Don't require T: RefUnwindSafe for vec::IntoIter<T>: UnwindSafe

[GrigorenkoPV]

Closes #144707

r? t-libs-api

[tgross35]

@rustbot label +I-libs-api-nominated

[Amanieu]

@rfcbot merge

[rust-rfcbot]

Team member @Amanieu has proposed to merge this. The next step is review by the rest of the tagged team members:

• @Amanieu
• @BurntSushi
• @dtolnay
• @joshtriplett
• @m-ou-se
• @the8472

No concerns currently listed.

Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!

See this document for info about what commands tagged team members can give me.

[rust-rfcbot]

🔔 This is now entering its final comment period, as per the review above. 🔔

[rustbot]

This PR was rebased onto a different master 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.

[rust-rfcbot]

The final comment period, with a disposition to merge, as per the review above, is now complete.

As the automated representative of the governance process, I would like to thank the author for their work and everyone else who contributed.

This will be merged soon.

[tgross35]

r? tgross35
@bors r+ rollup

[bors]

📌 Commit 144707a has been approved by tgross35

It is now in the queue for this repository.

[bors]

⌛ Testing commit 144707a with merge a8664a1...

[bors]

☀️ Test successful - checks-actions
Approved by: tgross35
Pushing a8664a1 to master...

[github-actions]

What is this?

This is an experimental post-merge analysis report that shows differences in test outcomes between the merged PR and its parent PR.

Comparing e517798 (parent) -> a8664a1 (this PR)

Test differences

Show 22 test diffs

22 doctest diffs were found. These are ignored, as they are noisy.

Test dashboard

Run

cargo run --manifest-path src/ci/citool/Cargo.toml -- \
    test-dashboard a8664a1534913ccff491937ec2dc7ec5d973c2bd --output-dir test-dashboard

And then open test-dashboard/index.html in your browser to see an overview of all executed tests.

Job duration changes

1. aarch64-apple: 11071.4s -> 7381.3s (-33.3%)
2. dist-aarch64-apple: 7138.3s -> 6001.0s (-15.9%)
3. tidy: 201.4s -> 171.6s (-14.8%)
4. dist-aarch64-windows-gnullvm: 4523.0s -> 5019.2s (11.0%)
5. dist-ohos-armv7: 3816.2s -> 4198.4s (10.0%)
6. dist-x86_64-windows-gnullvm: 4718.3s -> 5151.0s (9.2%)
7. dist-aarch64-msvc: 6072.3s -> 5516.8s (-9.1%)
8. dist-s390x-linux: 5002.8s -> 5434.5s (8.6%)
9. dist-loongarch64-musl: 5067.4s -> 5503.8s (8.6%)
10. dist-powerpc-linux: 4938.8s -> 5362.3s (8.6%)

How to interpret the job duration changes?

Job durations can vary a lot, based on the actual runner instance
that executed the job, system noise, invalidated caches, etc. The table above is provided
mostly for t-infra members, for simpler debugging of potential CI slow-downs.

[rust-timer]

Finished benchmarking commit (a8664a1): comparison URL.

Overall result: ❌ regressions - no action needed

@rustbot label: -perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.1%	[0.1%, 0.1%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

This benchmark run did not return any relevant results for this metric.

Cycles

Results (primary 2.2%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	2.2%	[2.2%, 2.2%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	2.2%	[2.2%, 2.2%]	1

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 475.08s -> 474.827s (-0.05%)
Artifact size: 390.51 MiB -> 390.49 MiB (-0.00%)