| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:19:16 |
| | |
| LL | let _num = &mut *(num as *const i32 as *mut i32); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| = note: `#[deny(invalid_reference_casting)]` on by default |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:21:16 |
| | |
| LL | let _num = &mut *(num as *const i32).cast_mut(); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:23:16 |
| | |
| LL | let _num = &mut *std::ptr::from_ref(num).cast_mut(); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:25:16 |
| | |
| LL | let _num = &mut *std::ptr::from_ref({ num }).cast_mut(); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:27:16 |
| | |
| LL | let _num = &mut *{ std::ptr::from_ref(num) }.cast_mut(); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:29:16 |
| | |
| LL | let _num = &mut *(std::ptr::from_ref({ num }) as *mut i32); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:31:16 |
| | |
| LL | let _num = &mut *(num as *const i32).cast::<i32>().cast_mut(); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:33:16 |
| | |
| LL | let _num = &mut *(num as *const i32).cast::<i32>().cast_mut().cast_const().cast_mut(); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:35:16 |
| | |
| LL | let _num = &mut *(std::ptr::from_ref(static_u8()) as *mut i32); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:37:16 |
| | |
| LL | let _num = &mut *std::mem::transmute::<_, *mut i32>(num); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:39:16 |
| | |
| LL | let _num = &mut *(std::mem::transmute::<_, *mut i32>(num) as *mut i32); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:41:16 |
| | |
| LL | let _num = &mut *std::cell::UnsafeCell::raw_get( |
| | ________________^ |
| LL | | |
| LL | | num as *const i32 as *const std::cell::UnsafeCell<i32> |
| LL | | ); |
| | |_____^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:47:16 |
| | |
| LL | let deferred = num as *const i32 as *mut i32; |
| | ----------------------------- casting happend here |
| LL | let _num = &mut *deferred; |
| | ^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:50:16 |
| | |
| LL | let deferred = (std::ptr::from_ref(num) as *const i32 as *const i32).cast_mut() as *mut i32; |
| | ---------------------------------------------------------------------------- casting happend here |
| LL | let _num = &mut *deferred; |
| | ^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:53:16 |
| | |
| LL | let deferred = (std::ptr::from_ref(num) as *const i32 as *const i32).cast_mut() as *mut i32; |
| | ---------------------------------------------------------------------------- casting happend here |
| ... |
| LL | let _num = &mut *deferred_rebind; |
| | ^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:55:16 |
| | |
| LL | let _num = &mut *(num as *const _ as usize as *mut i32); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:57:16 |
| | |
| LL | let _num = &mut *(std::mem::transmute::<_, *mut _>(num as *const i32) as *mut i32); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:64:16 |
| | |
| LL | let num = NUM as *const i32 as *mut i32; |
| | ----------------------------- casting happend here |
| ... |
| LL | let _num = &mut *num; |
| | ^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:68:16 |
| | |
| LL | let _num = &mut *(cell as *const _ as *mut i32); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| = note: even for types with interior mutability, the only legal way to obtain a mutable pointer from a shared reference is through `UnsafeCell::get` |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:72:9 |
| | |
| LL | &mut *((this as *const _) as *mut _) |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:77:18 |
| | |
| LL | unsafe { &mut *std::cell::UnsafeCell::raw_get(x as *const _ as *const _) } |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:82:18 |
| | |
| LL | unsafe { &mut *std::cell::UnsafeCell::raw_get(x as *const _ as *const _) } |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:92:5 |
| | |
| LL | *(a as *const _ as *mut _) = String::from("Replaced"); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:94:5 |
| | |
| LL | *(a as *const _ as *mut String) += " world"; |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:96:5 |
| | |
| LL | *std::ptr::from_ref(num).cast_mut() += 1; |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:98:5 |
| | |
| LL | *std::ptr::from_ref({ num }).cast_mut() += 1; |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:100:5 |
| | |
| LL | *{ std::ptr::from_ref(num) }.cast_mut() += 1; |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:102:5 |
| | |
| LL | *(std::ptr::from_ref({ num }) as *mut i32) += 1; |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:104:5 |
| | |
| LL | *std::mem::transmute::<_, *mut i32>(num) += 1; |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:106:5 |
| | |
| LL | *(std::mem::transmute::<_, *mut i32>(num) as *mut i32) += 1; |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:108:5 |
| | |
| LL | / std::ptr::write( |
| LL | | |
| LL | | std::mem::transmute::<*const i32, *mut i32>(num), |
| LL | | -1i32, |
| LL | | ); |
| | |_____^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:113:5 |
| | |
| LL | *((&std::cell::UnsafeCell::new(0)) as *const _ as *mut i32) = 5; |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| = note: even for types with interior mutability, the only legal way to obtain a mutable pointer from a shared reference is through `UnsafeCell::get` |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:117:5 |
| | |
| LL | let value = num as *const i32 as *mut i32; |
| | ----------------------------- casting happend here |
| LL | *value = 1; |
| | ^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:120:5 |
| | |
| LL | let value = num as *const i32 as *mut i32; |
| | ----------------------------- casting happend here |
| ... |
| LL | *value_rebind = 1; |
| | ^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:122:5 |
| | |
| LL | *(num as *const i32).cast::<i32>().cast_mut() = 2; |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:124:5 |
| | |
| LL | *(num as *const _ as usize as *mut i32) = 2; |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:126:5 |
| | |
| LL | let value = num as *const i32 as *mut i32; |
| | ----------------------------- casting happend here |
| ... |
| LL | std::ptr::write(value, 2); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:128:5 |
| | |
| LL | let value = num as *const i32 as *mut i32; |
| | ----------------------------- casting happend here |
| ... |
| LL | std::ptr::write_unaligned(value, 2); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:130:5 |
| | |
| LL | let value = num as *const i32 as *mut i32; |
| | ----------------------------- casting happend here |
| ... |
| LL | std::ptr::write_volatile(value, 2); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell` |
| --> $DIR/reference_casting.rs:134:9 |
| | |
| LL | *(this as *const _ as *mut _) = a; |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html> |
| |
| error: aborting due to 40 previous errors |
| |