note: External requirements --> $DIR/ty-param-closure-outlives-from-where-clause.rs:27:26 | LL | with_signature(a, b, |x, y| { | __________________________^ LL | | LL | | // LL | | // See `correct_region`, which explains the point of this ... | LL | | require(&x, &y) LL | | }) | |_____^ | = note: defining type: no_region::::{{closure}}#0 with closure substs [ i32, extern "rust-call" fn((std::cell::Cell<&'_#1r ()>, T)), ] = note: late-bound region is '_#2r = note: number of external vids: 3 = note: where T: '_#1r note: No external requirements --> $DIR/ty-param-closure-outlives-from-where-clause.rs:26:1 | LL | / fn no_region<'a, T>(a: Cell<&'a ()>, b: T) { LL | | with_signature(a, b, |x, y| { LL | | LL | | // ... | LL | | }) LL | | } | |_^ | = note: defining type: no_region:: error[E0309]: the parameter type `T` may not live long enough --> $DIR/ty-param-closure-outlives-from-where-clause.rs:27:26 | LL | with_signature(a, b, |x, y| { | __________________________^ LL | | LL | | // LL | | // See `correct_region`, which explains the point of this ... | LL | | require(&x, &y) LL | | }) | |_____^ | = help: consider adding an explicit lifetime bound `T: ReFree(DefId(0:11 ~ ty_param_closure_outlives_from_where_clause[317d]::no_region[0]), BrNamed(DefId(0:12 ~ ty_param_closure_outlives_from_where_clause[317d]::no_region[0]::'a[0]), 'a))`... note: External requirements --> $DIR/ty-param-closure-outlives-from-where-clause.rs:43:26 | LL | with_signature(a, b, |x, y| { | __________________________^ LL | | // Key point of this test: LL | | // LL | | // The *closure* is being type-checked with all of its free ... | LL | | require(&x, &y) LL | | }) | |_____^ | = note: defining type: correct_region::<'_#1r, T>::{{closure}}#0 with closure substs [ i32, extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T)), ] = note: number of external vids: 3 = note: where T: '_#2r note: No external requirements --> $DIR/ty-param-closure-outlives-from-where-clause.rs:39:1 | LL | / fn correct_region<'a, T>(a: Cell<&'a ()>, b: T) LL | | where LL | | T: 'a, LL | | { ... | LL | | }) LL | | } | |_^ | = note: defining type: correct_region::<'_#1r, T> note: External requirements --> $DIR/ty-param-closure-outlives-from-where-clause.rs:64:26 | LL | with_signature(a, b, |x, y| { | __________________________^ LL | | LL | | // See `correct_region` LL | | require(&x, &y) LL | | }) | |_____^ | = note: defining type: wrong_region::<'_#1r, T>::{{closure}}#0 with closure substs [ i32, extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T)), ] = note: late-bound region is '_#3r = note: number of external vids: 4 = note: where T: '_#2r note: No external requirements --> $DIR/ty-param-closure-outlives-from-where-clause.rs:60:1 | LL | / fn wrong_region<'a, 'b, T>(a: Cell<&'a ()>, b: T) LL | | where LL | | T: 'b, LL | | { ... | LL | | }) LL | | } | |_^ | = note: defining type: wrong_region::<'_#1r, T> error[E0309]: the parameter type `T` may not live long enough --> $DIR/ty-param-closure-outlives-from-where-clause.rs:64:26 | LL | with_signature(a, b, |x, y| { | __________________________^ LL | | LL | | // See `correct_region` LL | | require(&x, &y) LL | | }) | |_____^ | = help: consider adding an explicit lifetime bound `T: ReFree(DefId(0:19 ~ ty_param_closure_outlives_from_where_clause[317d]::wrong_region[0]), BrNamed(DefId(0:20 ~ ty_param_closure_outlives_from_where_clause[317d]::wrong_region[0]::'a[0]), 'a))`... note: External requirements --> $DIR/ty-param-closure-outlives-from-where-clause.rs:77:26 | LL | with_signature(a, b, |x, y| { | __________________________^ LL | | // See `correct_region` LL | | require(&x, &y) LL | | }) | |_____^ | = note: defining type: outlives_region::<'_#1r, '_#2r, T>::{{closure}}#0 with closure substs [ i32, extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T)), ] = note: number of external vids: 4 = note: where T: '_#3r note: No external requirements --> $DIR/ty-param-closure-outlives-from-where-clause.rs:72:1 | LL | / fn outlives_region<'a, 'b, T>(a: Cell<&'a ()>, b: T) LL | | where LL | | T: 'b, LL | | 'b: 'a, ... | LL | | }) LL | | } | |_^ | = note: defining type: outlives_region::<'_#1r, '_#2r, T> error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0309`.