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.
41 lines
1.5 KiB
Plaintext
41 lines
1.5 KiB
Plaintext
error: Undefined Behavior: not granting access to tag <TAG> because incompatible item [Unique for <TAG>] is protected by call ID
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--> $DIR/illegal_write6.rs:LL:CC
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LL | unsafe { *y = 2 };
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| ^^^^^^ not granting access to tag <TAG> because incompatible item [Unique for <TAG>] is protected by call ID
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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 SharedReadWrite retag at offsets [0x0..0x4]
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--> $DIR/illegal_write6.rs:LL:CC
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LL | let p = x as *mut u32;
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| ^
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help: <TAG> was protected due to <TAG> which was created here
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--> $DIR/illegal_write6.rs:LL:CC
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LL | foo(x, p);
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| ^
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help: this protector is live for this call
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--> $DIR/illegal_write6.rs:LL:CC
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LL | / fn foo(a: &mut u32, y: *mut u32) -> u32 {
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LL | | *a = 1;
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LL | | let _b = &*a;
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LL | | unsafe { *y = 2 };
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LL | | return *a;
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LL | | }
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| |_^
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= note: backtrace:
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= note: inside `foo` at $DIR/illegal_write6.rs:LL:CC
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note: inside `main` at $DIR/illegal_write6.rs:LL:CC
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--> $DIR/illegal_write6.rs:LL:CC
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LL | foo(x, p);
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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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