The days of self-contained software are long gone. Modern software has to interface with a diverse array of code written by third-parties—building upon libraries and frameworks, consuming data provided by servers, and providing data to clients in turn.
Sooner or later, you’re going to be faced with a bug that is (or appears to be) within something you didn’t write, don’t control, and may not have source for. Handling this kind of bug brings its own unique challenges.
Third-party code is just code. And like any code, it can contain bugs. So yes, it’s quite possible that the problem you’re trying to track down isn’t of your own making.
But beware—it’s very easy to point the ...