mir: validate `Move` call arguments are locals or box derefs by rabindra789 · Pull Request #160651 · rust-lang/rust

rabindra789 · 2026-08-06T18:01:48Z

This PR adds a MIR validation check for Move arguments passed to Call and TailCall terminators.
A moved argument should be either a local or the contents of the Box. Other places can deinitialize memory that codegen does not track correctly. The check is only enabled with -Zvalidate-mir, using the same phase restriction as the existing Copy check.
Added a regression test covering the invalid case.

rustbot · 2026-08-06T18:01:52Z

Some changes occurred to MIR optimizations

cc @rust-lang/wg-mir-opt

rustbot · 2026-08-06T18:01:54Z

r? @mati865

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oli-obk · 2026-08-07T10:07:17Z

r? @WaffleLapkin

rustbot · 2026-08-07T10:07:21Z

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rust-bors · 2026-08-26T17:32:37Z

📌 Commit 1154159 has been approved by WaffleLapkin

It is now in the queue for this repository.

…call-args, r=WaffleLapkin mir: validate `Move` call arguments are locals or box derefs Fixes rust-lang#103362. This PR adds a MIR validation check for `Move` arguments passed to `Call` and `TailCall` terminators. A moved argument should be either a local or the contents of the `Box`. Other places can deinitialize memory that codegen does not track correctly. The check is only enabled with `-Zvalidate-mir`, using the same phase restriction as the existing `Copy` check. Added a regression test covering the invalid case.

…uwer Rollup of 4 pull requests Successful merges: - #160651 (mir: validate `Move` call arguments are locals or box derefs) - #161736 (Tidy: show todo reason when lint fails (and fix the lint's tidy allow statement which was weird and broken...)) - #161052 (Add regression test for generic inference) - #161818 (Fix long type on diagnostics for conditionally implemented traits)

…r=WaffleLapkin mir: validate `Move` call arguments are locals or box derefs Fixes #103362. This PR adds a MIR validation check for `Move` arguments passed to `Call` and `TailCall` terminators. A moved argument should be either a local or the contents of the `Box`. Other places can deinitialize memory that codegen does not track correctly. The check is only enabled with `-Zvalidate-mir`, using the same phase restriction as the existing `Copy` check. Added a regression test covering the invalid case.

…uwer Rollup of 8 pull requests Successful merges: - #160505 (delegation: supporting inherent impls) - #160651 (mir: validate `Move` call arguments are locals or box derefs) - #161806 (Add tests and docs for `#[derive(GenericTypeVisitable)]`) - #161912 (run `extern "tail"` with `byval` argument test) - #162435 (windows-gnu: document libgcc requirement) - #162439 (Update books) - #162459 (docs(time): replace "method" with "function") - #162465 (Fix my duplicate thanks entry)

…call-args, r=WaffleLapkin mir: validate `Move` call arguments are locals or box derefs Fixes rust-lang#103362. This PR adds a MIR validation check for `Move` arguments passed to `Call` and `TailCall` terminators. A moved argument should be either a local or the contents of the `Box`. Other places can deinitialize memory that codegen does not track correctly. The check is only enabled with `-Zvalidate-mir`, using the same phase restriction as the existing `Copy` check. Added a regression test covering the invalid case.

…uwer Rollup of 10 pull requests Successful merges: - #162470 (Subtree sync for rustc_codegen_cranelift) - #160505 (delegation: supporting inherent impls) - #160651 (mir: validate `Move` call arguments are locals or box derefs) - #161806 (Add tests and docs for `#[derive(GenericTypeVisitable)]`) - #161912 (run `extern "tail"` with `byval` argument test) - #162435 (windows-gnu: document libgcc requirement) - #162439 (Update books) - #162451 (Add regression test for item-local diagnostic attribute lint levels) - #162459 (docs(time): replace "method" with "function") - #162465 (Fix my duplicate thanks entry)

…call-args, r=WaffleLapkin mir: validate `Move` call arguments are locals or box derefs Fixes rust-lang#103362. This PR adds a MIR validation check for `Move` arguments passed to `Call` and `TailCall` terminators. A moved argument should be either a local or the contents of the `Box`. Other places can deinitialize memory that codegen does not track correctly. The check is only enabled with `-Zvalidate-mir`, using the same phase restriction as the existing `Copy` check. Added a regression test covering the invalid case.

