error: lifetime may not live long enough --> $DIR/issue-52533.rs:5:16 | LL | foo(|a, b| b) | - - ^ closure was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` | | | | | has type `&'1 u32` | has type `&'2 u32` error: aborting due to 1 previous error