error[E0034]: multiple applicable items in scope
  --> $DIR/issue-18446.rs:18:7
   |
LL |     x.foo();
   |     --^^^--
   |     | |
   |     | multiple `foo` found
   |     help: disambiguate the associated function for candidate #2: `T::foo(&x)`
   |
note: candidate #1 is defined in an impl for the type `(dyn T + 'a)`
  --> $DIR/issue-18446.rs:9:5
   |
LL |     fn foo(&self) {}
   |     ^^^^^^^^^^^^^
note: candidate #2 is defined in the trait `T`
  --> $DIR/issue-18446.rs:5:5
   |
LL |     fn foo(&self);
   |     ^^^^^^^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0034`.