Why not areas that throw exceptions, as shown in gcov / CoverStory?

Question

I use coverage tools in Xcode 4.6 and render with CoverStory. No matter what I do, CoverStory never shows the areas in which I throw Objective-C exceptions as covered, although when I start Unit Tests with breakpoints on these lines, I click breakpoints and tests (which expect throws) all pass.

Is there any tweak I need to set in order to make the coverage tools see this?

EDIT: I found CoverStory exception flags here. It still seems strange to me that this line is not perceived as executable. Why is this?