}
if_chain! {
- if let ty::Ref(input_lt, ty, Mutability::MutImmutable) = ty.kind;
+ if let ty::Ref(input_lt, ty, Mutability::Immutable) = ty.kind;
if !output_lts.contains(&input_lt);
if is_copy(cx, ty);
if let Some(size) = cx.layout_of(ty).ok().map(|l| l.size.bytes());