Bug or not? Statics inside blocks

[Cecil Ward via Digitalmars-d-learn]

The snippet below failed to compile (I think) in the latest DMD - 
but I can't see the error message in the web-based editor at 
dlang.org. It certainly failed to compile under GDC 5.2.0 when 
tried out using d.godbolt.org. (Is there any chance of a later 
GDC compiler there?)

Is it my bug, or a compiler bug? (name clash at link-time?):
void main()
        {
                {
                immutable static dstring str1 = "a";
                }
                {
                immutable static dstring str1 = "b";
                }
        }