How do you get a Golang program to print the line number of the error it just called?

Question

I was trying to throw errors in my Golang program with log.Fatal but, log.Fatal does not also print the line where the log.Fatal was r

Answer 1

You can set the Flags on either a custom Logger, or the default to include Llongfile or Lshortfile

// to change the flags on the default logger
log.SetFlags(log.LstdFlags | log.Lshortfile)