error[E0283]: type annotations needed: cannot satisfy `&(): Marker`
  --> $DIR/overlap-marker-trait-with-underscore-lifetime.rs:6:17
   |
LL | impl Marker for &'_ () {}
   |                 ^^^^^^
   |
note: multiple `impl`s satisfying `&(): Marker` found
  --> $DIR/overlap-marker-trait-with-underscore-lifetime.rs:6:1
   |
LL | impl Marker for &'_ () {}
   | ^^^^^^^^^^^^^^^^^^^^^^
LL | impl Marker for &'_ () {}
   | ^^^^^^^^^^^^^^^^^^^^^^

error[E0283]: type annotations needed: cannot satisfy `&(): Marker`
  --> $DIR/overlap-marker-trait-with-underscore-lifetime.rs:7:17
   |
LL | impl Marker for &'_ () {}
   |                 ^^^^^^
   |
note: multiple `impl`s satisfying `&(): Marker` found
  --> $DIR/overlap-marker-trait-with-underscore-lifetime.rs:6:1
   |
LL | impl Marker for &'_ () {}
   | ^^^^^^^^^^^^^^^^^^^^^^
LL | impl Marker for &'_ () {}
   | ^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0283`.