error[E0616]: field `foo` of struct `S` is private
  --> $DIR/issue-90483-inaccessible-field-adjustment.rs:11:18
   |
LL |   || s.foo() + s.foo;
   |                  ^^^ private field
   |
help: a method `foo` also exists, call it with parentheses
   |
LL |   || s.foo() + s.foo();
   |                     ++

error: aborting due to previous error

For more information about this error, try `rustc --explain E0616`.