From 34cf6932317d18d7614e7c1d03861b0ee7dbb5aa Mon Sep 17 00:00:00 2001
From: Badlop <badlop@process-one.net>
Date: Fri, 10 Jun 2016 13:18:32 +0200
Subject: [PATCH] Recover ec6c58a which was reverted in 100827e (thanks to
 Alexey Shchepin)

---
 src/ejabberd_xmlrpc.erl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ejabberd_xmlrpc.erl b/src/ejabberd_xmlrpc.erl
index c7e72d66d..aa37b643a 100644
--- a/src/ejabberd_xmlrpc.erl
+++ b/src/ejabberd_xmlrpc.erl
@@ -472,7 +472,7 @@ format_arg(undefined, binary) -> <<>>;
 format_arg(undefined, string) -> "";
 format_arg(Arg, Format) ->
     ?ERROR_MSG("don't know how to format Arg ~p for format ~p", [Arg, Format]),
-    error.
+    throw({error_formatting_argument, Arg, Format}).
 
 process_unicode_codepoints(Str) ->
     iolist_to_binary(lists:map(fun(X) when X > 255 -> unicode:characters_to_binary([X]);