code: func (t *TraceLocation) match(file string, line int) bool {
  	if t.line != line {
  		return false
  	}
  	if i := strings.LastIndex(file, "/"); i >= 0 {
  		file = file[i+1:]
  	}
  	return t.file == file
  }
docs: // match reports whether the specified file and line matches the trace location.
  // The argument file name is the full path, not the basename specified in the flag.