Exception sending query with bytea[] binary array type? about crystal-pg HOT 2 OPEN

    def self.encode_array(array)
      String.build(array.size + 2) do |io|
        encode_array(io, array)
      end
    end

array_of_binaries = Array(Bytes?).new
array_of_binaries << "Hello".to_slice
array_of_binaries << nil
array_of_binaries << "world".to_slice
array_of_binaries << Bytes[0, 255] # <=== This line breaks the query.

array_of_pg_hex_strings : Array(String?) = array_of_binaries.map do |bytes|
  next nil if bytes.nil?

  String.build do |str|
    str << "\\x"
    bytes.each do |byte|
      str << sprintf("%02x", byte)
    end
  end
end

my_db.query("SELECT * FROM UNNEST($1::bytea[])", args: [array_of_pg_hex_strings]) do |rs|
  rs.each do
    puts rs.read(Bytes?)
  end
end