| error[E0080]: evaluation of constant value failed |
| --> $SRC_DIR/core/src/ptr/mod.rs:LL:COL |
| | |
| = note: unable to copy parts of a pointer from memory at ALLOC0 |
| | |
| note: inside `std::ptr::read::<MaybeUninit<MaybeUninit<u8>>>` |
| --> $SRC_DIR/core/src/ptr/mod.rs:LL:COL |
| note: inside `mem::swap_simple::<MaybeUninit<MaybeUninit<u8>>>` |
| --> $SRC_DIR/core/src/mem/mod.rs:LL:COL |
| note: inside `ptr::swap_nonoverlapping_simple_untyped::<MaybeUninit<u8>>` |
| --> $SRC_DIR/core/src/ptr/mod.rs:LL:COL |
| note: inside `swap_nonoverlapping::<MaybeUninit<u8>>` |
| --> $SRC_DIR/core/src/ptr/mod.rs:LL:COL |
| note: inside `X` |
| --> $DIR/missing_span_in_backtrace.rs:17:9 |
| | |
| 17 | / ptr::swap_nonoverlapping( |
| 18 | | &mut ptr1 as *mut _ as *mut MaybeUninit<u8>, |
| 19 | | &mut ptr2 as *mut _ as *mut MaybeUninit<u8>, |
| 20 | | mem::size_of::<&i32>(), |
| 21 | | ); |
| | |_________^ |
| = help: this code performed an operation that depends on the underlying bytes representing a pointer |
| = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported |
| |
| error: aborting due to previous error |
| |
| For more information about this error, try `rustc --explain E0080`. |