Details
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Bug
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Resolution: Incomplete
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P1: Critical
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5.15.8
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Android,
Windows
Description
When having many (total 4k+ lines of code) connections in a QML file, application starts to crash with the following stack trace:
1 QString::size qstring.h 277 0x7ffff498f92d
2 QConcatenable<QString>::size qstringbuilder.h 269 0x7ffff7a1b954
3 QConcatenable<QStringBuilder<QStringBuilder<QString,QString>,QString>>::size qstringbuilder.h 424 0x7ffff7af06c8
4 QStringBuilder<QStringBuilder<QString,QString>,QString>::convertTo<QString> qstringbuilder.h 111 0x7ffff7b36298
5 QStringBuilder<QStringBuilder<QString,QString>,QString>::operator QString qstringbuilder.h 131 0x7ffff7b3f3bd
6 QV4::Function::updateInternalClass qv4function.cpp 141 0x7ffff7b91a24
7 QQmlBoundSignalExpression::QQmlBoundSignalExpression qqmlboundsignal.cpp 134 0x7ffff7e14801
8 QQmlConnections::connectSignalsToMethods qqmlconnections.cpp 328 0x7ffff7f622c6
9 QQmlConnections::connectSignals qqmlconnections.cpp 280 0x7ffff7f61ec8
10 QQmlConnections::componentComplete qqmlconnections.cpp 389 0x7ffff7f62a49
11 QQmlObjectCreator::finalize qqmlobjectcreator.cpp 1416 0x7ffff7ecb0f3
12 QQmlComponentPrivate::complete qqmlcomponent.cpp 1002 0x7ffff7e01480
13 QQmlComponentPrivate::completeCreate qqmlcomponent.cpp 1093 0x7ffff7e00359
14 QQmlComponent::completeCreate qqmlcomponent.cpp 1080 0x7ffff7dfe392
15 QQmlComponent::create qqmlcomponent.cpp 826 0x7ffff7dfe11e
16 QQmlApplicationEnginePrivate::finishLoad qqmlapplicationengine.cpp 148 0x7ffff7eba1b6
17 QQmlApplicationEnginePrivate::startLoad qqmlapplicationengine.cpp 133 0x7ffff7eb9cd2
18 QQmlApplicationEngine::load qqmlapplicationengine.cpp 287 0x7ffff7eb90ed
19 main main.cpp 28 0x7ff78eb915db
20 WinMain qtmain_win.cpp 97 0x7ff78ebab795
... <More>
QQmlBoundSignalExpression::QQmlBoundSignalExpression method refers to specific slot in the qml file, and after removing certain amount of seemingly random slots, the crash goes away. I could not deduce any logic in why those specific slots crash the application, as changing the amount of parameters and the code in those slots do not help, and also moving the slot code to different portion in code did not help.