tasking/t.go
func (t *T) Error(args ...interface{}) {
	fmt.Fprintln(os.Stderr, args...)
	t.Fail()
}
func (t *T) Error(args ...interface{}) {
	fmt.Fprintln(os.Stderr, args...)
	t.Fail()
}
func ( t * T ) Error ( args ... interface { } ) { fmt . Fprintln ( os . Stderr , args ... ) t . Fail ( ) }
// Error is equivalent to Log followed by Fail.
Error is equivalent to Log followed by Fail .