error[E0070]: invalid left-hand side of assignment --> $DIR/issue-77218.rs:4:19 | LL | while Some(0) = value.get(0) {} | - ^ | | | cannot assign to this expression | help: you might have meant to use pattern destructuring | LL | while let Some(0) = value.get(0) {} | +++ error: aborting due to previous error For more information about this error, try `rustc --explain E0070`.