Rethrow error in websocket

Author: Zentrik

src/WebSockets.jl

@@ -384,6 +384,7 @@ function open(f::Function, url; suppress_close_error::Bool=false, verbose=false,
                     close(ws, CloseFrameBody(1008, "Unexpected client websocket error"))
                 end
             end
+            rethrow()
         finally
             if !isclosed(ws)
                 close(ws, CloseFrameBody(1000, ""))