Function rustdoc::clean::inline::merge_attrs

fn merge_attrs(
    cx: &mut DocContext<'_>,
    parent_module: Option<DefId>,
    old_attrs: &'_ [Attribute],
    new_attrs: Option<&'_ [Attribute]>
) -> (Attributes, Option<Arc<Cfg>>)

parent_module refers to the parent of the re-export, not the original item