[abecedarius]

I don't understand how you could live the experience that the problem is always with the just-edited code. The closest I can come is supposing that you've always worked with thoroughly unit-tested code (and correct, well-documented libraries, etc.).

[bluGill]

I'm lucky enough that the code base I work on was a "big rewrite" not long enough with the goal of having everything tested. Also we are an embedded system where we know exactly which version of each library to support and upgrading any library is in itself a big deal done as a separate exercise.