What's wrong with my debugger?

[Chris via Digitalmars-d-learn]

Please see the linked screenshot: http://i.imgur.com/SpkXu5m.png

As you can see, the inside, outside and collision arrays don't 
seem to work with the debugger. They show a bogus lenght and a 
bogus memory address. Extracting the lenghts to separate 
variables outl, insl and coll show that the arrays actually 
behave properly, though.

Is that a debugger bug? Or maybe something I can fix? Thanks in 
advance.

DMD 2.069.2, Mago debugger, VisualD 3.43, compiling for 32 bits 
if that makes a difference (can't get either 64 bit compilation 
or LDC to work)