Bug 38759 – [Qt] Initializing the icon database twice in a row raise an assert

• Status: RESOLVED
• Resolution: WORKSFORME
• Component: WebKit Qt

[Jocelyn Turcotte]

Created attachment 55387 [details]
Test app

See the attached test for a common possible case:

    QWebSettings::enablePersistentStorage();
    QWebSettings::globalSettings()->setIconDatabasePath(".");


When we call QWebSettings::setIconDatabasePath() we don't make sure that the icon database has been closed before opening it again.

There is protection for that in IconDatabase::open() by checking if the sqlite database is open, however it don't work here since the state only change when the database is opened on the spawned thread.

I don't know what happens in release, there might be an opened sqlite database on the first path specified to setIconDatabasePath.

Reproduced on MSVC2008.

[Benjamin Poulain]

Works for me.

Your example crashes because there is no QApplication instance so threads are not working properly. By changing it to:

#include <QApplication>
#include <QWebSettings>

int main(int argc, char** argv)
{
    QApplication app(argc, argv);
    QWebSettings::enablePersistentStorage();
    QWebSettings::globalSettings()->setIconDatabasePath(".");
    return 0;
}

Everything works for me.