| error: Undefined Behavior: reading memory at ALLOC[0x0..0x8], but memory is uninitialized at [0x4..0x8], and this operation requires initialized memory |
| --> RUSTLIB/core/src/slice/cmp.rs:LL:CC |
| | |
| LL | let mut order = unsafe { compare_bytes(left.as_ptr(), right.as_ptr(), len) as isize }; |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ reading memory at ALLOC[0x0..0x8], but memory is uninitialized at [0x4..0x8], and this operation requires initialized memory |
| | |
| = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior |
| = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information |
| = note: BACKTRACE: |
| = note: inside `<u8 as core::slice::cmp::SliceOrd>::compare` at RUSTLIB/core/src/slice/cmp.rs:LL:CC |
| = note: inside `core::slice::cmp::<impl std::cmp::Ord for [u8]>::cmp` at RUSTLIB/core/src/slice/cmp.rs:LL:CC |
| note: inside `main` |
| --> $DIR/uninit_alloc_diagnostic_with_provenance.rs:LL:CC |
| | |
| LL | drop(slice1.cmp(slice2)); |
| | ^^^^^^^^^^^^^^^^^^ |
| |
| Uninitialized memory occurred at ALLOC[0x4..0x8], in this allocation: |
| ALLOC (Rust heap, size: 16, align: 8) { |
| ╾42[ALLOC]<TAG> (1 ptr byte)╼ 12 13 ╾43[ALLOC]<TAG> (1 ptr byte)╼ __ __ __ __ __ __ __ __ __ __ __ __ │ ━..━░░░░░░░░░░░░ |
| } |
| ALLOC (global (static or const), size: 1, align: 1) { |
| 2a │ * |
| } |
| ALLOC (global (static or const), size: 1, align: 1) { |
| 00 │ . |
| } |
| |
| note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace |
| |
| error: aborting due to 1 previous error |
| |
