trace

Error in ./libs/frank/frank.cr:21: instantiating 'HTTP::Server#listen()'

  server.listen
         ^~~~~~

in /Users/asterite-manas/Projects/crystal/src/http/server/server.cr:37: instantiating 'handle_client(TCPSocket+)'

      handle_client(server.accept)
      ^~~~~~~~~~~~~

in /Users/asterite-manas/Projects/crystal/src/http/server/server.cr:91: instantiating 'previous_def(TCPSocket+)'

      spawn { previous_def }
              ^~~~~~~~~~~~

in /Users/asterite-manas/Projects/crystal/src/http/server/server.cr:73: instantiating 'HTTP::Handler+#call(HTTP::Request)'

        response = @handler.call(request)
                            ^~~~

in ./libs/frank/frank/handler.cr:12: instantiating 'call_next(HTTP::Request)'

    response || call_next(request)
                ^~~~~~~~~

in /Users/asterite-manas/Projects/crystal/src/http/server/server.cr:10: instantiating 'HTTP::Handler+#call(HTTP::Request)'

      next_handler.call(request)
                   ^~~~

in /Users/asterite-manas/Projects/crystal/src/http/server/handlers/websocket_handler.cr:22: instantiating 'HTTP::WebSocketHandler::WebSocketSession#run()'

        ws_session.run
                   ^~~

in /Users/asterite-manas/Projects/crystal/src/http/server/handlers/websocket_handler.cr:41: instantiating 'loop()'

      loop do
      ^~~~

in /Users/asterite-manas/Projects/crystal/src/http/server/handlers/websocket_handler.cr:41: instantiating 'loop()'

      loop do
      ^~~~

in /Users/asterite-manas/Projects/crystal/src/http/server/handlers/websocket_handler.cr:42: instantiating 'HTTP::WebSocket#receive(Slice(UInt8))'

        info = @ws.receive(@buffer)
                   ^~~~~~~

in /Users/asterite-manas/Projects/crystal/src/http/web_socket.cr:48: instantiating 'IO#read_fully(Slice(UInt8))'

      @io.read_fully(@header.to_slice)
          ^~~~~~~~~~

in /Users/asterite-manas/Projects/crystal/src/io.cr:242: instantiating 'read(Slice(UInt8), Int32)'

      read_bytes = read(buffer, count)
                   ^~~~

in /Users/asterite-manas/Projects/crystal/src/uv/stream.cr:22: type must be LibUV::Buf, not (LibUV::Buf | Nil)

    @current_buf.len = LibC::SizeT.cast(Math.min(slice.length, count))
    ^~~~~~~~~~~~