error: unnamed fields are not allowed outside of structs or unions
  --> $DIR/anon-struct-in-enum-issue-121446.rs:7:9
   |
LL |         _ : struct { field: u8 },
   |         -^^^^^^^^^^^^^^^^^^^^^^^
   |         |
   |         unnamed field declared here

error: anonymous structs are not allowed outside of unnamed struct or union fields
  --> $DIR/anon-struct-in-enum-issue-121446.rs:7:13
   |
LL |         _ : struct { field: u8 },
   |             ^^^^^^^^^^^^^^^^^^^^ anonymous struct declared here

error: aborting due to 2 previous errors