error[E0597]: `line` does not live long enough --> $DIR/issue-52126-assign-op-invariance.rs:34:28 | LL | for line in vec!["123456789".to_string(), "12345678".to_string()] { | ---- binding `line` declared here LL | let v: Vec<&str> = line.split_whitespace().collect(); | ^^^^ borrowed value does not live long enough ... LL | acc += cnt2; | --- borrow later used here ... LL | } | - `line` dropped here while still borrowed error: aborting due to previous error For more information about this error, try `rustc --explain E0597`.