Dontbug Debugger Alternatives

Dontbug Debugger reviews and mentions

• Bringing Record and Replay debugging everywhere on Linux
  6 projects | news.ycombinator.com | 26 Mar 2025

  rr has always worked with Python in the sense that it can record and replay Python programs.

  However, when you try to debug the program you can only debug the C code the Python interpreter is written in.

  I suppose you want to be able to debug the Python code itself. Here is something that could do this https://pypy.org/posts/2016/07/reverse-debugging-for-python-... . I don't think the project is active nowadays though. Also I haven't used it so can't say whether it is good or not.

  It should be possible to built a Python reverse debugger on top of rr. I know this should be possible because I built something for PHP https://github.com/sidkshatriya/dontbug .

  There are other fancy (and possibly better) things that are possible -- instead of building a Python debugger atop rr you can record the full trace of the Python program in one go e.g. record the values of important variables at each executed line of the Python program. This is an area which I've done some work internally but nothing public released yet :-) !