For those that don't know, rr is a fantastically powerful tool that everyone should learn about. It's a record-and-replay debugger (actually a backend for gdb)

For those that don't know, rr is a fantastically powerful tool that everyone should learn about. It's a record-and-replay debugger (actually a backend for gdb) with low overhead so it's actually practical for normal debugging, unlike the standard r-and-r backends built into gdb, which have very high overheads. Since the user interface is currently via gdb, it might seem a bit underwhelming at the moment.