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@Urgau Urgau commented Aug 22, 2023

This PR adds support for ptr::write and others for the invalid_reference_casting lint.

Detecting instances where instead of using the deref (*) operator to assign someone uses ptr::write, ptr::write_unaligned or ptr::write_volatile.

let data_len = 5u64;

std::ptr::write(
    std::mem::transmute::<*const u64, *mut u64>(&data_len),
    new_data_len,
);

r? @est31

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Aug 22, 2023
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est31 commented Aug 23, 2023

@bors r+ rollup

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bors commented Aug 23, 2023

📌 Commit 7ee77b5 has been approved by est31

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Aug 23, 2023
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Aug 23, 2023
…es, r=est31

Add support for `ptr::write`s for the `invalid_reference_casting` lint

This PR adds support for `ptr::write` and others for the `invalid_reference_casting` lint.

Detecting instances where instead of using the deref (`*`) operator to assign someone uses `ptr::write`, `ptr::write_unaligned` or `ptr::write_volatile`.

```rust
let data_len = 5u64;

std::ptr::write(
    std::mem::transmute::<*const u64, *mut u64>(&data_len),
    new_data_len,
);
```

r? `@est31`
bors added a commit to rust-lang-ci/rust that referenced this pull request Aug 23, 2023
Rollup of 7 pull requests

Successful merges:

 - rust-lang#114930 (Automatically add OS labels to std PRs)
 - rust-lang#115053 (docs: Add example, reference link for `type` keyword.)
 - rust-lang#115092 (Add generics_of to smir)
 - rust-lang#115096 (Add regression test for not `memcpy`ing padding bytes)
 - rust-lang#115100 (Add support for `ptr::write`s for the `invalid_reference_casting` lint)
 - rust-lang#115114 (Contents of reachable statics is reachable)
 - rust-lang#115122 (Fix clippy lint for identical `if`/`else` contraining `?` expressions)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 7257e9c into rust-lang:master Aug 23, 2023
@rustbot rustbot added this to the 1.74.0 milestone Aug 23, 2023
@Urgau Urgau deleted the invalid_ref_casting-ptr-writes branch August 23, 2023 09:13
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4 participants