View Issue Details

IDProjectCategoryView StatusLast Update
0000893XdebugUncategorizedpublic2017-03-19 22:17
ReporterZobo Assigned Toderick  
Status resolvedResolutionwon't fix 
Product Version2.2.1 
Summary0000893: Callstack invalid when __autoload initiated from class method

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.

TagsNo tags attached.
Operating System
PHP Version5.4.4


has duplicate 0001150 resolvedderick Traces show wrong filenames 



2012-10-12 07:32

reporter (615 bytes)


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


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


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.

Issue History

Date Modified Username Field Change
2012-10-12 07:32 Zobo New Issue
2012-10-12 07:32 Zobo File Added:
2012-10-12 07:33 Zobo Note Added: 0002359
2016-07-31 12:36 derick Category Usage problems => Usage problems (Crashes)
2016-07-31 12:38 derick Category Usage problems (Crashes) => Usage problems (Wrong Results)
2016-11-27 19:01 derick Note Added: 0003796
2016-11-27 19:01 derick Assigned To => derick
2016-11-27 19:01 derick Status new => confirmed
2017-03-19 22:17 derick Note Added: 0004237
2017-03-19 22:17 derick Status confirmed => resolved
2017-03-19 22:17 derick Resolution open => won't fix
2017-03-19 22:17 derick Relationship added has duplicate 0001150
2020-03-12 16:35 derick Category Usage problems (Wrong Results) => Variable Display
2020-03-12 16:38 derick Category Variable Display => Uncategorized