Surely you mean "IntelliJ rs", right? Kidding aside, this is nice! Always happy to see more support for Rust, and I'm usually pretty impressed by what JetBrains brings to the table in their IDEs, so this is promising! Hopefully this will be one of those cases where the less you need an IDE, the more comfortable the features are for the ones that are built.
For anyone reading the comments with the assumption the OP link is just for the longstanding rust plugin, it is. Do not take the comment above to mean a standalone rust IDE, a la Goland, was announced. Hopes lifted, hopes dashed.
Similarly for Rust, I figure CLion is the best bet?
You would use the LLDB debugger backend similar to your C/C++ projects you would work on with CLion.
Quite a few rust projects do touch or at least reference C projects etc...