rust/tests/fail/stacked_borrows/interior_mut2.stderr
2022-08-31 17:32:39 +02:00

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error: Undefined Behavior: trying to retag from <TAG> for SharedReadWrite permission at ALLOC[0x0], but that tag does not exist in the borrow stack for this location
--> $DIR/interior_mut2.rs:LL:CC
|
LL | let _val = *inner_shr.get();
| ^^^^^^^^^^^^^^^
| |
| trying to retag from <TAG> for SharedReadWrite 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..0x4]
|
= 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 SharedReadWrite retag at offsets [0x0..0x4]
--> $DIR/interior_mut2.rs:LL:CC
|
LL | let inner_shr = &*inner_uniq;
| ^^^^^^^^^^^^
help: <TAG> was later invalidated at offsets [0x0..0x4] by a write access
--> $DIR/interior_mut2.rs:LL:CC
|
LL | *c.get() = UnsafeCell::new(0); // now inner_shr gets invalidated
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: BACKTRACE:
= note: inside `main` at $DIR/interior_mut2.rs:LL:CC
note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
error: aborting due to previous error