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

   1 error[E0080]: it is undefined behavior to use this value
   2   --> $DIR/ub-wide-ptr.rs:38:1
   3    |
   4 LL | const STR_TOO_LONG: &str = unsafe { mem::transmute((&42u8, 999usize)) };
   5    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered a dangling reference (going beyond the bounds of its allocation)
   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: 16, align: 8) {
   9                ╾───────allocN────────╼ e7 03 00 00 00 00 00 00 │ ╾──────╼........
  10            }
  11
  12 error[E0080]: it is undefined behavior to use this value
  13   --> $DIR/ub-wide-ptr.rs:40:1
  14    |
  15 LL | const NESTED_STR_MUCH_TOO_LONG: (&str,) = (unsafe { mem::transmute((&42, usize::MAX)) },);
  16    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered invalid reference metadata: slice is bigger than largest supported object at .0
  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: 16, align: 8) {
  20                ╾───────allocN───────╼ ff ff ff ff ff ff ff ff │ ╾──────╼........
  21            }
  22
  23 error[E0080]: it is undefined behavior to use this value
  24   --> $DIR/ub-wide-ptr.rs:43:1
  25    |
  26 LL | const STR_LENGTH_PTR: &str = unsafe { mem::transmute((&42u8, &3)) };
  27    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered non-integer slice length in wide pointer
  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: 16, align: 8) {
  31                ╾───────allocN───────╼ ╾───────allocN───────╼ │ ╾──────╼╾──────╼
  32            }
  33
  34 error[E0080]: it is undefined behavior to use this value
  35   --> $DIR/ub-wide-ptr.rs:46:1
  36    |
  37 LL | const MY_STR_LENGTH_PTR: &MyStr = unsafe { mem::transmute((&42u8, &3)) };
  38    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered non-integer slice length in wide pointer
  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: 16, align: 8) {
  42                ╾───────allocN───────╼ ╾───────allocN───────╼ │ ╾──────╼╾──────╼
  43            }
  44
  45 error[E0080]: it is undefined behavior to use this value
  46   --> $DIR/ub-wide-ptr.rs:48:1
  47    |
  48 LL | const MY_STR_MUCH_TOO_LONG: &MyStr = unsafe { mem::transmute((&42u8, usize::MAX)) };
  49    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered invalid reference metadata: slice is bigger than largest supported object
  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: 16, align: 8) {
  53                ╾───────allocN───────╼ ff ff ff ff ff ff ff ff │ ╾──────╼........
  54            }
  55
  56 error[E0080]: it is undefined behavior to use this value
  57   --> $DIR/ub-wide-ptr.rs:52:1
  58    |
  59 LL | const STR_NO_INIT: &str = unsafe { mem::transmute::<&[_], _>(&[MaybeUninit::<u8> { uninit: () }]) };
  60    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered uninitialized data in `str` at .<deref>
  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: 16, align: 8) {
  64                ╾───────allocN───────╼ 01 00 00 00 00 00 00 00 │ ╾──────╼........
  65            }
  66
  67 error[E0080]: it is undefined behavior to use this value
  68   --> $DIR/ub-wide-ptr.rs:55:1
  69    |
  70 LL | const MYSTR_NO_INIT: &MyStr = unsafe { mem::transmute::<&[_], _>(&[MaybeUninit::<u8> { uninit: () }]) };
  71    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered uninitialized data in `str` at .<deref>.0
  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: 16, align: 8) {
  75                ╾───────allocN───────╼ 01 00 00 00 00 00 00 00 │ ╾──────╼........
  76            }
  77
  78 error[E0080]: it is undefined behavior to use this value
  79   --> $DIR/ub-wide-ptr.rs:62:1
  80    |
  81 LL | / const SLICE_LENGTH_UNINIT: &[u8] = unsafe {
  82 LL | |
  83 LL | |     let uninit_len = MaybeUninit::<usize> { uninit: () };
  84 LL | |     mem::transmute((42, uninit_len))
  85 LL | | };
  86    | |__^ type validation failed: encountered uninitialized reference
  87    |
  88    = 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.
  89    = note: the raw bytes of the constant (size: 16, align: 8) {
  90                __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░
  91            }
  92
  93 error[E0080]: it is undefined behavior to use this value
  94   --> $DIR/ub-wide-ptr.rs:68:1
  95    |
  96 LL | const SLICE_TOO_LONG: &[u8] = unsafe { mem::transmute((&42u8, 999usize)) };
  97    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered a dangling reference (going beyond the bounds of its allocation)
  98    |
  99    = 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.
 100    = note: the raw bytes of the constant (size: 16, align: 8) {
 101                ╾───────allocN───────╼ e7 03 00 00 00 00 00 00 │ ╾──────╼........
 102            }
 103
 104 error[E0080]: it is undefined behavior to use this value
 105   --> $DIR/ub-wide-ptr.rs:71:1
 106    |
 107 LL | const SLICE_LENGTH_PTR: &[u8] = unsafe { mem::transmute((&42u8, &3)) };
 108    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered non-integer slice length in wide pointer
 109    |
 110    = 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.
