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error: Undefined Behavior: read access through <TAG> at ALLOC[0x0] is forbidden
--> tests/fail/both_borrows/outdated_local.rs:LL:CC
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LL | assert_eq!(unsafe { *y }, 1);
| ^^ Undefined Behavior occurred here
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= 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> has state Disabled which forbids this child read access
help: the accessed tag <TAG> was created here, in the initial state Frozen
--> tests/fail/both_borrows/outdated_local.rs:LL:CC
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LL | let y: *const i32 = &x;
| ^^
help: the accessed tag <TAG> later transitioned to Disabled due to a foreign write access at offsets [0x0..0x4]
--> tests/fail/both_borrows/outdated_local.rs:LL:CC
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LL | x = 1; // this invalidates y by reactivating the lowermost uniq borrow for this local
| ^^^^^
= help: this transition corresponds to a loss of read permissions
= note: BACKTRACE (of the first span):
= note: inside `main` at tests/fail/both_borrows/outdated_local.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
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