error: expected one of `)`, `,`, or `::`, found `(`
  --> $DIR/malformed-derive-entry.rs:1:14
   |
LL | #[derive(Copy(Bad))]
   |              ^ expected one of `)`, `,`, or `::` here

error: expected one of `)`, `,`, or `::`, found `=`
  --> $DIR/malformed-derive-entry.rs:4:14
   |
LL | #[derive(Copy="bad")]
   |              ^ expected one of `)`, `,`, or `::` here

warning: empty trait list in `derive`
  --> $DIR/malformed-derive-entry.rs:7:1
   |
LL | #[derive()]
   | ^^^^^^^^^^^

error: attribute must be of the form `#[derive(Trait1, Trait2, ...)]`
  --> $DIR/malformed-derive-entry.rs:10:1
   |
LL | #[derive]
   | ^^^^^^^^^

error: aborting due to 3 previous errors