mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-28 17:53:56 +00:00
65 lines
2.9 KiB
Plaintext
65 lines
2.9 KiB
Plaintext
|
error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
|
||
|
|
--> $DIR/cast_ref_to_mut.rs:19:9
|
||
|
|
|
|
||
|
|
LL | (*(a as *const _ as *mut String)).push_str(" world");
|
||
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||
|
|
|
|
||
|
|
= note: `#[deny(cast_ref_to_mut)]` on by default
|
||
|
|
|
||
|
|
error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
|
||
|
|
--> $DIR/cast_ref_to_mut.rs:21:9
|
||
|
|
|
|
||
|
|
LL | *(a as *const _ as *mut _) = String::from("Replaced");
|
||
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||
|
|
|
||
|
|
error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
|
||
|
|
--> $DIR/cast_ref_to_mut.rs:23:9
|
||
|
|
|
|
||
|
|
LL | *(a as *const _ as *mut String) += " world";
|
||
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||
|
|
|
||
|
|
error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
|
||
|
|
--> $DIR/cast_ref_to_mut.rs:25:25
|
||
|
|
|
|
||
|
|
LL | let _num = &mut *(num as *const i32 as *mut i32);
|
||
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||
|
|
|
||
|
|
error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
|
||
|
|
--> $DIR/cast_ref_to_mut.rs:27:25
|
||
|
|
|
|
||
|
|
LL | let _num = &mut *(num as *const i32).cast_mut();
|
||
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||
|
|
|
||
|
|
error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
|
||
|
|
--> $DIR/cast_ref_to_mut.rs:29:20
|
||
|
|
|
|
||
|
|
LL | let _num = *{ num as *const i32 }.cast_mut();
|
||
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||
|
|
|
||
|
|
error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
|
||
|
|
--> $DIR/cast_ref_to_mut.rs:31:9
|
||
|
|
|
|
||
|
|
LL | *std::ptr::from_ref(num).cast_mut() += 1;
|
||
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||
|
|
|
||
|
|
error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
|
||
|
|
--> $DIR/cast_ref_to_mut.rs:33:9
|
||
|
|
|
|
||
|
|
LL | *std::ptr::from_ref({ num }).cast_mut() += 1;
|
||
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||
|
|
|
||
|
|
error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
|
||
|
|
--> $DIR/cast_ref_to_mut.rs:35:9
|
||
|
|
|
|
||
|
|
LL | *{ std::ptr::from_ref(num) }.cast_mut() += 1;
|
||
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||
|
|
|
||
|
|
error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
|
||
|
|
--> $DIR/cast_ref_to_mut.rs:37:9
|
||
|
|
|
|
||
|
|
LL | *(std::ptr::from_ref({ num }) as *mut i32) += 1;
|
||
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||
|
|
|
||
|
|
error: aborting due to 10 previous errors
|
||
|
|
|