Details
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Bug
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Resolution: Unresolved
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P1: Critical
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6.8.0, 6.8.1, 6.8.2
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None
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Linux/X11
Description
Since the update to Qt 6.8, our system tests have been very unstable. Especially when many delegates or components are created and the GC() is running in parallel in the drain step, crashes seem to occur.
Unfortunately I can't generate a simple example, is there any way to better analyze the problem? With libasan or valgrind this was not possible.
#0 0x00007f0716b79b44 in QV4::MarkStack::drain() ()
from /usr/lib64/libQt6Qml.so.6
#1 0x00007f0716ae3ad5 in QV4::WeakValue::markOnce(QV4::MarkStack*) ()
from /usr/lib64/libQt6Qml.so.6
#2 0x00007f0716b00edd in QV4::QObjectWrapper::markWrapper(QObject*, QV4::MarkStack*) ()
from /usr/lib64/libQt6Qml.so.6
#3 0x00007f0716b05758 in QV4::Heap::QObjectWrapper::markObjects(QV4::Heap::Base*, QV4::MarkStack*) ()
from /usr/lib64/libQt6Qml.so.6
#4 0x00007f0716b79b47 in QV4::MarkStack::drain() ()
from /usr/lib64/libQt6Qml.so.6
#5 0x00007f0716ae3ad5 in QV4::WeakValue::markOnce(QV4::MarkStack*) ()
from /usr/lib64/libQt6Qml.so.6
#6 0x00007f0716b00edd in QV4::QObjectWrapper::markWrapper(QObject*, QV4::MarkStack*) ()
from /usr/lib64/libQt6Qml.so.6
#7 0x00007f0716b05758 in QV4::Heap::QObjectWrapper::markObjects(QV4::Heap::Base*, QV4::MarkStack*) ()
from /usr/lib64/libQt6Qml.so.6
#8 0x00007f0716b79ba7 in QV4::MarkStack::drain(QDeadlineTimer) ()
from /usr/lib64/libQt6Qml.so.6
#9 0x00007f0716b7a03d in ?? ()
from /usr/lib64/libQt6Qml.so.6
#10 0x00007f0716b7ab90 in QV4::GCStateMachine::transition() ()
from /usr/lib64/libQt6Qml.so.6
#11 0x00007f071621816c in QObject::event(QEvent*) ()
from /usr/lib64/libQt6Core.so.6
#12 0x00007f07187621c6 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
()
from /usr/lib64/libQt6Widgets.so.6
#13 0x00007f07161c3568 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
()
from /usr/lib64/libQt6Core.so.6
#14 0x00007f07161c6fe7 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) ()
from /usr/lib64/libQt6Core.so.6
#15 0x00007f07164932b7 in ?? ()
from /usr/lib64/libQt6Core.so.6
#16 0x00007f071402e5ab in g_main_context_dispatch ()
from /usr/lib64/libglib-2.0.so.0
#17 0x00007f071402e858 in ?? ()
from /usr/lib64/libglib-2.0.so.0
#18 0x00007f071402e90f in g_main_context_iteration ()
from /usr/lib64/libglib-2.0.so.0
#19 0x00007f071649295e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib64/libQt6Core.so.6
#20 0x00007f07161cfbba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib64/libQt6Core.so.6
#21 0x00007f07161cb99d in QCoreApplication::exec() ()
from /usr/lib64/libQt6Core.so.6
The problem is gone with setting:
export QV4_GC_TIMELIMIT=0
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Issue Links
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- Reported
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