Details
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Bug
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Resolution: Invalid
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P1: Critical
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6.3.0
Description
i'm currently seeing a weird crash happening inside QQmlComponent::setInitialProperties:
to quote address sanitizer
AddressSanitizer:DEADLYSIGNAL ================================================================= ==280167==ERROR: AddressSanitizer: SEGV on unknown address (pc 0x7f3f3b543487 bp 0x7ffeb86f2910 sp 0x7ffeb86f2690 T0) ==280167==The signal is caused by a READ memory access. ==280167==Hint: this fault was caused by a dereference of a high value address (see register values below). Dissassemble the provided pc to learn which register was used. #0 0x7f3f3b543487 in QString::size() const /home/tim/dev/qt6/build_debug_asan/qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qstring.h:413 #1 0x7f3f3b543487 in splitString<QList<QString>, QString> /home/tim/dev/qt6/qtbase/src/corelib/text/qstring.cpp:7629 #2 0x7f3f3b544136 in QString::split(QChar, QFlags<Qt::SplitBehaviorFlags>, Qt::CaseSensitivity) const /home/tim/dev/qt6/qtbase/src/corelib/text/qstring.cpp:7683 #3 0x7f3f3d4196e5 in QQmlComponentPrivate::setInitialProperty(QObject*, QString const&, QVariant const&) /home/tim/dev/qt6/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:381 #4 0x7f3f3d41c565 in QQmlComponent::setInitialProperties(QObject*, QMap<QString, QVariant> const&) /home/tim/dev/qt6/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:1253 #5 0x7f3f3d41c771 in QQmlComponent::createWithInitialProperties(QMap<QString, QVariant> const&, QQmlContext*) /home/tim/dev/qt6/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:892 #6 0x7f3f3d37e0d3 in QQmlApplicationEnginePrivate::finishLoad(QQmlComponent*) /home/tim/dev/qt6/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:155 #7 0x7f3f3d37fcc8 in QQmlApplicationEnginePrivate::startLoad(QUrl const&, QByteArray const&, bool) /home/tim/dev/qt6/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:139 #8 0x7f3f3d380f7f in QQmlApplicationEngine::load(QString const&) /home/tim/dev/qt6/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:306
now the funny part: when examining the stack at `QQmlComponent::setInitialProperties`, the "properties" map looks good. but both name and value seem to be corrupted in `QQmlComponentPrivate::setInitialProperty`
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some observations:
- it works fine if i compile my application code
with clang - both gcc-10 and gcc-11 crash in this location
this is quite surprising to me, as the in both cases qt is compiled with gcc. - the content of the QVariantMap doesn't seem to matter much.
- unfortunately i could not build a test case from scratch
- i'm seeing the same crash on x86_64 and on armv7
makes me wonder how to debug this further ... any ideas?