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  1. Qt
  2. QTBUG-63844

Crash in QMetaObject::activate()

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    Description

      In particular scenario in QML application we often catch a crash (not every time).

      Scenario includes:

      • using Loader QML component to load and unload our QML views
      • our QML views contain animations:
        a. SequentialAnimation: NumberAnimation, PauseAnimation { duration: 400 }, NumberAnimation
        b. NumberAnimation
        c. ParallelAnimation (with 2 PropertyAnimations)

      This is a proprietary software, so we could not share the code. Maybe later we will be managed to prepare some demo application which reproduces the issue, but we hope that currently provided information will be enough to start investigation on your side.

      Issue and stack trace are quite similar to the crash described in QTBUG-43210.

      Stack trace:

      Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000007f7ba9e2a4 in QMetaObject::activate(QObject, int, int, void*) ()
   from /usr/lib/libQt5Core.so.5
[Current thread is 1 (LWP 1256)]
(gdb) bt full
#0  0x0000007f7ba9e2a4 in QMetaObject::activate(QObject, int, int, void*) ()
   from /usr/lib/libQt5Core.so.5
No symbol table info available.
#1  0x0000007f7c00cf58 in QAbstractAnimationJob::stateChanged(QAbstractAnimation
Job::State, QAbstractAnimationJob::State) () from /usr/lib/libQt5Qml.so.5
No symbol table info available.
#2  0x0000007f7c00d880 in QAbstractAnimationJob::setState(QAbstractAnimationJob:
:State) () from /usr/lib/libQt5Qml.so.5
No symbol table info available.
#3  0x0000007f7c00dbac in QAbstractAnimationJob::setCurrentTime(int) ()
   from /usr/lib/libQt5Qml.so.5
No symbol table info available.
#4  0x0000007f7c00ddb4 in QQmlAnimationTimer::updateAnimationsTime(long long)
    () from /usr/lib/libQt5Qml.so.5
No symbol table info available.
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

      Attachments

        1. qt_animation_crash.zip
          4 kB
          Eugeny Novikov
        2. main.qml
          0.8 kB
          Lars Knoll

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-43210 Qt Quick crashes in QAbstractAnimationJob::stateChanged

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
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              laknoll Lars Knoll
              enovikov Eugeny Novikov
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              Dates

                Created:
                Updated:
                Resolved:

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