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
|
18 |
| ^^^^
|
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
|
10 |
| ^^^^
|
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
|
15 |
| ^^^^
|
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
|
10 |
| ^^^^
|
warning: rustfmt has failed to format. See previous 1 errors.
error[internal]: left behind trailing whitespace
--> tests/fail/erroneous_const2.rs:9:9:1
|
9 |
| ^^^^
|
warning: rustfmt has failed to format. See previous 1 errors.
20 lines
650 B
Rust
20 lines
650 B
Rust
// A callee may not read the destination of our `&mut` without
|
|
// us noticing.
|
|
|
|
#[rustfmt::skip] // rustfmt bug: https://github.com/rust-lang/rustfmt/issues/5391
|
|
fn main() {
|
|
let mut x = 15;
|
|
let xraw = &mut x as *mut _;
|
|
let xref = unsafe { &mut *xraw }; // derived from raw, so using raw is still ok...
|
|
callee(xraw);
|
|
let _val = *xref; // ...but any use of raw will invalidate our ref.
|
|
//~^ ERROR: borrow stack
|
|
}
|
|
|
|
fn callee(xraw: *mut i32) {
|
|
// We are a bit sneaky: We first create a shared ref, exploiting the reborrowing rules,
|
|
// and then we read through that.
|
|
let shr = unsafe { &*xraw };
|
|
let _val = *shr;
|
|
}
|