Details
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Bug
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Resolution: Duplicate
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P2: Important
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None
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5.5.0 Alpha
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None
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Visual Studio 2015, Qt 5.5.0 Beta Snapshot.
Description
switch (value.type()) {
...
<SNIP>
...
case Value::Managed_Type:
Q_ASSERT(value.isString());
return engine->newStringObject(value);
in qv4runtime.cpp.
Our application is hitting this assert during a setSource() on a qquickwidget. Unfortunately it appears like the stack is being corrupted during this operation as seen below:
Qt5Cored.dll!qt_message_fatal(QtMsgType __formal, const QMessageLogContext & context, const QString & message) Line 1568 C++ Qt5Cored.dll!QMessageLogger::fatal(const char * msg, ...) Line 777 C++ Qt5Cored.dll!qt_assert(const char * assertion, const char * file, int line) Line 2895 C++ > Qt5Qmld.dll!QV4::RuntimeHelpers::convertToObject(QV4::ExecutionEngine * engine, const QV4::Value & value) Line 439 C++ Qt5Qmld.dll!QV4::Runtime::getProperty(QV4::ExecutionEngine * engine, const QV4::Value & object, int nameIndex) Line 679 C++ 0000005d15700f4e() Unknown 0000005d12c7b900() Unknown 0000005d13da13c0() Unknown 0000005d00000083() Unknown Qt5Qmld.dll!QV4::Debugging::DebuggerBreakPoint::~DebuggerBreakPoint(void) Unknown 0000005d13da13a0() Unknown Qt5Qmld.dll!QV4::Scope::alloc(int nValues) Line 91 C++
This was not happening in Qt 5.4. The qml behind this setsource is quite complicated, and has numerous context properties and enums registered to it. I attempted to reduce it to a minimal test case but haven't had any luck recreating the problem yet.
Interestingly enough I can avoid the problem by changing to the following inside one of the dependent qml files:
Original:
ColumnLayout{
Label {
...
}
TextField {
...
}
}
to:
ColumnLayout{
Label {
...
}
TextInput {
...
}
}
but I feel like this is a red herring and just avoiding the problem rather it being the problem (as I can't recreate this behaviour in a smaller example!).
This happens in beta snapshot:
qt-opensource-windows-x86-msvc2013_64-5.5.0-beta_2015-05-04_14-59-56-35.exe
Attachments
Issue Links
- duplicates
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- Closed
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