Instantly, as in next line of code? Yeah, probable human error (or auto-generated code). Without being used? Not surprising. It is surprisingly common to al

Instantly, as in next line of code? Yeah, probable human error (or auto-generated code). Without being used? Not surprising. It is surprisingly common to allocate a variable, pass it to a function, and have the call never actually use the variable. Unwind, and the variable is destructed without use. I've seen other nasty framework errors exposed by such (non-)usage patterns.