mirror of
https://github.com/rust-lang/rust.git
synced 2025-10-31 04:57:19 +00:00
320 lines
12 KiB
Plaintext
320 lines
12 KiB
Plaintext
error[E0597]: `x` does not live long enough
|
|
--> $DIR/migration-note.rs:182:17
|
|
|
|
|
LL | let x = vec![0];
|
|
| - binding `x` declared here
|
|
LL |
|
|
LL | display_len(&x)
|
|
| ------------^^-
|
|
| | |
|
|
| | borrowed value does not live long enough
|
|
| argument requires that `x` is borrowed for `'static`
|
|
...
|
|
LL | }
|
|
| - `x` dropped here while still borrowed
|
|
|
|
error[E0502]: cannot borrow `x` as mutable because it is also borrowed as immutable
|
|
--> $DIR/migration-note.rs:19:5
|
|
|
|
|
LL | let a = display_len(&x);
|
|
| -- immutable borrow occurs here
|
|
...
|
|
LL | x.push(1);
|
|
| ^^^^^^^^^ mutable borrow occurs here
|
|
...
|
|
LL | println!("{a}");
|
|
| - immutable borrow later used here
|
|
|
|
|
note: this call may capture more lifetimes than intended, because Rust 2024 has adjusted the `impl Trait` lifetime capture rules
|
|
--> $DIR/migration-note.rs:16:13
|
|
|
|
|
LL | let a = display_len(&x);
|
|
| ^^^^^^^^^^^^^^^
|
|
help: use the precise capturing `use<...>` syntax to make the captures explicit
|
|
|
|
|
LL | fn display_len<T>(x: &Vec<T>) -> impl Display + use<T> {
|
|
| ++++++++
|
|
|
|
error[E0597]: `x` does not live long enough
|
|
--> $DIR/migration-note.rs:29:25
|
|
|
|
|
LL | let x = vec![1];
|
|
| - binding `x` declared here
|
|
LL |
|
|
LL | let a = display_len(&x);
|
|
| ^^ borrowed value does not live long enough
|
|
...
|
|
LL | needs_static(a);
|
|
| --------------- argument requires that `x` is borrowed for `'static`
|
|
LL |
|
|
LL | }
|
|
| - `x` dropped here while still borrowed
|
|
|
|
|
note: this call may capture more lifetimes than intended, because Rust 2024 has adjusted the `impl Trait` lifetime capture rules
|
|
--> $DIR/migration-note.rs:29:13
|
|
|
|
|
LL | let a = display_len(&x);
|
|
| ^^^^^^^^^^^^^^^
|
|
help: use the precise capturing `use<...>` syntax to make the captures explicit
|
|
|
|
|
LL | fn display_len<T>(x: &Vec<T>) -> impl Display + use<T> {
|
|
| ++++++++
|
|
|
|
error[E0505]: cannot move out of `x` because it is borrowed
|
|
--> $DIR/migration-note.rs:48:8
|
|
|
|
|
LL | let x = vec![1];
|
|
| - binding `x` declared here
|
|
LL |
|
|
LL | let a = display_len(&x);
|
|
| -- borrow of `x` occurs here
|
|
...
|
|
LL | mv(x);
|
|
| ^ move out of `x` occurs here
|
|
...
|
|
LL | }
|
|
| - borrow might be used here, when `a` is dropped and runs the destructor for type `impl std::fmt::Display`
|
|
|
|
|
note: this call may capture more lifetimes than intended, because Rust 2024 has adjusted the `impl Trait` lifetime capture rules
|
|
--> $DIR/migration-note.rs:43:13
|
|
|
|
|
LL | let a = display_len(&x);
|
|
| ^^^^^^^^^^^^^^^
|
|
help: use the precise capturing `use<...>` syntax to make the captures explicit
|
|
|
|
|
LL | fn display_len<T>(x: &Vec<T>) -> impl Display + use<T> {
|
|
| ++++++++
|
|
help: consider cloning the value if the performance cost is acceptable
|
|
|
|
|
LL | let a = display_len(&x.clone());
|
|
| ++++++++
|
|
|
|
error[E0499]: cannot borrow `x` as mutable more than once at a time
|
|
--> $DIR/migration-note.rs:66:5
|
|
|
|
|
LL | let a = display_len_mut(&mut x);
|
|
| ------ first mutable borrow occurs here
|
|
...
|
|
LL | x.push(1);
|
|
| ^ second mutable borrow occurs here
|
|
...
