Fix some mistakes.

* remove useless g_obect_{set,get}_property call.
* free GError on error.

eek/eek-gtk-keyboard.c

@@ -338,9 +338,7 @@ eek_gtk_keyboard_set_property (GObject      *object,
         eek_gtk_keyboard_set_keyboard (EEK_GTK_KEYBOARD(object), keyboard);
         break;
     default:
-        g_object_set_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }

eek/eek-gtk-renderer.c

@@ -66,8 +66,13 @@ eek_gtk_renderer_real_get_icon_surface (EekRenderer *self,
                                        size,
                                        0,
                                        &error);
-    if (pixbuf == NULL)
+    if (pixbuf == NULL) {
+        g_warning ("can't get icon pixbuf for %s: %s",
+                   icon_name,
+                   error->message);
+        g_error_free (error);
         return NULL;
+    }
 
     surface = pixbuf_to_cairo_surface (pixbuf);
     g_object_unref (pixbuf);

eek/eek-key.c

@@ -254,9 +254,7 @@ eek_key_set_property (GObject      *object,
         eek_key_set_oref (EEK_KEY(object), g_value_get_uint (value));
         break;
     default:
-        g_object_set_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }
@@ -290,9 +288,7 @@ eek_key_get_property (GObject    *object,
         g_value_set_uint (value, eek_key_get_oref (EEK_KEY(object)));
         break;
     default:
-        g_object_get_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }

eek/eek-keyboard.c

@@ -187,9 +187,7 @@ eek_keyboard_set_property (GObject      *object,
                                             g_value_get_enum (value));
         break;
     default:
-        g_object_set_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }
@@ -211,9 +209,7 @@ eek_keyboard_get_property (GObject    *object,
                           eek_keyboard_get_modifier_behavior (EEK_KEYBOARD(object)));
         break;
     default:
-        g_object_get_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }

eek/eek-renderer.c

@@ -733,9 +733,7 @@ eek_renderer_set_property (GObject      *object,
         g_object_ref (priv->pcontext);
         break;
     default:
-        g_object_set_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }
@@ -753,9 +751,7 @@ eek_renderer_get_property (GObject    *object,
         g_value_set_object (value, priv->keyboard);
         break;
     default:
-        g_object_get_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }

eek/eek-section.c

@@ -303,9 +303,7 @@ eek_section_set_property (GObject      *object,
                                g_value_get_int (value));
         break;
     default:
-        g_object_set_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }
@@ -321,9 +319,7 @@ eek_section_get_property (GObject    *object,
         g_value_set_int (value, eek_section_get_angle (EEK_SECTION(object)));
         break;
     default:
-        g_object_get_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }

eek/eek-symbol.c

@@ -122,9 +122,7 @@ eek_symbol_set_property (GObject      *object,
                                   g_value_get_string (value));
         break;
     default:
-        g_object_set_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }
@@ -154,9 +152,7 @@ eek_symbol_get_property (GObject    *object,
                             eek_symbol_get_icon_name (EEK_SYMBOL(object)));
         break;
     default:
-        g_object_get_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }

eek/eek-text.c

@@ -100,9 +100,7 @@ eek_text_set_property (GObject      *object,
         priv->text = g_strdup (g_value_get_string (value));
         break;
     default:
-        g_object_set_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }
@@ -119,9 +117,7 @@ eek_text_get_property (GObject    *object,
         g_value_set_string (value, priv->text);
         break;
     default:
-        g_object_get_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }

eek/eek-xkb-layout.c

@@ -386,6 +386,7 @@ eek_xkb_layout_set_property (GObject      *object,
         eek_xkb_layout_set_symbols (EEK_XKB_LAYOUT(object), name);
         break;
     default:
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }
@@ -416,6 +417,7 @@ eek_xkb_layout_get_property (GObject    *object,
         g_value_set_string (value, name);
         break;
     default:
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }

eek/eek-xkl-layout.c

@@ -101,27 +101,27 @@ eek_xkl_layout_set_property (GObject      *object,
 {
     EekXklLayout *layout = EEK_XKL_LAYOUT(object);
 
