817adda794
Five of the files being skipped here are because rustfmt is buggy (see
the error messages below). The others have clearly preferable manual
formatting.
error[internal]: left behind trailing whitespace
--> tests/fail/validity/transmute_through_ptr.rs:18:18:1
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18 |
| ^^^^
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warning: rustfmt has failed to format. See previous 1 errors.
error[internal]: left behind trailing whitespace
--> tests/fail/stacked_borrows/illegal_read2.rs:10:10:1
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10 |
| ^^^^
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warning: rustfmt has failed to format. See previous 1 errors.
error[internal]: left behind trailing whitespace
--> tests/fail/stacked_borrows/illegal_read5.rs:15:15:1
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15 |
| ^^^^
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warning: rustfmt has failed to format. See previous 1 errors.
error[internal]: left behind trailing whitespace
--> tests/fail/stacked_borrows/illegal_read1.rs:10:10:1
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10 |
| ^^^^
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warning: rustfmt has failed to format. See previous 1 errors.
error[internal]: left behind trailing whitespace
--> tests/fail/erroneous_const2.rs:9:9:1
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9 |
| ^^^^
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warning: rustfmt has failed to format. See previous 1 errors.
19 lines
768 B
Rust
19 lines
768 B
Rust
// We *can* have aliasing &RefCell<T> and &mut T, but we cannot read through the former.
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// Else we couldn't optimize based on the assumption that `xref` below is truly unique.
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// normalize-stderr-test: "0x[0-9a-fA-F]+" -> "$$HEX"
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use std::cell::RefCell;
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use std::{mem, ptr};
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#[rustfmt::skip] // rustfmt bug: https://github.com/rust-lang/rustfmt/issues/5391
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fn main() {
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let rc = RefCell::new(0);
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let mut refmut = rc.borrow_mut();
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let xref: &mut i32 = &mut *refmut;
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let xshr = &rc; // creating this is ok
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let _val = *xref; // we can even still use our mutable reference
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mem::forget(unsafe { ptr::read(xshr) }); // but after reading through the shared ref
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let _val = *xref; // the mutable one is dead and gone
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//~^ ERROR borrow stack
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}
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