[Webkit-unassigned] [Bug 50892] New: [Qt][WK2] Crash in WebPage constructor.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=50892

           Summary: [Qt][WK2] Crash in WebPage constructor.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: kbalazs at webkit.org


WebPage initializing it's Page with a PageClients with zero DeviceMotionClient* that leads to 
zero pointer dereference. This is how Page using the clients:
#if ENABLE(DEVICE_ORIENTATION)
    , m_deviceMotionController(RuntimeEnabledFeatures::deviceMotionEnabled() ? new DeviceMotionController(pageClients.deviceMotionClient) : 0)
    , m_deviceOrientationController(RuntimeEnabledFeatures::deviceOrientationEnabled() ? new DeviceOrientationController(this, pageClients.deviceOrientationClient) : 0)
#endif

That means the correct fix is to disable the device motion and orientation features at runtime. The WebPage contructor also needs a fix for consistency with the enable flags but that should be done in a different patch.

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