Merge pull request #261 from dtolnay/inferredbound

Skip needlessly generating inferred bounds during ?Send

src/expand.rs

@@ -239,7 +239,9 @@ fn transform_sig(
  .push(parse_quote_spanned!(default_span=> 'async_trait));
 
  if has_self {
- let bounds: &[InferredBound] = if let Some(receiver) = sig.receiver() {
+ let bounds: &[InferredBound] = if is_local {
+ &[]
+ } else if let Some(receiver) = sig.receiver() {
  match receiver.ty.as_ref() {
  // self: &Self
  Type::Reference(ty) if ty.mutability.is_none() => &[InferredBound::Sync],
@@ -275,7 +277,7 @@ fn transform_sig(
  Context::Trait { supertraits, .. } => !has_default || has_bound(supertraits, bound),
  Context::Impl { .. } => true,
  };
- if assume_bound || is_local {
+ if assume_bound {
  None
  } else {
  Some(bound.spanned_path(default_span))