path: root/src/qml/jsruntime/qv4engine.cpp
diff options
authorSimon Hausmann <>2018-05-23 12:55:11 +0200
committerSimon Hausmann <>2018-05-23 11:06:34 +0000
commit60176efa7843fda048b2eb5d347fab0dd991e26d (patch)
tree4903b088cdaec40fdec6e040d4fdd96037340eda /src/qml/jsruntime/qv4engine.cpp
parenteaec83583fff3e3bf431f6179936b84f4acca553 (diff)
Fix crash when incubating objects with non-existent initial properties
When incubation is triggered from C++ and reaches the state of setting the initial properties (as supplied to incubateObject), we'd set engine->currentStackFrame to a CppStackFrame that provides access to the correct QML context. As we're not called from the interpreter, the v4Function pointer would be a null pointer. If during the initial property setting an exception is thrown (due to non-existent property access) and a back-trace is created, we'd end up dereferencing v4Function. Change-Id: I7f6b0ba7893bfb4186f55d4c213b4bb602d29aa0 Task-number: QTBUG-68416 Reviewed-by: Lars Knoll <>
Diffstat (limited to 'src/qml/jsruntime/qv4engine.cpp')
1 files changed, 5 insertions, 2 deletions
diff --git a/src/qml/jsruntime/qv4engine.cpp b/src/qml/jsruntime/qv4engine.cpp
index 5521633db7..835933c043 100644
--- a/src/qml/jsruntime/qv4engine.cpp
+++ b/src/qml/jsruntime/qv4engine.cpp
@@ -769,16 +769,19 @@ QQmlContextData *ExecutionEngine::callingQmlContext() const
QString CppStackFrame::source() const
- return v4Function->sourceFile();
+ return v4Function ? v4Function->sourceFile() : QString();
QString CppStackFrame::function() const
- return v4Function->name()->toQString();
+ return v4Function ? v4Function->name()->toQString() : QString();
int CppStackFrame::lineNumber() const
+ if (!v4Function)
+ return -1;
auto findLine = [](const CompiledData::CodeOffsetToLine &entry, uint offset) {
return entry.codeOffset < offset;