|
|
LL | println!("{a}");
|
|
| - first borrow later used here
|
|
|
|
|
note: this call may capture more lifetimes than intended, because Rust 2024 has adjusted the `impl Trait` lifetime capture rules
|
|
--> $DIR/migration-note.rs:63:13
|
|
|
|
|
LL | let a = display_len_mut(&mut x);
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^
|
|
help: use the precise capturing `use<...>` syntax to make the captures explicit
|
|
|
|
|
LL | fn display_len_mut<T>(x: &mut Vec<T>) -> impl Display + use<T> {
|
|
| ++++++++
|
|
|
|
error[E0597]: `x` does not live long enough
|
|
--> $DIR/migration-note.rs:76:29
|
|
|
|
|
LL | let mut x = vec![1];
|
|
| ----- binding `x` declared here
|
|
LL |
|
|
LL | let a = display_len_mut(&mut x);
|
|
| ^^^^^^ borrowed value does not live long enough
|
|
...
|
|
LL | needs_static(a);
|
|
| --------------- argument requires that `x` is borrowed for `'static`
|
|
LL |
|
|
LL | }
|
|
| - `x` dropped here while still borrowed
|
|
|
|
|
note: this call may capture more lifetimes than intended, because Rust 2024 has adjusted the `impl Trait` lifetime capture rules
|
|
--> $DIR/migration-note.rs:76:13
|
|
|
|
|
LL | let a = display_len_mut(&mut x);
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^
|
|
help: use the precise capturing `use<...>` syntax to make the captures explicit
|
|
|
|
|
LL | fn display_len_mut<T>(x: &mut Vec<T>) -> impl Display + use<T> {
|
|
| ++++++++
|
|
|
|
error[E0505]: cannot move out of `x` because it is borrowed
|
|
--> $DIR/migration-note.rs:95:8
|
|
|
|
|
LL | let mut x = vec![1];
|
|
| ----- binding `x` declared here
|
|
LL |
|
|
LL | let a = display_len_mut(&mut x);
|
|
| ------ borrow of `x` occurs here
|
|
...
|
|
LL | mv(x);
|
|
| ^ move out of `x` occurs here
|
|
...
|
|
LL | }
|
|
| - borrow might be used here, when `a` is dropped and runs the destructor for type `impl std::fmt::Display`
|
|
|
|
|
note: this call may capture more lifetimes than intended, because Rust 2024 has adjusted the `impl Trait` lifetime capture rules
|
|
--> $DIR/migration-note.rs:90:13
|
|
|
|
|
LL | let a = display_len_mut(&mut x);
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^
|
|
help: use the precise capturing `use<...>` syntax to make the captures explicit
|
|
|
|
|
LL | fn display_len_mut<T>(x: &mut Vec<T>) -> impl Display + use<T> {
|
|
| ++++++++
|
|
help: consider cloning the value if the performance cost is acceptable
|
|
|
|
|
LL | let a = display_len_mut(&mut x.clone());
|
|
| ++++++++
|
|
|
|
error[E0506]: cannot assign to `s.f` because it is borrowed
|
|
--> $DIR/migration-note.rs:115:5
|
|
|
|
|
LL | let a = display_field(&s.f);
|
|
| ---- `s.f` is borrowed here
|
|
...
|
|
LL | s.f = 1;
|
|
| ^^^^^^^ `s.f` is assigned to here but it was already borrowed
|
|
...
|
|
LL | println!("{a}");
|
|
| - borrow later used here
|
|
|
|
|
note: this call may capture more lifetimes than intended, because Rust 2024 has adjusted the `impl Trait` lifetime capture rules
|
|
--> $DIR/migration-note.rs:112:13
|
|
|
|
|
LL | let a = display_field(&s.f);
|
|
| ^^^^^^^^^^^^^^^^^^^
|
|
help: use the precise capturing `use<...>` syntax to make the captures explicit
|
|
|
|
|
LL | fn display_field<T: Copy + Display>(t: &T) -> impl Display + use<T> {
|
|
| ++++++++
|
|
|
|
error[E0506]: cannot assign to `s.f` because it is borrowed
|
|
--> $DIR/migration-note.rs:131:5
|
|
|
|
|
LL | let a = display_field(&mut s.f);
|
|
| -------- `s.f` is borrowed here
|
|
...
|
|
LL | s.f = 1;
|
|
| ^^^^^^^ `s.f` is assigned to here but it was already borrowed
|
|
...
|
|
LL | println!("{a}");
|
|
| - borrow later used here
|
|
|
|
|
note: this call may capture more lifetimes than intended, because Rust 2024 has adjusted the `impl Trait` lifetime capture rules
|
|
--> $DIR/migration-note.rs:128:13
|
|
|
|
|
LL | let a = display_field(&mut s.f);
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^
|
|
help: use the precise capturing `use<...>` syntax to make the captures explicit
|
|
|
|
|
LL | fn display_field<T: Copy + Display>(t: &T) -> impl Display + use<T> {
|
|
| ++++++++
|
|
|
|
error[E0503]: cannot use `s.f` because it was mutably borrowed
|
|
--> $DIR/migration-note.rs:143:5
|
|
|
|
|
LL | let a = display_field(&mut s.f);
|
|
| -------- `s.f` is borrowed here
|
|
...
