QJSEngine: Throw exceptions from OQbject's method that is called from script, and catch this exception in C++

dimonomid

I have code like this:

        try {
            QJSValue returned = func.callWithInstance(
                    val_this,
                    QJSValueList() << arg1 << arg2
                    );
            /* ... */
        } catch (std::invalid_argument e){
            /* ... */
        }

The func script calls QObject's method, and in this method exception is thrown, just like this:

throw std::invalid_argument("test");

So, I was expecting that I will catch this exception in C++ code. However, application is just terminated:

terminate called after throwing an instance of 'std::invalid_argument'
  what():  test

Here is the relevant part of call stack:

0	__kernel_vsyscall			0xb7fdd424
1	raise			0xb6513607
2	abort			0xb6516a33
3	__gnu_cxx::__verbose_terminate_handler()			0xb66fd595
4	??			0xb66fb1f3
5	std::terminate()			0xb66fb22f
6	__cxa_throw			0xb66fb496
7	HTCore::ByteArrReadWrite::ensureSize	bytearr_read_write.cpp	61	0x80616cb
8	HTCore::ByteArrReadWrite::putU16	bytearr_read_write.cpp	95	0x80618fa
9	HTCore::ByteArrReadWrite::qt_static_metacall	moc_bytearr_read_write.cpp	103	0x8078bc8
10	HTCore::ByteArrReadWrite::qt_metacall	moc_bytearr_read_write.cpp	143	0x8078e82
11	QMetaObject::metacall(QObject *, QMetaObject::Call, int, void * *)			0xb6a2aec2
12	??			0xb6f767f2
13	??			0xb6ef2c20
14	??			0xb6ef3bd6
15	QV4::QObjectMethod::callInternal(QV4::CallData *)			0xb6ef45ae
16	QV4::QObjectMethod::call(QV4::Managed *, QV4::CallData *)			0xb6ef4dac
17	QV4::Runtime::callProperty(QV4::ExecutionEngine *, int, QV4::CallData *)			0xb6f091a3
18	??			0xb0e08883
19	??			0xb6ea691d
20	QJSValue::callWithInstance(QJSValue const&, QList<QJSValue> const&)			0xb6e049c5
21	HTCore::ReqHandler::handle	htreqhandler.cpp	129	0x805e2a6
......

The exception is actually thrown in HTCore::ByteArrReadWrite::ensureSize, and after this, I expected stack to unwind to HTCore::ReqHandler::handle, from which callWithInstance was called.
Why this doesn't work?