qDebug / console.log output missing on iOS

Possibly introduced with this recent fix: https://bugs.archlinux.org/task/40583

There is no log output shown in Application Output when using qDebug() << "test" or console.log ("test" ) in a Qt Quick application. The app is run on an iOS simulator on a Mac with OSX 10.10 and the latests version of XCode installed.

I'd expect something in the output or even in the simulator system.log file, but nothing is shown. I've tried setting QT_LOGGING_TO_CONSOLE=1 environment variable, or adding OUTPUT += Console to my .pro file. I've even tried overriding the default message handlers for the app, but still can't get any logging output. No logs for qDebug(), std::cout or std::cerr is shown.