error: expected identifier, found keyword `Self`
  --> $DIR/doc-before-bad-variant.rs:4:5
   |
LL | enum TestEnum {
   |      -------- while parsing this enum
...
LL |     Self,
   |     ^^^^ expected identifier, found keyword
   |
   = help: enum variants can be `Variant`, `Variant = <integer>`, `Variant(Type, ..., TypeN)` or `Variant { fields: Types }`

error: aborting due to 1 previous error