| error: Undefined Behavior: trying to retag from <TAG> for Unique permission at ALLOC[0x0], but that tag does not exist in the borrow stack for this location |
| --> tests/fail/both_borrows/buggy_split_at_mut.rs:LL:CC |
| | |
| LL | / ( |
| LL | | from_raw_parts_mut(ptr, len - mid), // BUG: should be "mid" instead of "len - mid" |
| LL | | from_raw_parts_mut(ptr.offset(mid as isize), len - mid), |
| LL | | ) |
| | | ^ |
| | | | |
| | |_____________this error occurs as part of retag (of a reference/box inside this compound value) at ALLOC[0x0..0x10] |
| | errors for retagging in fields are fairly new; please reach out to us (e.g. at <https://rust-lang.zulipchat.com/#narrow/stream/269128-miri>) if you find this error troubling |
| | |
| = help: this indicates a potential bug in the program: it performed an invalid operation, but the Stacked Borrows rules it violated are still experimental |
| = help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md for further information |
| help: <TAG> was created by a Unique retag at offsets [0x0..0x10] |
| --> tests/fail/both_borrows/buggy_split_at_mut.rs:LL:CC |
| | |
| LL | from_raw_parts_mut(ptr, len - mid), // BUG: should be "mid" instead of "len - mid" |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| help: <TAG> was later invalidated at offsets [0x0..0x10] by a Unique retag |
| --> tests/fail/both_borrows/buggy_split_at_mut.rs:LL:CC |
| | |
| LL | from_raw_parts_mut(ptr.offset(mid as isize), len - mid), |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| = note: stack backtrace: |
| 0: safe::split_at_mut |
| at tests/fail/both_borrows/buggy_split_at_mut.rs:LL:CC |
| 1: main |
| at tests/fail/both_borrows/buggy_split_at_mut.rs:LL:CC |
| |
| note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace |
| |
| error: aborting due to 1 previous error |
| |