-    switch (prop_id) 
-        {
-        case PROP_MODEL:
-            eek_xkl_layout_set_model (EEK_XKL_LAYOUT(object),
-                                      g_value_get_string (value));
-            break;
-        case PROP_LAYOUTS:
-            eek_xkl_layout_set_layouts (EEK_XKL_LAYOUT(object),
-                                        g_value_get_boxed (value));
-            break;
-        case PROP_VARIANTS:
-            eek_xkl_layout_set_variants (EEK_XKL_LAYOUT(object),
-                                         g_value_get_boxed (value));
-            break;
-        case PROP_OPTIONS:
-            eek_xkl_layout_set_options (EEK_XKL_LAYOUT(object),
-                                        g_value_get_boxed (value));
-            break;
-        default:
-            break;
-        }
+    switch (prop_id) {
+    case PROP_MODEL:
+        eek_xkl_layout_set_model (EEK_XKL_LAYOUT(object),
+                                  g_value_get_string (value));
+        break;
+    case PROP_LAYOUTS:
+        eek_xkl_layout_set_layouts (EEK_XKL_LAYOUT(object),
+                                    g_value_get_boxed (value));
+        break;
+    case PROP_VARIANTS:
+        eek_xkl_layout_set_variants (EEK_XKL_LAYOUT(object),
+                                     g_value_get_boxed (value));
+        break;
+    case PROP_OPTIONS:
+        eek_xkl_layout_set_options (EEK_XKL_LAYOUT(object),
+                                    g_value_get_boxed (value));
+        break;
+    default:
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+        break;
+    }
 }
 
 static void 
@@ -132,31 +132,27 @@ eek_xkl_layout_get_property (GObject    *object,
 {
     EekXklLayout *layout = EEK_XKL_LAYOUT(object);
 
-    switch (prop_id) 
-        {
-        case PROP_MODEL:
-            g_value_set_string
-                (value,
-                 eek_xkl_layout_get_model (EEK_XKL_LAYOUT(object)));
-            break;
-        case PROP_LAYOUTS:
-            g_value_set_boxed
-                (value,
-                 eek_xkl_layout_get_layouts (EEK_XKL_LAYOUT(object)));
-            break;
-        case PROP_VARIANTS:
-            g_value_set_boxed
-                (value,
-                 eek_xkl_layout_get_variants (EEK_XKL_LAYOUT(object)));
-            break;
-        case PROP_OPTIONS:
-            g_value_set_boxed
-                (value,
-                 eek_xkl_layout_get_options (EEK_XKL_LAYOUT(object)));
-            break;
-        default:
-            break;
-        }
+    switch (prop_id) {
+    case PROP_MODEL:
+        g_value_set_string (value,
+                            eek_xkl_layout_get_model (EEK_XKL_LAYOUT(object)));
+        break;
+    case PROP_LAYOUTS:
+        g_value_set_boxed (value,
+                           eek_xkl_layout_get_layouts (EEK_XKL_LAYOUT(object)));
+        break;
+    case PROP_VARIANTS:
+        g_value_set_boxed (value,
+                           eek_xkl_layout_get_variants (EEK_XKL_LAYOUT(object)));
+        break;
+    case PROP_OPTIONS:
+        g_value_set_boxed (value,
+                           eek_xkl_layout_get_options (EEK_XKL_LAYOUT(object)));
+        break;
+    default:
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+        break;
+    }
 }
 
 static void

eek/eek-xml-layout.c

@@ -552,20 +552,30 @@ eek_xml_layout_real_create_keyboard (EekLayout *self,
         nread = g_input_stream_read (G_INPUT_STREAM(priv->source),
                                      buffer, sizeof buffer, NULL,
                                      &error);
+        if (nread < 0) {
+            g_warning ("error reading XML layout: %s",
+                       error->message);
+            g_clear_error (&error);
+        }
+
         if (nread <= 0)
             break;
 
         error = NULL;
-        if (!g_markup_parse_context_parse (pcontext, buffer, nread, &error))
+        if (!g_markup_parse_context_parse (pcontext, buffer, nread,
+                                           &error)) {
+            g_warning ("can't parse XML layout: %s", error->message);
+            g_clear_error (&error);
             break;
+        }
     }
-    if (error)
-        g_warning ("%s", error->message);
 
     error = NULL;
-    g_markup_parse_context_end_parse (pcontext, &error);
-    if (error)
-        g_warning ("%s", error->message);
+    if (!g_markup_parse_context_end_parse (pcontext, &error)) {
+        g_warning ("can't finish parsing XML layout: %s",
+                   error->message);
+        g_error_free (error);
+    }
 
     g_markup_parse_context_free (pcontext);
 
@@ -630,9 +640,7 @@ eek_xml_layout_set_property (GObject      *object,
                                    g_value_get_object (value));
         break;
     default:
-        g_object_set_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }
@@ -649,9 +657,7 @@ eek_xml_layout_get_property (GObject    *object,
                             eek_xml_layout_get_source (EEK_XML_LAYOUT(object)));
         break;
     default:
-        g_object_get_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }

eekboard/eekboard-client.c

@@ -180,6 +180,9 @@ eekboard_client_new (GDBusConnection *connection,
 
         return client;
     }
+
+    g_warning ("can't create client: %s", error->message);
+    g_error_free (error);
     return NULL;
 }
 
