/derick/Downloads/index.php:0 0.0004 275384 2. wrap->doIt2() /home/derick/Downloads/index.php:6 0.0004 276280 3. __autoload($clazz = 'Test') /home/derick/Downloads/index.php:18 0.0005 276400 4. xdebug_print_function_stack() /home/derick/Downloads/autoload.php:6

derick 2017-03-19 22:17 administrator ~0004237	This is indeed a bug in Xdebug with PHP 5, but it works fine with PHP 7.0 and 7.1. As this is not a critical bug, I won't be fixing it.