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  1. Qt
  2. QTBUG-40746

Segmentation fault caused by MmRendererPlayerVideoRendererControl during QDeclarativeVideoRendererBackend destruction

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2: Important
    • Resolution: Done
    • Affects Version/s: 5.3.1
    • Fix Version/s: 5.4.0
    • Labels:
      None
    • Environment:
      Makespec:

      qnx-armle-v7-qcc
    • Platform/s:
      QNX
    • Commits:
      8c7cf4af3a7191538d6a83bcd9314b8bc9c0c04a

      Description

      When the QDeclarativeVideoRendererBackend is destroyed, the renderer control surface is set to NULL, on which the MmRendererPlayerVideoRendererControl implementation then attempts to set a QObject property, causing a segmentation fault.

      This behaviour was observed by having a QML Video component on a page loaded by a QML Loader, and then loading a different page in that Loader, causing the QML Video component to be unloaded.

      Stack trace:

      0 QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::data qscopedpointer.h 143 0x7956d52a
      1 qGetPtrHelper<QScopedPointer<QObjectData> > qglobal.h 941 0x7958ec46
      2 QObject::d_func qobject.h 118 0x7958ee68
      3 QObject::setProperty qobject.cpp 3788 0x797916e6
      4 MmRendererPlayerVideoRendererControl::setSurface mmrendererplayervideorenderercontrol.cpp 82 0x7bc6ff10
      5 QDeclarativeVideoRendererBackend::releaseControl qdeclarativevideooutput_render.cpp 122 0x7aff0722
      6 QDeclarativeVideoRendererBackend::~QDeclarativeVideoRendererBackend qdeclarativevideooutput_render.cpp 81 0x7aff041c
      7 QDeclarativeVideoRendererBackend::~QDeclarativeVideoRendererBackend qdeclarativevideooutput_render.cpp 83 0x7aff04e6
      8 QScopedPointerDeleter<QDeclarativeVideoBackend>::cleanup qscopedpointer.h 62 0x7afef6fc
      9 QScopedPointer<QDeclarativeVideoBackend, QScopedPointerDeleter<QDeclarativeVideoBackend> >::reset qscopedpointer.h 157 0x7afef1a6
      10 QDeclarativeVideoOutput::~QDeclarativeVideoOutput qdeclarativevideooutput.cpp 145 0x7afec42c
      11 ?? 0x7b3d4a0c
      12 ?? 0x7b3d4a0c

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            Assignee:
            bweimer Bernd Weimer
            Reporter:
            lgreenway Leigh Greenway
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              Dates

              Created:
              Updated:
              Resolved:

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