Bug 79019 – Webkit Crashes on youtube when connected to ProgressBar

• Component: WebKit Qt
• Status: RESOLVED INVALID

[Marcin]

Created attachment 127781 [details]
Backtrace

Our web browser based on QtWebkit sometimes crashes on youtube when i connect Signal loadProgress to QProgressBar. 
It has something to do with google ads because i can reproduce crash in arora browser only if AdBlock is disabled.
Today i can reproduce crash on http://www.youtube.com/watch?v=Hpn9y_erKgk . 
In firefox i see ad in right part of this webpage, but QtWebkit based browser crasher before this is loaded.


Example code:
    QWebView *view = new QWebView();
    view->load(QUrl("http://www.youtube.com/watch?v=Hpn9y_erKgk")); //on this webpage i can reproduce crash

    QProgressBar *progress = new QProgressBar();
    progress->setRange(0, 100);
    connect(view->page(), SIGNAL(loadProgress(int)), progress, SLOT(setValue(int))); //if I comment this line app will not crash

    QVBoxLayout *layout = new QVBoxLayout();
    layout->addWidget(view);
    layout->addWidget(progress);
    setLayout(layout);

Backtrace:
In attachment


Platform:
Windows 7, Qt 4.8.0

[Marcin]

To reproduce this crash You should also enable plugins.
QWebSettings::globalSettings()->setAttribute(QWebSettings::PluginsEnabled, true);

[Alexey Proskuryakov]

The Qt port has been removed from WebKit, resolving this bug.