error: traits in `#[derive(...)]` don't accept arguments --> $DIR/malformed-derive-entry.rs:1:14 | LL | #[derive(Copy(Bad))] | ^^^^^ help: remove the arguments error: traits in `#[derive(...)]` don't accept values --> $DIR/malformed-derive-entry.rs:6:14 | LL | #[derive(Copy="bad")] | ^^^^^^ help: remove the value error: malformed `derive` attribute input --> $DIR/malformed-derive-entry.rs:11:1 | LL | #[derive] | ^^^^^^^^^ help: must be of the form: `#[derive(Trait1, Trait2, ...)]` error[E0277]: the trait bound `Test1: Clone` is not satisfied --> $DIR/malformed-derive-entry.rs:1:10 | LL | #[derive(Copy(Bad))] | ^^^^ the trait `Clone` is not implemented for `Test1` | note: required by a bound in `Copy` --> $SRC_DIR/core/src/marker.rs:LL:COL = note: this error originates in the derive macro `Copy` (in Nightly builds, run with -Z macro-backtrace for more info) help: consider annotating `Test1` with `#[derive(Clone)]` | LL + #[derive(Clone)] LL | struct Test1; | error[E0277]: the trait bound `Test2: Clone` is not satisfied --> $DIR/malformed-derive-entry.rs:6:10 | LL | #[derive(Copy="bad")] | ^^^^ the trait `Clone` is not implemented for `Test2` | note: required by a bound in `Copy` --> $SRC_DIR/core/src/marker.rs:LL:COL = note: this error originates in the derive macro `Copy` (in Nightly builds, run with -Z macro-backtrace for more info) help: consider annotating `Test2` with `#[derive(Clone)]` | LL + #[derive(Clone)] LL | struct Test2; | error: aborting due to 5 previous errors For more information about this error, try `rustc --explain E0277`.