…uwer Rollup of 9 pull requests Successful merges: - #160505 (delegation: supporting inherent impls) - #160651 (mir: validate `Move` call arguments are locals or box derefs) - #161806 (Add tests and docs for `#[derive(GenericTypeVisitable)]`) - #161912 (run `extern "tail"` with `byval` argument test) - #162435 (windows-gnu: document libgcc requirement) - #162439 (Update books) - #162451 (Add regression test for item-local diagnostic attribute lint levels) - #162459 (docs(time): replace "method" with "function") - #162465 (Fix my duplicate thanks entry)

rust-bors · 2026-09-08T12:23:59Z

The bors config at rust-bors.toml is invalid in this PR. Parse error:

TOML parse error at line 87, column 5
   |
87 |     "arm64ami" = "latest-gha-runner-ami-arm64"
   |     ^
missing comma between key-value pairs, expected `,`

…uwer Rollup of 9 pull requests Successful merges: - #160505 (delegation: supporting inherent impls) - #160651 (mir: validate `Move` call arguments are locals or box derefs) - #161806 (Add tests and docs for `#[derive(GenericTypeVisitable)]`) - #161912 (run `extern "tail"` with `byval` argument test) - #162435 (windows-gnu: document libgcc requirement) - #162439 (Update books) - #162451 (Add regression test for item-local diagnostic attribute lint levels) - #162459 (docs(time): replace "method" with "function") - #162465 (Fix my duplicate thanks entry)

theemathas · 2026-09-08T13:07:34Z

Asked about the above error at https://rust-lang.zulipchat.com/#narrow/channel/242791-t-infra/topic/Invalid.20rust-bors.2Etoml.20error/with/622534709

rustbot · 2026-09-09T13:56:18Z

This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

theemathas · 2026-09-09T14:08:18Z

@bors r=WaffleLapkin

rust-bors · 2026-09-09T14:08:21Z

📌 Commit 1a533b6 has been approved by WaffleLapkin

It is now in the queue for this repository.

Rollup of 8 pull requests Successful merges: - #162412 (Fix msvc-specific differences in debuginfo tests) - #160651 (mir: validate `Move` call arguments are locals or box derefs) - #161946 (Generalise (most) impls on `Box`) - #162192 (normalize CoerceShared field types before relating) - #160518 (fix: fix no resolution for self import in namespaced crates) - #162509 (Avoid suggesting gated generic arguments for Fn-family traits) - #162521 (Don't explicitly specify `OnDuplicate::Error` as it is the default) - #162526 (yeet VisitorExt)

Rollup merge of #160651 - rabindra789:fix/mir-verifier-move-call-args, r=WaffleLapkin mir: validate `Move` call arguments are locals or box derefs Fixes #103362. This PR adds a MIR validation check for `Move` arguments passed to `Call` and `TailCall` terminators. A moved argument should be either a local or the contents of the `Box`. Other places can deinitialize memory that codegen does not track correctly. The check is only enabled with `-Zvalidate-mir`, using the same phase restriction as the existing `Copy` check. Added a regression test covering the invalid case.

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. labels Aug 6, 2026

rustbot assigned mati865 Aug 6, 2026

rabindra789 marked this pull request as draft August 6, 2026 18:27

rustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Aug 6, 2026

rabindra789 force-pushed the fix/mir-verifier-move-call-args branch from 6cf4605 to 1154159 Compare August 7, 2026 06:08

rabindra789 marked this pull request as ready for review August 7, 2026 06:17

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Aug 7, 2026

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theemathas mentioned this pull request Aug 16, 2026

mir: accept ambiguous unsize coercion validation results #161156

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WaffleLapkin approved these changes Aug 26, 2026

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Rollup of 4 pull requests #161829

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JonathanBrouwer mentioned this pull request Sep 8, 2026

Rollup of 8 pull requests #162466

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JonathanBrouwer mentioned this pull request Sep 8, 2026

Rollup of 10 pull requests #162472

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JonathanBrouwer mentioned this pull request Sep 8, 2026

Rollup of 9 pull requests #162474

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mir: validate Move call arguments are locals or box derefs

1a533b6

rabindra789 force-pushed the fix/mir-verifier-move-call-args branch from 98f4067 to 1a533b6 Compare September 9, 2026 13:56

theemathas added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Sep 9, 2026

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jhpratt mentioned this pull request Sep 9, 2026

Rollup of 8 pull requests #162550

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rust-bors Bot merged commit c217fd3 into rust-lang:main Sep 9, 2026
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