error[E0434]: can't capture dynamic environment in a fn item --> $DIR/issue-3021-b.rs:9:22 | LL | self.v0 = k0 ^ 0x736f6d6570736575; | ^^ | = help: use the `|| { ... }` closure form instead error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0434`.