mirror of https://github.com/rust-lang/rust
44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
error: lifetime may not live long enough
|
|
--> $DIR/suggest-lt-on-ty-alias-w-generics.rs:4:5
|
|
|
|
|
LL | fn test(x: &i32) -> Lazy<i32> {
|
|
| - let's call the lifetime of this reference `'1`
|
|
LL | / Box::new(|| {
|
|
LL | |
|
|
LL | |
|
|
LL | | *x
|
|
LL | | })
|
|
| |______^ returning this value requires that `'1` must outlive `'static`
|
|
|
|
|
help: to declare that the trait object captures data from argument `x`, you can add a lifetime parameter `'a` in the type alias
|
|
|
|
|
LL | type Lazy<'a, T> = Box<dyn Fn() -> T + 'a>;
|
|
| +++ ~~
|
|
|
|
error[E0373]: closure may outlive the current function, but it borrows `x`, which is owned by the current function
|
|
--> $DIR/suggest-lt-on-ty-alias-w-generics.rs:4:14
|
|
|
|
|
LL | Box::new(|| {
|
|
| ^^ may outlive borrowed value `x`
|
|
...
|
|
LL | *x
|
|
| -- `x` is borrowed here
|
|
|
|
|
note: closure is returned here
|
|
--> $DIR/suggest-lt-on-ty-alias-w-generics.rs:4:5
|
|
|
|
|
LL | / Box::new(|| {
|
|
LL | |
|
|
LL | |
|
|
LL | | *x
|
|
LL | | })
|
|
| |______^
|
|
help: to force the closure to take ownership of `x` (and any other referenced variables), use the `move` keyword
|
|
|
|
|
LL | Box::new(move || {
|
|
| ++++
|
|
|
|
error: aborting due to 2 previous errors
|
|
|
|
For more information about this error, try `rustc --explain E0373`.
|