Fatal assertion in maybeBreakAtInstruction when breakpoint near a try/catch block

This is a regression I observed in QtCreator 3.1.2. It does not occur in 3.0.1.

ASSERT:​ "​context-​>type == QV4:​:​ExecutionContext:​:​Type_​GlobalContext"​ in file jsruntime\​qv4debugging.​cpp,​ line 522

The line of code is this:
Q_ASSERT(context->type == QV4::ExecutionContext::Type_GlobalContext);
When I first hit this problem, the value of context->type is actually “Type_CatchContext”. My breakpoint was not actually in a catch block but it was indeed in a try block, inside of a Component.onCompleted function.

Once I hit that assertion, QtCreator cannot continue debugging. I have to force-quit my app. Without any try/catch, the error never happens. The funny part is that the breakpoint doesn't need to be in the try/catch, but just in the same file.

Steps to create a project that reproduces:
1) File > New
2) Applications > Qt Quick Application, Choose...
3) Give it a simple name, Continue
4) Select Qt Quick 2.2
5) Select the built-in (e.g. "Desktop Qt 5.3 clang 64bit") bundled with Qt Creator
6) Add the following to the default main.qml:
Component.onCompleted: {
console.log("before try");
try

catch (e)

}
7) In project screen, uncheck C++ debugging, check QML debugging
8) Put a breakpoint anywhere in main.qml
9) Start debugging (Cmd-Y)

Observed: Crashes at maybeBreakAtInstruction

0 QV4::Debugging::Debugger::maybeBreakAtInstruction() QV4::Debugging::Debugger::maybeBreakAtInstruction() 0x1066a158e
1 QV4::Moth::VME::run(QV4::ExecutionContext*, unsigned char const*, void**) QV4::Moth::VME::run(QV4::ExecutionContext, unsigned char const*, void***) 0x10670be63
2 QV4::Moth::VME::exec(QV4::ExecutionContext*, unsigned char const*) QV4::Moth::VME::exec(QV4::ExecutionContext*, unsigned char const*) 0x10670bfe2
3 QV4::ScriptFunction::call(QV4::Managed*, QV4::CallData*) QV4::ScriptFunction::call(QV4::Managed*, QV4::CallData*) 0x1066c44e7
4 QQmlJavaScriptExpression::evaluate(QQmlContextData*, QV4::ValueRef, QV4::CallData*, bool*) QQmlJavaScriptExpression::evaluate(QQmlContextData*, QV4::ValueRef, QV4::CallData*,
bool*) 0x10679f341
5 QQmlBoundSignalExpression::evaluate(void*) QQmlBoundSignalExpression::evaluate(void*) 0x106748d1f
6 QQmlBoundSignal_callback(QQmlNoti!erEndpoint*, void*) QQmlBoundSignal_callback(QQmlNoti!erEndpoint, void**) 0x106749746
7 QQmlNoti!er::emitNotify(QQmlNoti!erEndpoint*, void*) QQmlNoti!er::emitNotify(QQmlNoti!erEndpoint, void**) 0x10678337c
8 QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void*) QQmlData::signalEmitted(QAbstractDeclarativeData, QObject*, int, void**) 0x106726443
9 QMetaObject::activate(QObject*, int, int, void*) QMetaObject::activate(QObject, int, int, void**) 0x105e0b017
10 QQmlObjectCreator::!nalize(QQmlInstantiationInterrupt&) QQmlObjectCreator::!nalize(QQmlInstantiationInterrupt&) 0x1067b4dd2
11 QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) QQmlComponentPrivate::complete(QQmlEnginePrivate*,
QQmlComponentPrivate::ConstructionState*) 0x10673f31e
12 QQmlComponentPrivate::completeCreate() QQmlComponentPrivate::completeCreate() 0x10673d569
13 QQmlComponent::create(QQmlContext*) QQmlComponent::create(QQmlContext*) 0x10673eca2
14 QQuickView::continueExecute() QQuickView::continueExecute() 0x10630d5ae
15 QQuickViewPrivate::execute() QQuickViewPrivate::execute() 0x10630d4a6
16 main main.cpp 245 0x1000c0fe5
17 start start 0x10000e534