error[E0109]: type arguments are not allowed on local variable
  --> $DIR/issue-60989.rs:12:10
   |
LL |     c1::<()>;
   |     --   ^^ type argument not allowed
   |     |
   |     not allowed on local variable

error[E0109]: type arguments are not allowed on local variable
  --> $DIR/issue-60989.rs:16:10
   |
LL |     c1::<dyn Into<B>>;
   |     --   ^^^^^^^^^^^ type argument not allowed
   |     |
   |     not allowed on local variable

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0109`.