161 lines
7.0 KiB
Plaintext
161 lines
7.0 KiB
Plaintext
error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:19:16
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LL | let _num = &mut *(num as *const i32 as *mut i32);
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: `#[deny(invalid_reference_casting)]` on by default
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error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:21:16
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LL | let _num = &mut *(num as *const i32).cast_mut();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:23:16
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LL | let _num = &mut *std::ptr::from_ref(num).cast_mut();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:25:16
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LL | let _num = &mut *std::ptr::from_ref({ num }).cast_mut();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:27:16
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LL | let _num = &mut *{ std::ptr::from_ref(num) }.cast_mut();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:29:16
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LL | let _num = &mut *(std::ptr::from_ref({ num }) as *mut i32);
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:31:16
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LL | let _num = &mut *(num as *const i32).cast::<i32>().cast_mut();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:33:16
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LL | let _num = &mut *(num as *const i32).cast::<i32>().cast_mut().cast_const().cast_mut();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:35:16
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LL | let _num = &mut *(std::ptr::from_ref(static_u8()) as *mut i32);
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:37:16
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LL | let _num = &mut *std::mem::transmute::<_, *mut i32>(num);
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:41:16
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LL | let deferred = num as *const i32 as *mut i32;
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| ----------------------------- casting happend here
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LL | let _num = &mut *deferred;
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| ^^^^^^^^^^^^^^
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error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:44:16
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LL | let deferred = (std::ptr::from_ref(num) as *const i32 as *const i32).cast_mut() as *mut i32;
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| ---------------------------------------------------------------------------- casting happend here
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LL | let _num = &mut *deferred;
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| ^^^^^^^^^^^^^^
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error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:46:16
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LL | let _num = &mut *(num as *const _ as usize as *mut i32);
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
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--> $DIR/reference_casting.rs:50:9
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LL | &mut *((this as *const _) as *mut _)
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
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--> $DIR/reference_casting.rs:60:5
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LL | *(a as *const _ as *mut _) = String::from("Replaced");
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
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--> $DIR/reference_casting.rs:62:5
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LL | *(a as *const _ as *mut String) += " world";
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
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--> $DIR/reference_casting.rs:64:5
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LL | *std::ptr::from_ref(num).cast_mut() += 1;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
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--> $DIR/reference_casting.rs:66:5
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LL | *std::ptr::from_ref({ num }).cast_mut() += 1;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
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--> $DIR/reference_casting.rs:68:5
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LL | *{ std::ptr::from_ref(num) }.cast_mut() += 1;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
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--> $DIR/reference_casting.rs:70:5
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LL | *(std::ptr::from_ref({ num }) as *mut i32) += 1;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
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--> $DIR/reference_casting.rs:72:5
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LL | *std::mem::transmute::<_, *mut i32>(num) += 1;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
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--> $DIR/reference_casting.rs:76:5
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LL | let value = num as *const i32 as *mut i32;
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| ----------------------------- casting happend here
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LL | *value = 1;
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| ^^^^^^^^^^
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error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
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--> $DIR/reference_casting.rs:78:5
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LL | *(num as *const i32).cast::<i32>().cast_mut() = 2;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
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--> $DIR/reference_casting.rs:80:5
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LL | *(num as *const _ as usize as *mut i32) = 2;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: assigning to `&T` is undefined behavior, consider using an `UnsafeCell`
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--> $DIR/reference_casting.rs:84:9
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LL | *(this as *const _ as *mut _) = a;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: aborting due to 25 previous errors
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