error[E0107]: struct takes at most 2 generic arguments but 3 generic arguments were supplied --> $DIR/generic-impl-more-params-with-defaults.rs:13:5 | LL | Vec::::new(); | ^^^ ---- help: remove this generic argument | | | expected at most 2 generic arguments | note: struct defined here, with at most 2 generic parameters: `T`, `A` --> $DIR/generic-impl-more-params-with-defaults.rs:5:8 | LL | struct Vec( | ^^^ - -------- error: aborting due to previous error For more information about this error, try `rustc --explain E0107`.