detect function that returns an error that's not checked

[lolopinto]

since go doesn't have exceptions, it's easy for a function that returns an error to be missed by callers

e.g.

func foo() error {
  return nil
}

func bar() {
  foo()  // should be flagged!
 // do something else.
}

func bar2() {
  // yay!
  if err := foo(); err != nil {
    log.Fatal(err) 
 }
 // do something else.
}

[dominikh]

That is errcheck's domain. It does not fit into Staticcheck because it has too many false positives in the real world.