message: Restricting (typed=false, fixed=true) combination in flexbuffer CreateVector
diff: @@ -1417,6 +1417,7 @@ class Builder FLATBUFFERS_FINAL_CLASS {
  Value CreateVector(size_t start, size_t vec_len, size_t step, bool typed,
  bool fixed, const Value *keys = nullptr) {
  + FLATBUFFERS_ASSERT(!fixed || typed); // typed=false, fixed=true combination is not supported.
  // Figure out smallest bit width we can store this vector with.
  auto bit_width = (std::max)(force_min_bit_width_, WidthU(vec_len));
  auto prefix_elems = 1;
  