 111    = note: the raw bytes of the constant (size: 16, align: 8) {
 112                ╾───────allocN───────╼ ╾───────allocN───────╼ │ ╾──────╼╾──────╼
 113            }
 114
 115 error[E0080]: it is undefined behavior to use this value
 116   --> $DIR/ub-wide-ptr.rs:74:1
 117    |
 118 LL | const SLICE_TOO_LONG_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, 999usize)) };
 119    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered a dangling box (going beyond the bounds of its allocation)
 120    |
 121    = 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.
 122    = note: the raw bytes of the constant (size: 16, align: 8) {
 123                ╾───────allocN───────╼ e7 03 00 00 00 00 00 00 │ ╾──────╼........
 124            }
 125
 126 error[E0080]: it is undefined behavior to use this value
 127   --> $DIR/ub-wide-ptr.rs:77:1
 128    |
 129 LL | const SLICE_LENGTH_PTR_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, &3)) };
 130    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered non-integer slice length in wide pointer
 131    |
 132    = 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.
 133    = note: the raw bytes of the constant (size: 16, align: 8) {
 134                ╾───────allocN───────╼ ╾───────allocN───────╼ │ ╾──────╼╾──────╼
 135            }
 136
 137 error[E0080]: it is undefined behavior to use this value
 138   --> $DIR/ub-wide-ptr.rs:81:1
 139    |
 140 LL | const SLICE_CONTENT_INVALID: &[bool] = &[unsafe { mem::transmute(3u8) }];
 141    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered 0x03 at .<deref>[0], but expected a boolean
 142    |
 143    = 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.
 144    = note: the raw bytes of the constant (size: 8, align: 8) {
 145                ╾───────allocN───────╼                         │ ╾──────╼
 146            }
 147
 148 error[E0080]: it is undefined behavior to use this value
 149   --> $DIR/ub-wide-ptr.rs:87:1
 150    |
 151 LL | const MYSLICE_PREFIX_BAD: &MySliceBool = &MySlice(unsafe { mem::transmute(3u8) }, [false]);
 152    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered 0x03 at .<deref>.0, but expected a boolean
 153    |
 154    = 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.
 155    = note: the raw bytes of the constant (size: 8, align: 8) {
 156                ╾───────allocN───────╼                         │ ╾──────╼
 157            }
 158
 159 error[E0080]: it is undefined behavior to use this value
 160   --> $DIR/ub-wide-ptr.rs:90:1
 161    |
 162 LL | const MYSLICE_SUFFIX_BAD: &MySliceBool = &MySlice(true, [unsafe { mem::transmute(3u8) }]);
 163    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered 0x03 at .<deref>.1[0], but expected a boolean
 164    |
 165    = 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.
 166    = note: the raw bytes of the constant (size: 8, align: 8) {
 167                ╾───────allocN───────╼                         │ ╾──────╼
 168            }
 169
 170 error[E0080]: it is undefined behavior to use this value
 171   --> $DIR/ub-wide-ptr.rs:97:1
 172    |
 173 LL | / const RAW_SLICE_LENGTH_UNINIT: *const [u8] = unsafe {
 174 LL | |
 175 LL | |     let uninit_len = MaybeUninit::<usize> { uninit: () };
 176 LL | |     mem::transmute((42, uninit_len))
 177 LL | | };
 178    | |__^ type validation failed: encountered uninitialized raw pointer
 179    |
 180    = 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.
 181    = note: the raw bytes of the constant (size: 16, align: 8) {
 182                __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░
 183            }
 184
 185 error[E0080]: it is undefined behavior to use this value
 186   --> $DIR/ub-wide-ptr.rs:105:1
 187    |
 188 LL | const TRAIT_OBJ_SHORT_VTABLE_1: W<&dyn Trait> = unsafe { mem::transmute(W((&92u8, &3u8))) };
 189    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered too small vtable at .0
 190    |
 191    = 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.
 192    = note: the raw bytes of the constant (size: 16, align: 8) {
 193                ╾──────allocN───────╼ ╾──────allocN───────╼ │ ╾──────╼╾──────╼
 194            }
 195
 196 error[E0080]: it is undefined behavior to use this value
 197   --> $DIR/ub-wide-ptr.rs:108:1
 198    |
 199 LL | const TRAIT_OBJ_SHORT_VTABLE_2: W<&dyn Trait> = unsafe { mem::transmute(W((&92u8, &3u64))) };
 200    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered too small vtable at .0
 201    |
 202    = 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.
 203    = note: the raw bytes of the constant (size: 16, align: 8) {
 204                ╾──────allocN───────╼ ╾──────allocN───────╼ │ ╾──────╼╾──────╼
 205            }
 206
 207 error[E0080]: it is undefined behavior to use this value
 208   --> $DIR/ub-wide-ptr.rs:111:1
 209    |
 210 LL | const TRAIT_OBJ_INT_VTABLE: W<&dyn Trait> = unsafe { mem::transmute(W((&92u8, 4usize))) };
 211    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered dangling vtable pointer in wide pointer at .0
 212    |
 213    = 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.
 214    = note: the raw bytes of the constant (size: 16, align: 8) {
 215                ╾──────allocN───────╼ 04 00 00 00 00 00 00 00 │ ╾──────╼........
