lupdate ignores tr() calls in constructor if a member is initialized with C++11 initializer list

If I initialize a member of a class using a C++11 initializer list like this:

Foo:Foo(): m_foo{1, 2, 3}
{
 tr("foo");
}

then the tr() call in the constructor is not found, instead lupdate gives the error message "tr() cannot be called without context". It doesn't matter if I add () around {}. If I initialize the member using any other method the tr() call will be found and extracted.