We need to g_variant_ref() the return type: the closure delivers it wrapped
in a GValue, and the subsequent g_value_unset() unrefs it to zero otherwise.
This was uncovered by the now working TestClosures.test_variant() test case in
PyGObject.
Also allow passing NULL as argument, to be able to test these code paths as
well.
<doc xml:whitespace="preserve">GClosure which takes one GVariant and returns a GVariant</doc>
<type name="GObject.Closure" c:type="GClosure*"/>
</parameter>
- <parameter name="arg" transfer-ownership="none">
+ <parameter name="arg" transfer-ownership="none" allow-none="1">
<doc xml:whitespace="preserve">a GVariant passed as argument to @closure</doc>
<type name="GLib.Variant" c:type="GVariant*"/>
</parameter>
/**
* regress_test_closure_variant:
* @closure: GClosure which takes one GVariant and returns a GVariant
- * @arg: (transfer none): a GVariant passed as argument to @closure
+ * @arg: (allow-none) (transfer none): a GVariant passed as argument to @closure
*
* Return value: (transfer full): the return value of @closure
*/
NULL);
ret = g_value_get_variant (&return_value);
+ if (ret != NULL)
+ g_variant_ref (ret);
g_value_unset (&return_value);
g_value_unset (&arguments[0]);