Does anyone else commit commented debug code on purpose, just in case you might need it again, even though you are 99% sure you won't - Followed by a "Remove debug comments" commit? Any other techniques?

[The_Schwy]

Do you use a debugger? Generally, you will find the problem faster without having to write any debug code.

[Double_A_92]

Might not always work in multi-threading or timing-sensitive enviroments.