error: struct update has no effect, all the fields in the struct have already been specified --> $DIR/needless_update.rs:16:23 | 16 | S { a: 1, b: 1, ..base }; | ^^^^ | note: lint level defined here --> $DIR/needless_update.rs:4:9 | 4 | #![deny(needless_update)] | ^^^^^^^^^^^^^^^ error: aborting due to previous error