14e72e7ffa
Previous Stacked Borrows diagnostics were missing a lot of information about the state of the interpreter, and it was difficult to add additional state because it was threaded through all the intervening function signatures. This change factors a lot of the arguments which used to be passed individually to many stacked borrows functions into a single `DiagnosticCx`, which is built in `Stacks::for_each`, and since it wraps a handle to `AllocHistory`, we can now handle more nuanced things like heterogeneous borrow of `!Freeze` types.
34 lines
1.5 KiB
Plaintext
34 lines
1.5 KiB
Plaintext
error: Undefined Behavior: attempting a write access using <TAG> at ALLOC[0x0], but that tag only grants SharedReadOnly permission for this location
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--> $DIR/shr_frozen_violation1.rs:LL:CC
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LL | *(x as *const i32 as *mut i32) = 7;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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| |
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| attempting a write access using <TAG> at ALLOC[0x0], but that tag only grants SharedReadOnly permission for this location
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| this error occurs as part of an access at ALLOC[0x0..0x4]
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= help: this indicates a potential bug in the program: it performed an invalid operation, but the Stacked Borrows rules it violated are still experimental
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= help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md for further information
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help: <TAG> was created by a SharedReadOnly retag at offsets [0x0..0x4]
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--> $DIR/shr_frozen_violation1.rs:LL:CC
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LL | *(x as *const i32 as *mut i32) = 7;
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| ^
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= note: backtrace:
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= note: inside `unknown_code` at $DIR/shr_frozen_violation1.rs:LL:CC
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note: inside `foo` at $DIR/shr_frozen_violation1.rs:LL:CC
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--> $DIR/shr_frozen_violation1.rs:LL:CC
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LL | unknown_code(&*x);
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| ^^^^^^^^^^^^^^^^^
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note: inside `main` at $DIR/shr_frozen_violation1.rs:LL:CC
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--> $DIR/shr_frozen_violation1.rs:LL:CC
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LL | println!("{}", foo(&mut 0));
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| ^^^^^^^^^^^
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note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
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error: aborting due to previous error
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