|
|
LL | s.f;
|
|
| ^^^ use of borrowed `s.f`
|
|
...
|
|
LL | println!("{a}");
|
|
| - borrow later used here
|
|
|
|
|
note: this call may capture more lifetimes than intended, because Rust 2024 has adjusted the `impl Trait` lifetime capture rules
|
|
--> $DIR/migration-note.rs:140:13
|
|
|
|
|
LL | let a = display_field(&mut s.f);
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^
|
|
help: use the precise capturing `use<...>` syntax to make the captures explicit
|
|
|
|
|
LL | fn display_field<T: Copy + Display>(t: &T) -> impl Display + use<T> {
|
|
| ++++++++
|
|
|
|
error[E0597]: `z.f` does not live long enough
|
|
--> $DIR/migration-note.rs:159:25
|
|
|
|
|
LL | let z = Z { f: vec![1] };
|
|
| - binding `z` declared here
|
|
LL |
|
|
LL | x = display_len(&z.f);
|
|
| ^^^^ borrowed value does not live long enough
|
|
...
|
|
LL | }
|
|
| - `z.f` dropped here while still borrowed
|
|
LL |
|
|
LL | }
|
|
| - borrow might be used here, when `x` is dropped and runs the destructor for type `impl std::fmt::Display`
|
|
|
|
|
= note: values in a scope are dropped in the opposite order they are defined
|
|
note: this call may capture more lifetimes than intended, because Rust 2024 has adjusted the `impl Trait` lifetime capture rules
|
|
--> $DIR/migration-note.rs:159:13
|
|
|
|
|
LL | x = display_len(&z.f);
|
|
| ^^^^^^^^^^^^^^^^^
|
|
help: use the precise capturing `use<...>` syntax to make the captures explicit
|
|
|
|
|
LL | fn display_len<T>(x: &Vec<T>) -> impl Display + use<T> {
|
|
| ++++++++
|
|
|
|
error[E0716]: temporary value dropped while borrowed
|
|
--> $DIR/migration-note.rs:170:40
|
|
|
|
|
LL | let x = { let x = display_len(&mut vec![0]); x };
|
|
| ^^^^^^^ - - borrow later used here
|
|
| | |
|
|
| | temporary value is freed at the end of this statement
|
|
| creates a temporary value which is freed while still in use
|
|
|
|
|
= note: consider using a `let` binding to create a longer lived value
|
|
note: this call may capture more lifetimes than intended, because Rust 2024 has adjusted the `impl Trait` lifetime capture rules
|
|
--> $DIR/migration-note.rs:170:23
|
|
|
|
|
LL | let x = { let x = display_len(&mut vec![0]); x };
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
= note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)
|
|
help: use the precise capturing `use<...>` syntax to make the captures explicit
|
|
|
|
|
LL | fn display_len<T>(x: &Vec<T>) -> impl Display + use<T> {
|
|
| ++++++++
|
|
|
|
error[E0505]: cannot move out of `x` because it is borrowed
|
|
--> $DIR/migration-note.rs:198:10
|
|
|
|
|
LL | let x = String::new();
|
|
| - binding `x` declared here
|
|
LL |
|
|
LL | let y = capture_apit(&x);
|
|
| -- borrow of `x` occurs here
|
|
...
|
|
LL | drop(x);
|
|
| ^ move out of `x` occurs here
|
|
...
|
|
LL | }
|
|
| - borrow might be used here, when `y` is dropped and runs the destructor for type `impl Sized`
|
|
|
|
|
note: this call may capture more lifetimes than intended, because Rust 2024 has adjusted the `impl Trait` lifetime capture rules
|
|
--> $DIR/migration-note.rs:195:13
|
|
|
|
|
LL | let y = capture_apit(&x);
|
|
| ^^^^^^^^^^^^^^^^
|
|
note: you could use a `use<...>` bound to explicitly specify captures, but argument-position `impl Trait`s are not nameable
|
|
--> $DIR/migration-note.rs:189:21
|
|
|
|
|
LL | fn capture_apit(x: &impl Sized) -> impl Sized {}
|
|
| ^^^^^^^^^^
|
|
help: use the precise capturing `use<...>` syntax to make the captures explicit
|
|
|
|
|
LL - fn capture_apit(x: &impl Sized) -> impl Sized {}
|
|
LL + fn capture_apit<T: Sized>(x: &T) -> impl Sized + use<T> {}
|
|
|
|
|
help: consider cloning the value if the performance cost is acceptable
|
|
|
|
|
LL | let y = capture_apit(&x.clone());
|
|
| ++++++++
|
|
|
|
error: aborting due to 13 previous errors
|
|
|
|
Some errors have detailed explanations: E0499, E0502, E0503, E0505, E0506, E0597, E0716.
|
|
For more information about an error, try `rustc --explain E0499`.
|