error: duplicate variant `Var` in inline enum
   ╭▸ test/ui/duplicate_enum_variant.aldrin:15:13
   │
15 │             Var = fallback;
   │             ━━━ duplicate defined here
   │
   ⸬  test/ui/duplicate_enum_variant.aldrin:13:13
   │
13 │             Var @ 1;
   ╰╴            ──────── first defined here