warning: unnecessary path disambiguator
  --> $DIR/issue-36116.rs:20:50
   |
LL |     let f = Some(Foo { _a: 42 }).map(|a| a as Foo::<i32>); //~ WARN unnecessary path disambiguator
   |                                                  ^^ try removing `::`

warning: unnecessary path disambiguator
  --> $DIR/issue-36116.rs:21:15
   |
LL |     let g: Foo::<i32> = Foo { _a: 42 }; //~ WARN unnecessary path disambiguator
   |               ^^ try removing `::`