error[E0507]: cannot move out of `self.b`, as `self` is a captured variable in an `Fn` closure --> $DIR/issue-103624.rs:16:13 | LL | async fn foo(&self) { | ----- captured outer variable LL | let bar = self.b.bar().await; LL | spawn_blocking(move || { | ------- captured by this `Fn` closure LL | LL | self.b; | ^^^^^^ move occurs because `self.b` has type `StructB`, which does not implement the `Copy` trait error[E0521]: borrowed data escapes outside of method --> $DIR/issue-103624.rs:14:9 | LL | async fn foo(&self) { | ----- | | | `self` is a reference that is only valid in the method body | let's call the lifetime of this reference `'1` LL | let bar = self.b.bar().await; LL | / spawn_blocking(move || { LL | | LL | | self.b; LL | | LL | | }) | | ^ | | | | |__________`self` escapes the method body here | argument requires that `'1` must outlive `'static` error: aborting due to 2 previous errors Some errors have detailed explanations: E0507, E0521. For more information about an error, try `rustc --explain E0507`.