derived type now showing in debug locals window

I have a feeling I have seen this in the forum "recently" but I can't find it.... Consider the follows source which reproduces something I have been seeing today in a more complex real situation. The routines below are all in separate source files (i.e. there are 4 files).

module somedefs
    implicit none
    type thing
        integer :: A
    end type
    type(thing) :: one_thing
    type(thing) :: many_things(10)
end module somedefs
module dt
    use somedefs
    interface
        module subroutine fred()
        end subroutine fred
    end interface
end module dt
submodule (dt) dtsub
    implicit none
    contains
    module subroutine fred
        integer  ::  I
        one_thing%A = 1
        I           = 1
        !do I = 1 , size(many_things)
            many_things(1)%A = 1
            many_things(5)%A = 5
        !enddo
    end subroutine fred
end submodule dtsub
Program test
    use dt
    implicit none
    call fred()
end program test

In the debugger there is no trace of many_things in the locals window. If I add it to watch at any level it is marked as unknown. If I manually add somedefs::manythings(1) to the watch window it is known but if I click the arrow to look inside it visual studio crashes and auto restarts.

The is VS2013 with the latest compiler.