pf：gen_*不能call自己

src/gen_call.erl

@@ -45,7 +45,7 @@ do_call(Process, Label, Request, Timeout) ->
             Process ->
                exit(calling_self);
             _ ->
-               Process ! {Label, {self(), Mref}, Request},
+               Process ! {Label, {self(), Mref}, Request}
          end,
          receive
             {Mref, Reply} ->