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Rollup merge of #105192 - estebank:point-at-lhs-on-binop, r=fee1-dead
[rust.git] / src / tools / miri / tests / fail / stacked_borrows / pointer_smuggling.stderr
1 error: Undefined Behavior: attempting a read access using <TAG> at ALLOC[0x0], but that tag does not exist in the borrow stack for this location
2   --> $DIR/pointer_smuggling.rs:LL:CC
3    |
4 LL |     let _x = unsafe { *PTR };
5    |                       ^^^^
6    |                       |
7    |                       attempting a read access using <TAG> at ALLOC[0x0], but that tag does not exist in the borrow stack for this location
8    |                       this error occurs as part of an access at ALLOC[0x0..0x1]
9    |
10    = help: this indicates a potential bug in the program: it performed an invalid operation, but the Stacked Borrows rules it violated are still experimental
11    = help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md for further information
12 help: <TAG> was created by a SharedReadWrite retag at offsets [0x0..0x1]
13   --> $DIR/pointer_smuggling.rs:LL:CC
14    |
15 LL |         PTR = x;
16    |               ^
17 help: <TAG> was later invalidated at offsets [0x0..0x1] by a write access
18   --> $DIR/pointer_smuggling.rs:LL:CC
19    |
20 LL |     *val = 2; // this invalidates any raw ptrs `fun1` might have created.
21    |     ^^^^^^^^
22    = note: BACKTRACE:
23    = note: inside `fun2` at $DIR/pointer_smuggling.rs:LL:CC
24 note: inside `main`
25   --> $DIR/pointer_smuggling.rs:LL:CC
26    |
27 LL |     fun2(); // if they now use a raw ptr they break our reference
28    |     ^^^^^^
29
30 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
31
32 error: aborting due to previous error
33