error: lifetime may not live long enough --> $DIR/issue-52213.rs:3:20 | LL | fn transmute_lifetime<'a, 'b, T>(t: &'a (T,)) -> &'b T { | -- -- lifetime `'b` defined here | | | lifetime `'a` defined here LL | match (&t,) { LL | ((u,),) => u, | ^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a` | = help: consider adding the following bound: `'a: 'b` error: aborting due to previous error