error[E0401]: can't use type parameters from outer function
  --> $DIR/issue-12796.rs:13:22
   |
LL |         fn inner(_: &Self) {
   |            -----     ^^^^ use of type variable from outer function
   |            |
   |            help: try using a local type parameter instead: `inner<Self>`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0401`.