如何正确处理运行时错误.Caller（0）

Question

I'm using runtime.Caller(0) to return the file name:

_, file, _, ok := runtime.Caller(0)
if !ok {
    // What should I do here?
}

I would like to know:

• Why this function in specific doesn't provide an error?
• What should I do if it fails? (Panic, fatal error?)
• What could be wrong to fail? Should I validate at all?

This is my first week using Go, so I might seem like stupid questions if you are already advanced, and I'm sorry for that.

Thanks in advance.

Answer 1

Why this function in specific doesn't provide an error?

That is opinion based.

What should I do if it fails? (Panic, fatal error?)

Whatever fits your needs.

What could be wrong to fail?

Everything. E.g. a binary stripped of debug information.

Should I validate at all?

Yes of course.