@@ -227,8 +230,11 @@ eekboard_client_create_context (EekboardClient *client,
                                       -1,
                                       cancellable,
                                       &error);
-    if (!variant)
+    if (!variant) {
+        g_warning ("failed to call CreateContext: %s", error->message);
+        g_error_free (error);
         return NULL;
+    }
 
     g_variant_get (variant, "(&s)", &object_path);
     connection = g_dbus_proxy_get_connection (G_DBUS_PROXY(client));
@@ -260,6 +266,10 @@ eekboard_async_ready_callback (GObject      *source_object,
                                        &error);
     if (result)
         g_variant_unref (result);
+    else {
+        g_warning ("error in D-Bus proxy call: %s", error->message);
+        g_error_free (error);
+    }
 }
 
 /**

eekboard/eekboard-context-service.c

@@ -195,8 +195,12 @@ eekboard_context_service_real_create_keyboard (EekboardContextService *self,
         error = NULL;
         input = g_file_read (file, NULL, &error);
         g_object_unref (file);
-        if (input == NULL)
+        if (input == NULL) {
+            g_warning ("can't read keyboard file %s: %s",
+                       keyboard_type, error->message);
+            g_error_free (error);
             return NULL;
+        }
         layout = eek_xml_layout_new (G_INPUT_STREAM(input));
     }
     keyboard = eek_keyboard_new (layout, CSW, CSH);
@@ -249,9 +253,7 @@ eekboard_context_service_set_property (GObject      *object,
         priv->fullscreen = g_value_get_boolean (value);
         break;
     default:
-        g_object_set_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }
@@ -285,9 +287,7 @@ eekboard_context_service_get_property (GObject    *object,
         g_value_set_boolean (value, priv->fullscreen);
         break;
     default:
-        g_object_set_property (object,
-                               g_param_spec_get_name (pspec),
-                               value);
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
     }
 }
@@ -351,6 +351,12 @@ eekboard_context_service_constructed (GObject *object)
              context,
              NULL,
              &error);
+
+        if (priv->registration_id == 0) {
+            g_warning ("failed to register context object: %s",
+                       error->message);
+            g_error_free (error);
+        }
     }
 }
 
@@ -501,7 +507,11 @@ eekboard_context_service_init (EekboardContextService *context)
     error = NULL;
     priv->introspection_data =
         g_dbus_node_info_new_for_xml (introspection_xml, &error);
-    g_assert (priv->introspection_data != NULL);
+    if (priv->introspection_data == NULL) {
+        g_warning ("failed to parse D-Bus XML: %s", error->message);
+        g_error_free (error);
+        g_assert_not_reached ();
+    }
 
     priv->keyboard_hash =
         g_hash_table_new_full (g_direct_hash,
@@ -535,14 +545,21 @@ emit_visibility_changed_signal (EekboardContextService *context,
 
     if (priv->connection && priv->enabled) {
         GError *error = NULL;
-        g_dbus_connection_emit_signal (priv->connection,
-                                       NULL,
-                                       priv->object_path,
-                                       EEKBOARD_CONTEXT_SERVICE_INTERFACE,
-                                       "VisibilityChanged",
-                                       g_variant_new ("(b)", visible),
-                                       &error);
-        g_assert_no_error (error);
+        gboolean retval;
+
+        retval = g_dbus_connection_emit_signal (priv->connection,
+                                                NULL,
+                                                priv->object_path,
+                                                EEKBOARD_CONTEXT_SERVICE_INTERFACE,
+                                                "VisibilityChanged",
+                                                g_variant_new ("(b)", visible),
+                                                &error);
+        if (!retval) {
+            g_warning ("failed to emit VisibilityChanged signal: %s",
+                       error->message);
+            g_error_free (error);
+            g_assert_not_reached ();
+        }
     }
 }
 
@@ -554,14 +571,21 @@ emit_group_changed_signal (EekboardContextService *context,
 
     if (priv->connection && priv->enabled) {
         GError *error = NULL;
-        g_dbus_connection_emit_signal (priv->connection,
-                                       NULL,
-                                       priv->object_path,
-                                       EEKBOARD_CONTEXT_SERVICE_INTERFACE,
-                                       "GroupChanged",
-                                       g_variant_new ("(i)", group),
-                                       &error);
-        g_assert_no_error (error);
+        gboolean retval;
+
+        retval = g_dbus_connection_emit_signal (priv->connection,
+                                                NULL,
+                                                priv->object_path,
+                                                EEKBOARD_CONTEXT_SERVICE_INTERFACE,
+                                                "GroupChanged",
+                                                g_variant_new ("(i)", group),
+                                                &error);
+        if (!retval) {
+            g_warning ("failed to emit GroupChanged signal: %s",
+                       error->message);
+            g_error_free (error);
+            g_assert_not_reached ();
+        }
     }
 }
 
