src/test/ui/consts/const-eval/ub-ref-ptr.64bit.stderr

   1 error[E0080]: it is undefined behavior to use this value
   2   --> $DIR/ub-ref-ptr.rs:13:1
   3    |
   4 LL | const UNALIGNED: &u16 = unsafe { mem::transmute(&[0u8; 4]) };
   5    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered an unaligned reference (required 2 byte alignment but found 1)
   6    |
   7    = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
   8    = note: the raw bytes of the constant (size: 8, align: 8) {
   9                ╾───────alloc2────────╼                         │ ╾──────╼
  10            }
  11
  12 error[E0080]: it is undefined behavior to use this value
  13   --> $DIR/ub-ref-ptr.rs:17:1
  14    |
  15 LL | const UNALIGNED_BOX: Box<u16> = unsafe { mem::transmute(&[0u8; 4]) };
  16    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered an unaligned box (required 2 byte alignment but found 1)
  17    |
  18    = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
  19    = note: the raw bytes of the constant (size: 8, align: 8) {
  20                ╾───────alloc6────────╼                         │ ╾──────╼
  21            }
  22
  23 error[E0080]: it is undefined behavior to use this value
  24   --> $DIR/ub-ref-ptr.rs:21:1
  25    |
  26 LL | const NULL: &u16 = unsafe { mem::transmute(0usize) };
  27    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered a null reference
  28    |
  29    = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
  30    = note: the raw bytes of the constant (size: 8, align: 8) {
  31                00 00 00 00 00 00 00 00                         │ ........
  32            }
  33
  34 error[E0080]: it is undefined behavior to use this value
  35   --> $DIR/ub-ref-ptr.rs:24:1
  36    |
  37 LL | const NULL_BOX: Box<u16> = unsafe { mem::transmute(0usize) };
  38    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered a null box
  39    |
  40    = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
  41    = note: the raw bytes of the constant (size: 8, align: 8) {
  42                00 00 00 00 00 00 00 00                         │ ........
  43            }
  44
  45 error[E0080]: it is undefined behavior to use this value
  46   --> $DIR/ub-ref-ptr.rs:30:1
  47    |
  48 LL | const REF_AS_USIZE: usize = unsafe { mem::transmute(&0) };
  49    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered pointer to alloc14, but expected initialized plain (non-pointer) bytes
  50    |
  51    = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
  52    = note: the raw bytes of the constant (size: 8, align: 8) {
  53                ╾───────alloc14───────╼                         │ ╾──────╼
  54            }
  55
  56 error[E0080]: it is undefined behavior to use this value
  57   --> $DIR/ub-ref-ptr.rs:33:1
  58    |
  59 LL | const REF_AS_USIZE_SLICE: &[usize] = &[unsafe { mem::transmute(&0) }];
  60    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered a pointer at .<deref>, but expected plain (non-pointer) bytes
  61    |
  62    = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
  63    = note: the raw bytes of the constant (size: 8, align: 8) {
  64                ╾───────alloc20───────╼                         │ ╾──────╼
  65            }
  66
  67 error[E0080]: it is undefined behavior to use this value
  68   --> $DIR/ub-ref-ptr.rs:36:1
  69    |
  70 LL | const REF_AS_USIZE_BOX_SLICE: Box<[usize]> = unsafe { mem::transmute::<&[usize], _>(&[mem::transmute(&0)]) };
  71    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered a pointer at .<deref>, but expected plain (non-pointer) bytes
  72    |
  73    = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
  74    = note: the raw bytes of the constant (size: 8, align: 8) {
  75                ╾───────alloc25───────╼                         │ ╾──────╼
  76            }
  77
  78 error[E0080]: it is undefined behavior to use this value
  79   --> $DIR/ub-ref-ptr.rs:39:1
  80    |
  81 LL | const USIZE_AS_REF: &'static u8 = unsafe { mem::transmute(1337usize) };
  82    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered a dangling reference (created from integer)
  83    |
  84    = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
  85    = note: the raw bytes of the constant (size: 8, align: 8) {
  86                39 05 00 00 00 00 00 00                         │ 9.......
  87            }
  88
  89 error[E0080]: it is undefined behavior to use this value
  90   --> $DIR/ub-ref-ptr.rs:42:1
  91    |
  92 LL | const USIZE_AS_BOX: Box<u8> = unsafe { mem::transmute(1337usize) };
  93    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered a dangling box (created from integer)
  94    |
  95    = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
  96    = note: the raw bytes of the constant (size: 8, align: 8) {
  97                39 05 00 00 00 00 00 00                         │ 9.......
  98            }
  99
 100 error[E0080]: it is undefined behavior to use this value
 101   --> $DIR/ub-ref-ptr.rs:45:1
 102    |
 103 LL | const UNINIT_PTR: *const i32 = unsafe { MaybeUninit { uninit: () }.init };
 104    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered uninitialized raw pointer
 105    |
 106    = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
 107    = note: the raw bytes of the constant (size: 8, align: 8) {
 108                __ __ __ __ __ __ __ __                         │ ░░░░░░░░
 109            }
 110
 111 error[E0080]: it is undefined behavior to use this value
 112   --> $DIR/ub-ref-ptr.rs:47:1
 113    |
 114 LL | const UNINIT_FN_PTR: fn() = unsafe { MaybeUninit { uninit: () }.init };
 115    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered uninitialized bytes, but expected a function pointer
 116    |
 117    = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
 118    = note: the raw bytes of the constant (size: 8, align: 8) {
 119                __ __ __ __ __ __ __ __                         │ ░░░░░░░░
 120            }
 121
 122 error: aborting due to 11 previous errors
 123
 124 For more information about this error, try `rustc --explain E0080`.