About the only thing that I can think of would be a proper debugger that actually understood D. gdb kind of works but not all that well. Of course, gdb doesn't even properly understand C++, so in that respect, I'm not sure thatwe're all that much worse of than C++ is.
GDB works on Linux. On OSX, I can't get more than a stack trace out of GDB / LLDB. Or disassembly I suppose. But all variable inspection is broken.
