The VideoLAN Forums

Posted: **05 Apr 2011 08:47**

I open vlc in the following details:

- Open terminal
- Type vlc, it open vlc gui application
- Select a file to play by File > Open File ... (my example is a .mov file)

When I click 'Close button' it show the following error message in Terminal:

Code: Select all

Program received signal SIGSEGV, Segmentation fault.
0x0000003cc8040e8b in ?? () from /usr/lib64/libQtDBus.so.4

Backtrace when I run vlc in gdb

Code: Select all

Program received signal SIGSEGV, Segmentation fault.
0x0000003cc8040e8b in ?? () from /usr/lib64/libQtDBus.so.4
(gdb) bt
#0  0x0000003cc8040e8b in ?? () from /usr/lib64/libQtDBus.so.4
#1  0x0000003cc80411d5 in ?? () from /usr/lib64/libQtDBus.so.4
#2  0x0000003cc097004f in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#3  0x0000003cc097055f in QObject::destroyed(QObject*) () from /usr/lib64/libQtCore.so.4
#4  0x0000003cc0972967 in QObject::~QObject() () from /usr/lib64/libQtCore.so.4
#5  0x0000003f7df7dea9 in KIO::Scheduler::~Scheduler() () from /usr/lib64/libkio.so.5
#6  0x0000003f7df832db in ?? () from /usr/lib64/libkio.so.5
#7  0x0000003cbc4369f1 in exit () from /lib64/libc.so.6
#8  0x0000003cbc41ee64 in __libc_start_main () from /lib64/libc.so.6
#9  0x0000000000401039 in ?? ()
#10 0x00007fffffffe128 in ?? ()
#11 0x000000000000001c in ?? ()
#12 0x0000000000000001 in ?? ()
#13 0x00007fffffffe438 in ?? ()
#14 0x0000000000000000 in ?? ()
(gdb)

My computer details:
Fedora 14, KDE 4.6.1, Qt 4.7.1

I think this is a bug in VLC program, ...

Posted: **05 Apr 2011 09:56**

Known KDE bug :
http://bugs.kde.org/show_bug.cgi?id=199375

Posted: **05 Apr 2011 12:51**

I think this is a bug in Qt Module. The Qt frameworks destroy all of child widgets automatically, so if you have code like this:

Code: Select all

/**
 * QObject in this code can be: QWidget, QList, and etc.
 */

//In parent Object or main code
QObject sObject(...);
QObject* object;
object = &sObject;

//and some where we change parent of object
object.setParent(mainObject);
//OR
layout->addWidget(object);

The code is exactly correct and does not have problem in pure C++, but in Qt will cause segment fault like above.

Posted: **05 Apr 2011 15:50**

The crash occur in the destructor of a static C++ object from KDE. This cannot be a bug in the Qt module.
https://bugs.kde.org/show_bug.cgi?id=234484

Posted: **22 Aug 2013 00:17**

still happens in vlc from git under kde 4.11

Posted: **22 Aug 2013 18:31**

Well, KDE people blamed the bug on QtDbus, and QtDbus people never bothered to fix it.

Complaining here will not solve anything, I am afraid.

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