From 66ca1871d518e6c13c87ae891d2eb57069d6575d Mon Sep 17 00:00:00 2001
From: Simon McVittie <simon.mcvittie@collabora.co.uk>
Date: Wed, 17 Sep 2014 19:53:02 +0100
Subject: [PATCH 3/5] tp_base_protocol_sanitize_parameters: set error if unable
 to coerce

---
 telepathy-glib/base-protocol.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/telepathy-glib/base-protocol.c b/telepathy-glib/base-protocol.c
index 8faaf22..f98f758 100644
--- a/telepathy-glib/base-protocol.c
+++ b/telepathy-glib/base-protocol.c
@@ -1317,7 +1317,12 @@ tp_base_protocol_sanitize_parameters (TpBaseProtocol *self,
               G_VARIANT_TYPE (param->dtype));
 
           if (coerced == NULL)
-            goto except;
+            {
+              g_set_error (error, TP_ERROR, TP_ERROR_INVALID_ARGUMENT,
+                  "unable to convert %s from type '%s' to type '%s'",
+                  name, G_VALUE_TYPE_NAME (value), param->dtype);
+              goto except;
+            }
 
           if (param->filter != NULL)
             {
-- 
2.1.0