Gabe Newell recently stated that Valve are currently developing a
new debugger for Linux in addition to helping out with LLDB.
Hopefully this will be good news for D as currently the options
are very limited regarding debuggers. I'm hoping it has a nice
GUI offering... we shall see.
Comments at 18:20
https://www.youtube.com/watch?v=Gzn6E2m3otg#t=18m20s