| ────────────────────────────────────────────────── |
| Warning: this tree is indicative only. Some tags may have been hidden. |
| 0.. 4.. 8 |
| | Act | Act | └─┬──<TAG=root of the allocation> |
| | Frz |?Cel | └────<TAG=a> |
| ────────────────────────────────────────────────── |
| error: Undefined Behavior: write access through <TAG> (a) at ALLOC[0x0] is forbidden |
| --> tests/fail/tree_borrows/cell-inside-struct.rs:LL:CC |
| | |
| LL | (*a).field1 = 88; |
| | ^^^^^^^^^^^^^^^^ Undefined Behavior occurred here |
| | |
| = help: this indicates a potential bug in the program: it performed an invalid operation, but the Tree Borrows rules it violated are still experimental |
| = help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/tree-borrows.md for further information |
| = help: the accessed tag <TAG> (a) has state Frozen which forbids this child write access |
| help: the accessed tag <TAG> was created here, in the initial state Cell |
| --> tests/fail/tree_borrows/cell-inside-struct.rs:LL:CC |
| | |
| LL | let a = &root; |
| | ^^^^^ |
| = note: BACKTRACE (of the first span): |
| = note: inside `main` at tests/fail/tree_borrows/cell-inside-struct.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 |
| |
