message: [crispy] base64::decode() fix
diff: @@ -147,7 +147,7 @@ size_t decode(Iterator begin, Iterator end, const IndexTable& indexmap, Output o
  // count input bytes (excluding any trailing pad bytes)
  Iterator input = begin;
  - while (index(input) <= 63)
  + while (input != end && index(input) <= 63)
  input++;
  size_t nprbytes = std::distance(begin, input);
  size_t decodedCount = ((nprbytes + 3) / 4) * 3;
  