I remember removing a single line taking me about a whole day. Was working on an embedded c++ project (a tv) and for some reason it was randomly stucking in an

I remember removing a single line taking me about a whole day. Was working on an embedded c++ project (a tv) and for some reason it was randomly stucking in an infinite loop. Debugging tools were minimal and it took me a while to figure out it was stucking in some kind of mutex and all I did was removing one mutex lock because it wasn't necessary.