error: Expected `extend` attribute on struct or one field
 --> tests/ui/extend/extend_attr_struct_field.rs:4:1
  |
4 | #[extend(usize)]
  | ^

error: Expected `extend` attribute on struct or one field
  --> tests/ui/extend/extend_attr_struct_field.rs:12:1
   |
12 | #[extend(usize)]
   | ^

error: Expected `extend` attribute on struct or one field
  --> tests/ui/extend/extend_attr_struct_field.rs:19:1
   |
19 | #[extend(usize)]
   | ^

error: Expected `extend` attribute on struct or one field
  --> tests/ui/extend/extend_attr_struct_field.rs:23:1
   |
23 | #[extend(usize)]
   | ^