privacy: Fix type privacy holes in RPITITs by petrochenkov · Pull Request #152543 · rust-lang/rust

petrochenkov · 2026-02-12T15:36:53Z

A subset of #146470.

Private types in RPITITs now report hard errors.
Private types in bounds of associated types still only report the private_bounds lint due to unacceptable amount of breakage (#146470 (comment)).

Closes #144139

petrochenkov · 2026-02-12T15:37:12Z

@bors try

privacy: Fix type privacy holes when it doesn't cause too much breakage

petrochenkov · 2026-02-12T15:38:01Z

TODO: @craterbot check p=1 crates=https://crater-reports.s3.amazonaws.com/pr-146470-3/retry-regressed-list.txt

rustbot · 2026-02-12T15:38:12Z

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rust-bors · 2026-02-12T17:49:21Z

☀️ Try build successful (CI)
Build commit: fcfb0ff (fcfb0ffc7ed7fc631df1136063939ef648434735, parent: 7ad4e69ad585d8ff214f7b42d01f1959eda08f40)

petrochenkov · 2026-02-12T17:58:45Z

@craterbot check p=1 crates=https://crater-reports.s3.amazonaws.com/pr-146470-3/retry-regressed-list.txt

craterbot · 2026-02-12T17:58:49Z

👌 Experiment pr-152543 created and queued.
🤖 Automatically detected try build fcfb0ff
🔍 You can check out the queue and this experiment's details.

ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

craterbot · 2026-02-12T17:59:43Z

🚧 Experiment pr-152543 is now running

ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

craterbot · 2026-02-12T20:35:45Z

🎉 Experiment pr-152543 is completed!
📊 27 regressed and 0 fixed (5514 total)
📊 267 spurious results on the retry-regressed-list.txt, consider a retry¹ if this is a significant amount.
📰 Open the summary report.

⚠️ If you notice any spurious failure please add them to the denylist!
ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

re-run the experiment with crates=https://crater-reports.s3.amazonaws.com/pr-152543/retry-regressed-list.txt ↩

petrochenkov · 2026-02-13T12:12:43Z

Crater results are basically the same as #146470 without the second commit (see e.g. #146470 (comment)).

petrochenkov · 2026-02-13T12:14:52Z

Previous FCP - #146470 (comment).

rust-rfcbot · 2026-03-21T16:00:21Z

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.

fmease

This PR leads to quite a few breakages but it seems too tricky and arduous to send downstream patches, unfortunately. @bors r+

View changes since this review

rust-bors · 2026-03-22T16:24:18Z

📌 Commit ef8c95c has been approved by fmease

It is now in the queue for this repository.

privacy: Fix type privacy holes in RPITITs A subset of rust-lang#146470. Private types in RPITITs now report hard errors. Private types in bounds of associated types still only report the `private_bounds` lint due to unacceptable amount of breakage (rust-lang#146470 (comment)). Closes rust-lang#144139

…uwer Rollup of 22 pull requests Successful merges: - #122668 (Add APIs for dealing with titlecase) - #152543 (privacy: Fix type privacy holes in RPITITs) - #153107 (Optimize BTreeMap::append() using CursorMut) - #153312 (Packages as namespaces part 1) - #153534 (Remove a flaky `got_timeout` assert from two channel tests) - #153718 (Fix environ on FreeBSD with cdylib targets that use -Wl,--no-undefined .) - #153857 (Rename `target.abi` to `target.cfg_abi` and enum-ify llvm_abiname) - #153880 (Lifted intersperse and intersperse_with Fused transformation and updated documentation + tests) - #153931 (remove usages of to-be-deprecated numeric constants) - #150630 (Unknown -> Unsupported compression algorithm) - #153491 (Move `freeze_*` methods to `OpenOptionsExt2`) - #153582 (Simplify find_attr! for HirId usage) - #153623 (std: move `sys::pal::os` to `sys::paths`) - #153647 (docs(fs): Clarify That File::lock Coordinates Across Processes) - #153936 (Skip stack_start_aligned for immediate-abort) - #154011 (implement `BinaryHeap::as_mut_slice`) - #154167 (ui/lto: move and rename two tests from issues/) - #154174 (allow `incomplete_features` in most UI tests) - #154175 (Add new alias for Guillaume Gomez email address) - #154182 (diagnostics: avoid ICE for undeclared generic parameter in impl) - #154188 (Update the tracking issue for #[diagnostic::on_move]) - #154201 (Use enums to clarify `DepNodeColorMap` color marking )

