rust/tests/ui/nll/borrowed-universal-error.rs

fn gimme(x: &(u32,)) -> &u32 {
    &x.0
}

fn foo<'a>(x: &'a (u32,)) -> &'a u32 {
    let v = 22;
    gimme(&(v,))
    //~^ ERROR cannot return value referencing temporary value [E0515]
}

fn main() {}
Make explain borrow work for Universal lifetimes 2018-03-01 11:56:43 -03:00			`fn gimme(x: &(u32,)) -> &u32 {`
			`&x.0`
			`}`

			`fn foo<'a>(x: &'a (u32,)) -> &'a u32 {`
			`let v = 22;`
			`gimme(&(v,))`
Use new region infer errors for explaining borrows This gives at least some explanation for why a borrow is expected to last for a certain free region. Also: * Reports E0373: "closure may outlive the current function" with NLL. * Special cases the case of returning a reference to (or value referencing) a local variable or temporary (E0515). * Special case assigning a reference to a local variable in a closure to a captured variable. 2018-10-14 15:12:02 +01:00			`//~^ ERROR cannot return value referencing temporary value [E0515]`
Make explain borrow work for Universal lifetimes 2018-03-01 11:56:43 -03:00			`}`

			`fn main() {}`