lupdate is confused by C++11 lambdas in constructor initializer lists

If I use a lambda in a constructor initializer list (not a C++ initializer list, like in QTBUG-34128), I get an error message "tr() cannot be called without context". I suspect this and QTBUG-34128 are a problem in lupdate's tokenizer routine looking for a "{" to start the constructor as the context but finding a brace when it didn't expect it.

Sample code:

// MyWidget inherits from QWidget
MyWidget::MyWidget( QWidget* parent )
    : QWidget( parent )
    , _callback( []{ std::cout << "Hi\n"; } )  // Note the lambda
    , _translated1( tr( "Howdy" ) ) // "tr() cannot be called without context"
{
    _translated2 = tr( "Hey" );     // "tr() cannot be called without context"
}

Both of the tr calls here will generate messages from lupdate.