I too enjoyed using ddd back in the day. A few weeks ago I needed to visualize a complicated data structure in a Rust program that I'm working on and sadly it completely failed (http://db48x.net/reposurgeon/Screenshot%20from%202020-08-04%...). I spent some time trying to figure out how it was supposed to work (my guess is that GDB's pretty-printer is getting in the way), but didn't have much luck. I think we're going to have to reimplement some of this stuff. I ended up writing some code to dump the data structure out to graphviz. (http://db48x.net/reposurgeon/pathmap-diagrams/generated-path...)