rust/tests/fail/stacked_borrows/buggy_split_at_mut.stderr
2022-08-31 17:32:39 +02:00

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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
--> $DIR/buggy_split_at_mut.rs:LL:CC
|
LL | let (a, b) = safe::split_at_mut(&mut array, 0);
| ^
| |
| trying to retag from <TAG> for Unique permission at ALLOC[0x0], but that tag does not exist in the borrow stack for this location
| this error occurs as part of retag at ALLOC[0x0..0x10]
|
= 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]
--> $DIR/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
--> $DIR/buggy_split_at_mut.rs:LL:CC
|
LL | from_raw_parts_mut(ptr.offset(mid as isize), len - mid),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: BACKTRACE:
= note: inside `main` at $DIR/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 previous error