 216            }
 217
 218 error[E0080]: it is undefined behavior to use this value
 219   --> $DIR/ub-wide-ptr.rs:113:1
 220    |
 221 LL | const TRAIT_OBJ_UNALIGNED_VTABLE: &dyn Trait = unsafe { mem::transmute((&92u8, &[0u8; 128])) };
 222    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered unaligned vtable pointer in wide pointer
 223    |
 224    = 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.
 225    = note: the raw bytes of the constant (size: 16, align: 8) {
 226                ╾──────allocN───────╼ ╾──────allocN───────╼ │ ╾──────╼╾──────╼
 227            }
 228
 229 error[E0080]: it is undefined behavior to use this value
 230   --> $DIR/ub-wide-ptr.rs:115:1
 231    |
 232 LL | const TRAIT_OBJ_BAD_DROP_FN_NULL: &dyn Trait = unsafe { mem::transmute((&92u8, &[0usize; 8])) };
 233    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered invalid drop function pointer in vtable (not pointing to a function)
 234    |
 235    = 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.
 236    = note: the raw bytes of the constant (size: 16, align: 8) {
 237                ╾──────allocN───────╼ ╾──────allocN───────╼ │ ╾──────╼╾──────╼
 238            }
 239
 240 error[E0080]: it is undefined behavior to use this value
 241   --> $DIR/ub-wide-ptr.rs:117:1
 242    |
 243 LL | const TRAIT_OBJ_BAD_DROP_FN_INT: &dyn Trait = unsafe { mem::transmute((&92u8, &[1usize; 8])) };
 244    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered invalid drop function pointer in vtable (not pointing to a function)
 245    |
 246    = 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.
 247    = note: the raw bytes of the constant (size: 16, align: 8) {
 248                ╾──────allocN───────╼ ╾──────allocN───────╼ │ ╾──────╼╾──────╼
 249            }
 250
 251 error[E0080]: it is undefined behavior to use this value
 252   --> $DIR/ub-wide-ptr.rs:119:1
 253    |
 254 LL | const TRAIT_OBJ_BAD_DROP_FN_NOT_FN_PTR: W<&dyn Trait> = unsafe { mem::transmute(W((&92u8, &[&42u8; 8]))) };
 255    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered invalid drop function pointer in vtable (not pointing to a function) at .0
 256    |
 257    = 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.
 258    = note: the raw bytes of the constant (size: 16, align: 8) {
 259                ╾──────allocN───────╼ ╾──────allocN───────╼ │ ╾──────╼╾──────╼
 260            }
 261
 262 error[E0080]: it is undefined behavior to use this value
 263   --> $DIR/ub-wide-ptr.rs:123:1
 264    |
 265 LL | const TRAIT_OBJ_CONTENT_INVALID: &dyn Trait = unsafe { mem::transmute::<_, &bool>(&3u8) };
 266    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered 0x03 at .<deref>.<dyn-downcast>, but expected a boolean
 267    |
 268    = 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.
 269    = note: the raw bytes of the constant (size: 16, align: 8) {
 270                ╾──────allocN───────╼ ╾──────allocN───────╼ │ ╾──────╼╾──────╼
 271            }
 272
 273 error[E0080]: it is undefined behavior to use this value
 274   --> $DIR/ub-wide-ptr.rs:127:1
 275    |
 276 LL | const RAW_TRAIT_OBJ_VTABLE_NULL: *const dyn Trait = unsafe { mem::transmute((&92u8, 0usize)) };
 277    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered dangling vtable pointer in wide pointer
 278    |
 279    = 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.
 280    = note: the raw bytes of the constant (size: 16, align: 8) {
 281                ╾──────allocN───────╼ 00 00 00 00 00 00 00 00 │ ╾──────╼........
 282            }
 283
 284 error[E0080]: it is undefined behavior to use this value
 285   --> $DIR/ub-wide-ptr.rs:129:1
 286    |
 287 LL | const RAW_TRAIT_OBJ_VTABLE_INVALID: *const dyn Trait = unsafe { mem::transmute((&92u8, &3u64)) };
 288    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered too small vtable
 289    |
 290    = 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.
 291    = note: the raw bytes of the constant (size: 16, align: 8) {
 292                ╾──────allocN───────╼ ╾──────allocN───────╼ │ ╾──────╼╾──────╼
 293            }
 294
 295 error[E0080]: could not evaluate static initializer
 296   --> $DIR/ub-wide-ptr.rs:135:5
 297    |
 298 LL |     mem::transmute::<_, &dyn Trait>((&92u8, 0usize))
 299    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ null pointer is not a valid pointer for this operation
 300
 301 error[E0080]: could not evaluate static initializer
 302   --> $DIR/ub-wide-ptr.rs:139:5
 303    |
 304 LL |     mem::transmute::<_, &dyn Trait>((&92u8, &3u64))
 305    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ memory access failed: pointer must be in-bounds at offset N, but is outside bounds of allocN which has size N
 306
 307 error: aborting due to 28 previous errors
 308
 309 For more information about this error, try `rustc --explain E0080`.