error[E0412]: cannot find type `Missing` in this scope
  --> $DIR/issue-118950-root-region.rs:19:55
   |
LL | impl<T> Overlap<for<'a> fn(Assoc<'a, T>)> for T where Missing: Overlap<T> {}
   |                                                       ^^^^^^^ not found in this scope

warning: the feature `lazy_type_alias` is incomplete and may not be safe to use and/or cause compiler crashes
  --> $DIR/issue-118950-root-region.rs:5:12
   |
LL | #![feature(lazy_type_alias)]
   |            ^^^^^^^^^^^^^^^
   |
   = note: see issue #112792 <https://github.com/rust-lang/rust/issues/112792> for more information
   = note: `#[warn(incomplete_features)]` on by default

error[E0277]: the trait bound `*const T: ToUnit<'a>` is not satisfied
  --> $DIR/issue-118950-root-region.rs:14:21
   |
LL | type Assoc<'a, T> = <*const T as ToUnit<'a>>::Unit;
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `ToUnit<'a>` is not implemented for `*const T`
   |
help: this trait has no implementations, consider adding one
  --> $DIR/issue-118950-root-region.rs:8:1
   |
LL | trait ToUnit<'a> {
   | ^^^^^^^^^^^^^^^^

 WARN rustc_infer::infer::relate::generalize may incompletely handle alias type: AliasTy { args: ['^0.Named(DefId(0:15 ~ issue_118950_root_region[d54f]::{impl#1}::'a), "'a"), ?1t], def_id: DefId(0:8 ~ issue_118950_root_region[d54f]::Assoc), .. }
 WARN rustc_infer::infer::relate::generalize may incompletely handle alias type: AliasTy { args: ['^0.Named(DefId(0:15 ~ issue_118950_root_region[d54f]::{impl#1}::'a), "'a"), ?1t], def_id: DefId(0:8 ~ issue_118950_root_region[d54f]::Assoc), .. }
 WARN rustc_infer::infer::relate::generalize may incompletely handle alias type: AliasTy { args: ['^0.Named(DefId(0:15 ~ issue_118950_root_region[d54f]::{impl#1}::'a), "'a"), ?1t], def_id: DefId(0:8 ~ issue_118950_root_region[d54f]::Assoc), .. }
 WARN rustc_infer::infer::relate::generalize may incompletely handle alias type: AliasTy { args: ['^0.Named(DefId(0:15 ~ issue_118950_root_region[d54f]::{impl#1}::'a), "'a"), ?1t], def_id: DefId(0:8 ~ issue_118950_root_region[d54f]::Assoc), .. }
error[E0119]: conflicting implementations of trait `Overlap<fn(_)>` for type `fn(_)`
  --> $DIR/issue-118950-root-region.rs:19:1
   |
LL | impl<T> Overlap<T> for T {}
   | ------------------------ first implementation here
LL |
LL | impl<T> Overlap<for<'a> fn(Assoc<'a, T>)> for T where Missing: Overlap<T> {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `fn(_)`
   |
   = note: this behavior recently changed as a result of a bug fix; see rust-lang/rust#56105 for details

error: aborting due to 3 previous errors; 1 warning emitted

Some errors have detailed explanations: E0119, E0277, E0412.
For more information about an error, try `rustc --explain E0119`.