error: lifetime may not live long enough --> $DIR/regions-proc-bound-capture.rs:9:5 | LL | fn static_proc(x: &isize) -> Box (isize) + 'static> { | - let's call the lifetime of this reference `'1` LL | // This is illegal, because the region bound on `proc` is 'static. LL | Box::new(move || { *x }) | ^^^^^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'1` must outlive `'static` | help: consider changing the trait object's explicit `'static` bound to the lifetime of argument `x` | LL | fn static_proc(x: &isize) -> Box (isize) + '_> { | ~~ help: alternatively, add an explicit `'static` bound to this reference | LL | fn static_proc(x: &'static isize) -> Box (isize) + 'static> { | ~~~~~~~~~~~~~~ error: aborting due to 1 previous error