src/test/ui/parser/issue-19096.rs

fn main() { // we don't complain about the return type being `{integer}`
    let t = (42, 42);
    t.0::<isize>; //~ ERROR expected one of `.`, `;`, `?`, `}`, or an operator, found `::`
}

fn foo() -> usize { // we don't complain about the return type being unit
    let t = (42, 42);
    t.0::<isize>; //~ ERROR expected one of `.`, `;`, `?`, `}`, or an operator, found `::`
    42;
}