error[E0616]: field `len` of struct `S` is private --> $DIR/issue-26472.rs:11:15 | LL | let v = s.len; | ^^^ private field | help: a method `len` also exists, call it with parentheses | LL | let v = s.len(); | ^^ error[E0616]: field `len` of struct `S` is private --> $DIR/issue-26472.rs:12:7 | LL | s.len = v; | ^^^ private field error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0616`.