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`
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--> $DIR/reference_casting.rs:19:9
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LL | (*(a as *const _ as *mut String)).push_str(" world");
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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:21:9
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LL | *(a as *const _ as *mut _) = String::from("Replaced");
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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:23:9
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LL | *(a as *const _ as *mut String) += " world";
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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:25:25
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LL | let _num = &mut *(num as *const i32 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:27:25
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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:29:20
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LL | let _num = *{ 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:31:9
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LL | *std::ptr::from_ref(num).cast_mut() += 1;
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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:33:9
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LL | *std::ptr::from_ref({ num }).cast_mut() += 1;
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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:35:9
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LL | *{ std::ptr::from_ref(num) }.cast_mut() += 1;
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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:37:9
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LL | *(std::ptr::from_ref({ num }) as *mut i32) += 1;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: aborting due to 10 previous errors
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