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Details

Type: Bug
Resolution: Fixed
Priority: P1: Critical
Fix Version/s: 5.14
Affects Version/s: 5.9.0, 5.9.1, 5.9.2, 5.10.0 Beta 2, 5.12.0
Component/s: Quick: Particles
Labels:
- CustomerRequirement
- reported_by_support_standard
Environment:

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Any standard system env.

All OS tested: Win 7 x32, Win7 x64, MAC OS, Ubuntu x64, QNX x84-64

With all compilers: MSVC x32 2015 x64 2015-2017, MINGW

test code to reproduce is attached

Show
Any standard system env. All OS tested: Win 7 x32, Win7 x64, MAC OS, Ubuntu x64, QNX x84-64 With all compilers: MSVC x32 2015 x64 2015-2017, MINGW test code to reproduce is attached

Description

Application enters the infinite loop.

Valgrind shows no memory errors (leakages).

Call stack (GDB Ubuntu x64):

1   QHashData::allocateNode(int)                                                           0x5d5db8c  
 2   QQuickParticleDataHeap::insertTimed(QQuickParticleData *, int)                         0x1e58b8f8 
 3   QQuickParticleGroupData::recycle()                                                     0x1e58bd8f 
 4   QQuickParticleSystem::updateCurrentTime(int)                                           0x1e58f885 
 5   QAbstractAnimation::setCurrentTime(int)                                                0x5ce5b6f  
 6   QUnifiedTimer::updateAnimationTimers(long long)                                        0x5ce5e6d  
 7   QAnimationDriver::advanceAnimation(long long)                                          0x5ce6a8c  
 8   QObject::event(QEvent *)                                                               0x5f0a77b  
 9   QApplicationPrivate::notify_helper(QObject *, QEvent *)                                0x4f8d5ec  
 10  QApplication::notify(QObject *, QEvent *)                                              0x4f94a17  
 11  QCoreApplication::notifyInternal2(QObject *, QEvent *)                                 0x5edf2b8  
 12  QTimerInfoList::activateTimers()                                                       0x5f3108e  
 13  ??                                                                                     0x5f318a9  
 14  g_main_context_dispatch                                                                0xaa81197  
 15  ??                                                                                     0xaa813f0  
 16  g_main_context_iteration                                                               0xaa8149c  
 17  QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)             0x5f31baf  
 18  QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)                                0x5edd8aa  
 19  QCoreApplication::exec()                                                               0x5ee6134  
 20  main                                                                       main.cpp 24 0x400ee7   
 ... <More>

In my and test app this infinite loop usually between

QHashData::allocateNode(int) and

QQuickParticleDataHeap::insertTimed(QQuickParticleData *, int)

every n loops 2 more functions are called:

QQuickParticleGroupData::recycle()

QHashData:: detach_helper

So because of this bug I cannot release my applicaion. Because I use particle system for the infinite flows visualisation.

I have reproduced this bug in my app in all OS indicated below. I have written a simple QML app that reproduced this bug. Run it on Win7x64, Ubuntu x 64

It stops responding in about 10hrs.

I believe that if You uncomment setting OPENGL software mode, the app stops responding in 4 hrs.

MAC OS, Win 7 x32, Win7 x64, Ubuntu x64