Use the right argument name in the preconditions check.
const GValue *value;
g_return_val_if_fail (g_task_is_valid (result, clipboard), NULL);
- g_return_val_if_fail (g_task_get_source_tag (G_TASK (res)) == gdk_clipboard_read_text_async, NULL);
+ g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) == gdk_clipboard_read_text_async, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
value = g_task_propagate_pointer (G_TASK (result), error);