error: malformed `proc_macro_derive` attribute input
  --> $DIR/attribute.rs:9:1
   |
LL | #[proc_macro_derive]
   | ^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[proc_macro_derive(TraitName, /*opt*/ attributes(name1, name2, ...))]`

error: malformed `proc_macro_derive` attribute input
  --> $DIR/attribute.rs:12:1
   |
LL | #[proc_macro_derive = ""]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[proc_macro_derive(TraitName, /*opt*/ attributes(name1, name2, ...))]`

error: attribute must have either one or two arguments
  --> $DIR/attribute.rs:15:1
   |
LL | #[proc_macro_derive(d3, a, b)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: attribute must have either one or two arguments
  --> $DIR/attribute.rs:19:1
   |
LL | #[proc_macro_derive(d4, attributes(a), b)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: not a meta item
  --> $DIR/attribute.rs:23:21
   |
LL | #[proc_macro_derive("a")]
   |                     ^^^

error: must only be one word
  --> $DIR/attribute.rs:27:21
   |
LL | #[proc_macro_derive(d6 = "")]
   |                     ^^^^^^^

error: must only be one word
  --> $DIR/attribute.rs:31:21
   |
LL | #[proc_macro_derive(m::d7)]
   |                     ^^^^^

error: must only be one word
  --> $DIR/attribute.rs:35:21
   |
LL | #[proc_macro_derive(d8(a))]
   |                     ^^^^^

error: `self` cannot be a name of derive macro
  --> $DIR/attribute.rs:39:21
   |
LL | #[proc_macro_derive(self)]
   |                     ^^^^

error: second argument must be `attributes`
  --> $DIR/attribute.rs:46:26
   |
LL | #[proc_macro_derive(d11, a)]
   |                          ^

error: attribute must be of form: `attributes(foo, bar)`
  --> $DIR/attribute.rs:46:26
   |
LL | #[proc_macro_derive(d11, a)]
   |                          ^

error: attribute must be of form: `attributes(foo, bar)`
  --> $DIR/attribute.rs:51:26
   |
LL | #[proc_macro_derive(d12, attributes)]
   |                          ^^^^^^^^^^

error: not a meta item
  --> $DIR/attribute.rs:55:37
   |
LL | #[proc_macro_derive(d13, attributes("a"))]
   |                                     ^^^

error: must only be one word
  --> $DIR/attribute.rs:59:37
   |
LL | #[proc_macro_derive(d14, attributes(a = ""))]
   |                                     ^^^^^^

error: must only be one word
  --> $DIR/attribute.rs:63:37
   |
LL | #[proc_macro_derive(d15, attributes(m::a))]
   |                                     ^^^^

error: must only be one word
  --> $DIR/attribute.rs:67:37
   |
LL | #[proc_macro_derive(d16, attributes(a(b)))]
   |                                     ^^^^

error: `self` cannot be a name of derive helper attribute
  --> $DIR/attribute.rs:71:37
   |
LL | #[proc_macro_derive(d17, attributes(self))]
   |                                     ^^^^

error: aborting due to 17 previous errors