error: define_varlen requires named fields
 --> shouldfail/unsupported_syntax.rs:4:8
  |
4 | struct UnnamedStruct(u8);
  |        ^^^^^^^^^^^^^

error: define_varlen requires a struct
 --> shouldfail/unsupported_syntax.rs:7:6
  |
7 | enum Enum { A, B }
  |      ^^^^

error: define_varlen requires a struct
  --> shouldfail/unsupported_syntax.rs:10:7
   |
10 | union Union {
   |       ^^^^^

error[E0433]: failed to resolve: could not find `foo` in the crate root
  --> shouldfail/unsupported_syntax.rs:17:19
   |
17 |     pub(in crate::foo::bar) x: u8,
   |                   ^^^ could not find `foo` in the crate root

error: Visibility must be one of: (none), pub, pub(crate), pub(self), pub(super)
  --> shouldfail/unsupported_syntax.rs:17:5
   |
17 |     pub(in crate::foo::bar) x: u8,
   |     ^^^

error: Fields annotated with #[varlen_array] must be of array type
  --> shouldfail/unsupported_syntax.rs:23:8
   |
23 |     x: u8,
   |        ^^

error: Field must have at most one of #[varlen], #[varlen_array], #[controls_layout] attributes
  --> shouldfail/unsupported_syntax.rs:28:21
   |
28 |     #[varlen_array] #[controls_layout]
   |                     ^

error: define_varlen could not parse this as a struct
  --> shouldfail/unsupported_syntax.rs:33:1
   |
33 | fn f() {}
   | ^^

error: cannot find attribute `varlen_array` in this scope
  --> shouldfail/unsupported_syntax.rs:28:7
   |
28 |     #[varlen_array] #[controls_layout]
   |       ^^^^^^^^^^^^

error: cannot find attribute `controls_layout` in this scope
  --> shouldfail/unsupported_syntax.rs:28:23
   |
28 |     #[varlen_array] #[controls_layout]
   |                       ^^^^^^^^^^^^^^^

error: cannot find attribute `varlen_array` in this scope
  --> shouldfail/unsupported_syntax.rs:22:7
   |
22 |     #[varlen_array]
   |       ^^^^^^^^^^^^