0001166: Using $this in __debugInfo() causes infinite recursion (Doesn't appear to be the same as issue #00001140)

View Issue Details [ Jump to Notes ]

[ Issue History ] [ Print ]

Project

Category

View Status

Date Submitted

Last Update

0001166

Xdebug

Usage problems (Wrong Results)

public

2015-06-22 22:13

2015-11-05 15:13

Reporter

plankmeister

Assigned To

derick

Priority

high

Severity

major

Reproducibility

always

Status

closed

Resolution

fixed

Platform

OS Version

Product Version

Target Version

Fixed in Version

2.4.0beta1

Summary

0001166: Using $this in __debugInfo() causes infinite recursion (Doesn't appear to be the same as issue 0001140)

Description

When debugging with Xdebug 2.3.3 on PHP 5.6.9, stepping into an object that has a defined __debugInfo() method that refers to $this causes an uncaught LogicException; 'The object is in an invalid state as the parent constructor was not called'
When single-stepping, the moment the first expression in the constructor is stepped into, execution skips to the __debugInfo() method, where it dies upon encountering $this.

Steps To Reproduce

php -dxdebug.auto_trace=1 -dxdebug.collect_params=3 -r 'class Foo extends IteratorIterator{function __construct($items){if(is_array($items)){$items=new ArrayIterator($items);}}function __debugInfo(){return ["count"=>iterator_count($this)];}};$a=new Foo([1,2,3]);var_dump($a);'

Additional Information

Output extract:

PHP Stack trace:
PHP 1. {main}() Command line code:0
PHP Warning: Uncaught exception 'LogicException' with message 'The object is in an invalid state as the parent constructor was not called' in Command line code:1
Stack trace:
#0 [internal function]: IteratorIterator->rewind()
#1 Command line code(1): iterator_count(Object(Foo))
0000002 [internal function]: Foo->__debugInfo()
0000003 [internal function]: IteratorIterator->rewind()
0000004 Command line code(1): iterator_count(Object(Foo))
0000005 [internal function]: Foo->__debugInfo()
0000006 [internal function]: IteratorIterator->rewind()
0000007 Command line code(1): iterator_count(Object(Foo))
0000008 [internal function]: Foo->__debugInfo()
0000009 [internal function]: IteratorIterator->rewind()
0000010 Command line code(1): iterator_count(Object(Foo))
0000011 [internal function]: Foo->__debugInfo()
0000012 [internal function]: IteratorIterator->rewind()
0000013 Command line code(1): iterator_count(Object(Foo))
0000014 [internal function]: Foo->__debugInfo()
0000015 [internal function]: IteratorIterator->rewind()
0000016 Command line code(1): iterator_count(Object(Foo))
0000017 [internal fu in Command line code on line 1

Tags

No tags attached.

Operating System

Debian GNU/Linux 7.8 (wheezy)

PHP Version

5.5.15-5.5.19

Attached Files

Relationships

Notes
(0003127) plankmeister (reporter) 2015-06-22 22:16	The actual Class in production code that produces the issue is https://github.com/cakephp/cakephp/blob/3.1/src/Collection/Collection.php [^] if the context is important.

(0003138) derick (administrator) 2015-06-25 14:43	Thanks - I can reproduce this with your reproduce script. Thanks for making it so short! I'll have a look.

(0003142) derick (administrator) 2015-06-28 16:11	Fixed for 2.3.4 and 3.0dev

Issue History
Date Modified	Username	Field	Change
2015-06-22 22:13	plankmeister	New Issue
2015-06-22 22:16	plankmeister	Note Added: 0003127
2015-06-25 14:43	derick	Note Added: 0003138
2015-06-28 16:11	derick	Note Added: 0003142
2015-06-28 16:11	derick	Status	new => closed
2015-06-28 16:11	derick	Assigned To	=> derick
2015-06-28 16:11	derick	Resolution	open => fixed
2015-06-28 16:11	derick	Fixed in Version	=> 2.3.4
2015-11-05 15:08	derick	Fixed in Version	2.3.4 => 2.4.0beta1
2015-11-05 15:13	derick	Category	Debug client (console) => Usage problems
2016-07-31 13:36	derick	Category	Usage problems => Usage problems (Crashes)
2016-07-31 13:38	derick	Category	Usage problems (Crashes) => Usage problems (Wrong Results)