@@ -577,22 +601,28 @@ emit_key_activated_dbus_signal (EekboardContextService *context,
         guint modifiers = eek_keyboard_get_modifiers (priv->keyboard);
         GVariant *variant;
         GError *error;
+        gboolean retval;
 
         variant = eek_serializable_serialize (EEK_SERIALIZABLE(symbol));
 
         error = NULL;
-        g_dbus_connection_emit_signal (priv->connection,
-                                       NULL,
-                                       priv->object_path,
-                                       EEKBOARD_CONTEXT_SERVICE_INTERFACE,
-                                       "KeyActivated",
-                                       g_variant_new ("(svu)",
-                                                      keyname,
-                                                      variant,
-                                                      modifiers),
-                                       &error);
+        retval = g_dbus_connection_emit_signal (priv->connection,
+                                                NULL,
+                                                priv->object_path,
+                                                EEKBOARD_CONTEXT_SERVICE_INTERFACE,
+                                                "KeyActivated",
+                                                g_variant_new ("(svu)",
+                                                               keyname,
+                                                               variant,
+                                                               modifiers),
+                                                &error);
         g_variant_unref (variant);
-        g_assert_no_error (error);
+        if (!retval) {
+            g_warning ("failed to emit KeyActivated signal: %s",
+                       error->message);
+            g_error_free (error);
+            g_assert_not_reached ();
+        }
     }
 }
 
@@ -919,17 +949,24 @@ eekboard_context_service_enable (EekboardContextService *context)
     g_return_if_fail (priv->connection);
 
     if (!priv->enabled) {
+        gboolean retval;
+
         priv->enabled = TRUE;
 
         error = NULL;
-        g_dbus_connection_emit_signal (priv->connection,
-                                       NULL,
-                                       priv->object_path,
-                                       EEKBOARD_CONTEXT_SERVICE_INTERFACE,
-                                       "Enabled",
-                                       NULL,
-                                       &error);
-        g_assert_no_error (error);
+        retval = g_dbus_connection_emit_signal (priv->connection,
+                                                NULL,
+                                                priv->object_path,
+                                                EEKBOARD_CONTEXT_SERVICE_INTERFACE,
+                                                "Enabled",
+                                                NULL,
+                                                &error);
+        if (!retval) {
+            g_warning ("failed to emit Enabled signal: %s",
+                       error->message);
+            g_error_free (error);
+            g_assert_not_reached ();
+        }
         g_signal_emit_by_name (context, "enabled", NULL);
     }
 }
@@ -951,17 +988,24 @@ eekboard_context_service_disable (EekboardContextService *context)
     g_return_if_fail (priv->connection);
 
     if (priv->enabled) {
+        gboolean retval;
+
         priv->enabled = FALSE;
 
         error = NULL;
-        g_dbus_connection_emit_signal (priv->connection,
-                                       NULL,
-                                       priv->object_path,
-                                       EEKBOARD_CONTEXT_SERVICE_INTERFACE,
-                                       "Disabled",
-                                       NULL,
-                                       &error);
-        g_assert_no_error (error);
+        retval = g_dbus_connection_emit_signal (priv->connection,
+                                                NULL,
+                                                priv->object_path,
+                                                EEKBOARD_CONTEXT_SERVICE_INTERFACE,
+                                                "Disabled",
+                                                NULL,
+                                                &error);
+        if (!retval) {
+            g_warning ("failed to emit Disabled signal: %s",
+                       error->message);
+            g_error_free (error);
+            g_assert_not_reached ();
+        }
         g_signal_emit_by_name (context, "disabled", NULL);
     }
 }

eekboard/eekboard-context.c

@@ -350,6 +350,10 @@ eekboard_context_new (GDBusConnection *connection,
 
         return context;
     }
+
+    g_warning ("can't create context client: %s", error->message);
+    g_error_free (error);
+
     return NULL;
 }
 
@@ -366,6 +370,10 @@ context_async_ready_callback (GObject      *source_object,
                                        &error);
     if (result)
         g_variant_unref (result);
+    else {
+        g_warning ("error in D-Bus proxy call: %s", error->message);
+        g_error_free (error);
+    }
 }
 
 /**
@@ -403,6 +411,10 @@ eekboard_context_add_keyboard (EekboardContext *context,