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.
11 lines
337 B
Rust
11 lines
337 B
Rust
// Make sure that we cannot pass by argument a `&mut` that got already invalidated.
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fn foo(_: &mut i32) {}
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fn main() {
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let x = &mut 42;
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let xraw = x as *mut _;
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let xref = unsafe { &mut *xraw };
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let _val = unsafe { *xraw }; // invalidate xref
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foo(xref); //~ ERROR: /retag .* tag does not exist in the borrow stack/
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}
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