0001181: Derived class with __get gets called on fetching base class private property

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Date Submitted

Last Update

0001181

Xdebug

(No Category)

public

2015-08-25 18:47

2015-12-07 11:32

Reporter

Blizz

Assigned To

derick

Priority

normal

Severity

crash

Reproducibility

always

Status

closed

Resolution

fixed

Platform

Mac

MacOS

OS Version

10.10.4

Product Version

2.3.3

Target Version

2.4.1

Fixed in Version

2.4.0rc2

Summary

0001181: Derived class with __get gets called on fetching base class private property

Description

Yii2's __get() implementation throws an exception when __get is called with a non-existing $name. It seems that XDebug calls the __get function to obtain the value for a private variable of the base class and the resulting exception is not caught.

Possibly related: Clicking open a Closure also results in an similar exception ("Closue object cannot have properties"). Please let me know if you would like an extra ticket for that.

Code example (no dependencies):
<?php

class BaseClass {
    protected $protected = [1, 2, 3];
    private $private = ['a', 'b', 'c'];
}

class DerivedClass extends BaseClass {
    function __get($name)
    {
        throw new \Exception('Derived class getter called with: ' . $name);
    }
}

try {
    $test = new DerivedClass();
    echo "Statement to break on."; // Breakpoint here
}
catch (\Exception $e) {
    echo $e->getMessage();
}

Steps To Reproduce

Set the breakpoint, start the session and when the breakpoint hits, open up the $test variable. In the test variable, click open *BaseClass*private.
After this, do a step over. It will jump into the catch handler.

Additional Information

Reported in https://youtrack.jetbrains.com/issue/WI-28237 [^] and per your instructions duplicated here. A screencast of the behavior can be found there as well.

Jetbrains reports that it is not reproducible in 2.3.2 but it is in 2.3.3, haven't tried to confirm this.

Direct links:
Screencast: https://youtrack.jetbrains.com/_persistent/Exception.mov?file=74-250258&v=0&c=true [^]
Source file: https://youtrack.jetbrains.com/_persistent/test.php?file=74-250259&v=0&c=true [^]

Tags

No tags attached.

Operating System

Centos 7.1

PHP Version

5.6.0-5.6.4

Attached Files

xdebug.log [^] (35,204 bytes) 2015-08-25 18:47

test.php [^] (391 bytes) 2015-08-25 19:01

Relationships

Notes
(0003256) derick (administrator) 2015-11-22 15:39	Fixed in 2.4.0. Thanks for the report! I would indeed like a separate issue for the closure issue - unless that got fixed with this bug fix of course.

Issue History
Date Modified	Username	Field	Change
2015-08-25 18:47	Blizz	New Issue
2015-08-25 18:47	Blizz	File Added: xdebug.log
2015-08-25 19:01	Blizz	File Added: test.php
2015-11-20 17:59	derick	Target Version	=> 2.4.1
2015-11-22 15:39	derick	Note Added: 0003256
2015-11-22 15:39	derick	Status	new => closed
2015-11-22 15:39	derick	Assigned To	=> derick
2015-11-22 15:39	derick	Resolution	open => fixed
2015-11-22 15:39	derick	Fixed in Version	=> 2.4.0
2015-12-07 11:32	derick	Fixed in Version	2.4.0 => 2.4.0rc2
2016-07-31 13:35	derick	Category	Debug client (console) => debugclient (debugging tool)
2016-07-31 13:35	derick	Category	debugclient (debugging tool) => (No Category)