I have successfully used GDB's build in reverse debugging once, on a platform that rr didn't yet support at the time. It worked, it helped me track down the bu

I have successfully used GDB's build in reverse debugging once, on a platform that rr didn't yet support at the time. It worked, it helped me track down the bug, but it was painfully slow, I had to do things to limit the size of the input to make it possible to use at all (and thankfully was luckily able to still repro the problem after doing so).