| //@ run-fail |
| //@ error-pattern:index out of bounds |
| //@ ignore-emscripten no processes |
| |
| use std::mem; |
| |
| fn main() { |
| |
| // This should cause a bounds-check panic, but may not if we do our |
| // bounds checking by comparing the scaled index to the vector's |
| // address-bounds, since we've scaled the index to wrap around to the |
| // address of the 0th cell in the array (even though the index is |
| // huge). |
| |
| let x = vec![1_usize, 2_usize, 3_usize]; |
| |
| let base = x.as_ptr() as usize; |
| let idx = base / mem::size_of::<usize>(); |
| println!("ov1 base = 0x{:x}", base); |
| println!("ov1 idx = 0x{:x}", idx); |
| println!("ov1 sizeof::<usize>() = 0x{:x}", mem::size_of::<usize>()); |
| println!("ov1 idx * sizeof::<usize>() = 0x{:x}", |
| idx * mem::size_of::<usize>()); |
| |
| // This should panic. |
| println!("ov1 0x{:x}", x[idx]); |
| } |
