dbus: Move send_message() call before _error label

Commit 09e6818d01 changed dbus server paths so requests fell back
to freeing allocated memory on errors. However certain kinds of
dbus replies issue a final g_dbus_connection_send_message() there.

In case of errors, _reply_message will be NULL, and the error paths
would have already issued g_dbus_method_invocation_return_gerror(),
so the g_dbus_connection_send_message() call is both unnecessary and
warns on the NULL argument. So  move the DBus reply before the _error
label.

https://bugzilla.gnome.org/show_bug.cgi?id=778540

1 files changed, 19 insertions, 19 deletions

diff --git a/codegen/valagdbusservermodule.vala b/codegen/valagdbusservermodule.vala
index 56b765781..8f74aadb6 100644
--- a/codegen/valagdbusservermodule.vala
+++ b/codegen/valagdbusservermodule.vala
@@ -341,6 +341,25 @@ public class Vala.GDBusServerModule : GDBusClientModule {
 			ccode.add_expression (ccall);
 		}
 
+		if (!no_reply && (!m.coroutine || ready)) {
+			var return_value = new CCodeFunctionCall (new CCodeIdentifier ("g_dbus_connection_send_message"));
+			return_value.add_argument (connection);
+			return_value.add_argument (new CCodeIdentifier ("_reply_message"));
+			return_value.add_argument (new CCodeConstant ("G_DBUS_SEND_MESSAGE_FLAGS_NONE"));
+			return_value.add_argument (new CCodeConstant ("NULL"));
+			return_value.add_argument (new CCodeConstant ("NULL"));
+			ccode.add_expression (return_value);
+
+			// free invocation like g_dbus_method_invocation_return_*
+			var unref_call = new CCodeFunctionCall (new CCodeIdentifier ("g_object_unref"));
+			unref_call.add_argument (new CCodeIdentifier ("invocation"));
+			ccode.add_expression (unref_call);
+
+			unref_call = new CCodeFunctionCall (new CCodeIdentifier ("g_object_unref"));
+			unref_call.add_argument (new CCodeIdentifier ("_reply_message"));
+			ccode.add_expression (unref_call);
+		}
+
 		if (need_goto_label) {
 			ccode.add_label ("_error");
 		}
@@ -368,25 +387,6 @@ public class Vala.GDBusServerModule : GDBusClientModule {
 			}
 		}
 
-		if (!no_reply && (!m.coroutine || ready)) {
-			var return_value = new CCodeFunctionCall (new CCodeIdentifier ("g_dbus_connection_send_message"));
-			return_value.add_argument (connection);
-			return_value.add_argument (new CCodeIdentifier ("_reply_message"));
-			return_value.add_argument (new CCodeConstant ("G_DBUS_SEND_MESSAGE_FLAGS_NONE"));
-			return_value.add_argument (new CCodeConstant ("NULL"));
-			return_value.add_argument (new CCodeConstant ("NULL"));
-			ccode.add_expression (return_value);
-
-			// free invocation like g_dbus_method_invocation_return_*
-			var unref_call = new CCodeFunctionCall (new CCodeIdentifier ("g_object_unref"));
-			unref_call.add_argument (new CCodeIdentifier ("invocation"));
-			ccode.add_expression (unref_call);
-
-			unref_call = new CCodeFunctionCall (new CCodeIdentifier ("g_object_unref"));
-			unref_call.add_argument (new CCodeIdentifier ("_reply_message"));
-			ccode.add_expression (unref_call);
-		}
-
 		pop_function ();
 
 		cfile.add_function_declaration (function);