error[E0716]: temporary value dropped while borrowed --> $DIR/auto-trait-regions.rs:48:24 | LL | let a = A(&mut true, &mut true, No); | ^^^^ - temporary value is freed at the end of this statement | | | creates a temporary value which is freed while still in use ... LL | assert_foo(a); | - borrow later used here | help: consider using a `let` binding to create a longer lived value | LL ~ let binding = true; LL ~ let a = A(&mut binding, &mut true, No); | error[E0716]: temporary value dropped while borrowed --> $DIR/auto-trait-regions.rs:48:35 | LL | let a = A(&mut true, &mut true, No); | ^^^^ - temporary value is freed at the end of this statement | | | creates a temporary value which is freed while still in use ... LL | assert_foo(a); | - borrow later used here | help: consider using a `let` binding to create a longer lived value | LL ~ let binding = true; LL ~ let a = A(&mut true, &mut binding, No); | error: implementation of `Foo` is not general enough --> $DIR/auto-trait-regions.rs:34:5 | LL | assert_foo(gen); | ^^^^^^^^^^^^^^^ implementation of `Foo` is not general enough | = note: `&'0 OnlyFooIfStaticRef` must implement `Foo`, for any lifetime `'0`... = note: ...but `Foo` is actually implemented for the type `&'static OnlyFooIfStaticRef` error: implementation of `Foo` is not general enough --> $DIR/auto-trait-regions.rs:54:5 | LL | assert_foo(gen); | ^^^^^^^^^^^^^^^ implementation of `Foo` is not general enough | = note: `Foo` would have to be implemented for the type `A<'0, '1>`, for any two lifetimes `'0` and `'1`... = note: ...but `Foo` is actually implemented for the type `A<'_, '2>`, for some specific lifetime `'2` error: aborting due to 4 previous errors For more information about this error, try `rustc --explain E0716`.