…uwer Rollup of 21 pull requests Successful merges: - #152543 (privacy: Fix type privacy holes in RPITITs) - #153107 (Optimize BTreeMap::append() using CursorMut) - #153312 (Packages as namespaces part 1) - #153534 (Remove a flaky `got_timeout` assert from two channel tests) - #153718 (Fix environ on FreeBSD with cdylib targets that use -Wl,--no-undefined .) - #153857 (Rename `target.abi` to `target.cfg_abi` and enum-ify llvm_abiname) - #153880 (Lifted intersperse and intersperse_with Fused transformation and updated documentation + tests) - #153931 (remove usages of to-be-deprecated numeric constants) - #150630 (Unknown -> Unsupported compression algorithm) - #153491 (Move `freeze_*` methods to `OpenOptionsExt2`) - #153582 (Simplify find_attr! for HirId usage) - #153623 (std: move `sys::pal::os` to `sys::paths`) - #153647 (docs(fs): Clarify That File::lock Coordinates Across Processes) - #153936 (Skip stack_start_aligned for immediate-abort) - #154011 (implement `BinaryHeap::as_mut_slice`) - #154167 (ui/lto: move and rename two tests from issues/) - #154174 (allow `incomplete_features` in most UI tests) - #154175 (Add new alias for Guillaume Gomez email address) - #154182 (diagnostics: avoid ICE for undeclared generic parameter in impl) - #154188 (Update the tracking issue for #[diagnostic::on_move]) - #154201 (Use enums to clarify `DepNodeColorMap` color marking )

…uwer Rollup of 21 pull requests Successful merges: - rust-lang/rust#152543 (privacy: Fix type privacy holes in RPITITs) - rust-lang/rust#153107 (Optimize BTreeMap::append() using CursorMut) - rust-lang/rust#153312 (Packages as namespaces part 1) - rust-lang/rust#153534 (Remove a flaky `got_timeout` assert from two channel tests) - rust-lang/rust#153718 (Fix environ on FreeBSD with cdylib targets that use -Wl,--no-undefined .) - rust-lang/rust#153857 (Rename `target.abi` to `target.cfg_abi` and enum-ify llvm_abiname) - rust-lang/rust#153880 (Lifted intersperse and intersperse_with Fused transformation and updated documentation + tests) - rust-lang/rust#153931 (remove usages of to-be-deprecated numeric constants) - rust-lang/rust#150630 (Unknown -> Unsupported compression algorithm) - rust-lang/rust#153491 (Move `freeze_*` methods to `OpenOptionsExt2`) - rust-lang/rust#153582 (Simplify find_attr! for HirId usage) - rust-lang/rust#153623 (std: move `sys::pal::os` to `sys::paths`) - rust-lang/rust#153647 (docs(fs): Clarify That File::lock Coordinates Across Processes) - rust-lang/rust#153936 (Skip stack_start_aligned for immediate-abort) - rust-lang/rust#154011 (implement `BinaryHeap::as_mut_slice`) - rust-lang/rust#154167 (ui/lto: move and rename two tests from issues/) - rust-lang/rust#154174 (allow `incomplete_features` in most UI tests) - rust-lang/rust#154175 (Add new alias for Guillaume Gomez email address) - rust-lang/rust#154182 (diagnostics: avoid ICE for undeclared generic parameter in impl) - rust-lang/rust#154188 (Update the tracking issue for #[diagnostic::on_move]) - rust-lang/rust#154201 (Use enums to clarify `DepNodeColorMap` color marking )

theemathas · 2026-04-30T08:31:59Z

The beta crater run found a few more crates affected by the regression that weren't caught in this PR's crater run:

I'm going to assume that these are accepted regressions.

Edit: And some more breakages from the rustdoc beta crater run:

traviscross · 2026-05-06T06:35:56Z

The Reference doesn't, I think, document enough here to have needed an update.

cc @rust-lang/lang-docs @rust-lang/fls

privacy: Fix type privacy holes when it doesn't cause too much breakage

ef8c95c

rustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Feb 12, 2026

rust-bors Bot pushed a commit that referenced this pull request Feb 12, 2026

Auto merge of #152543 - petrochenkov:rprivtit2, r=<try>

fcfb0ff

privacy: Fix type privacy holes when it doesn't cause too much breakage

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petrochenkov marked this pull request as ready for review February 12, 2026 15:38

rustbot added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Feb 12, 2026

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This was referenced Feb 12, 2026

Revert "Do not check privacy for RPITIT." #146470

Closed

(re-)Fix private-in-public for RPITIT #144139

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traviscross added the I-lang-radar Items that are on lang's radar and will need eventual work or consideration. label Feb 12, 2026

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rustbot mentioned this pull request Mar 21, 2026

Tracking issue for release notes of #152543: privacy: Fix type privacy holes in RPITITs #154180

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fmease added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-t-lang Status: Awaiting decision from T-lang labels Mar 22, 2026

fmease changed the title ~~privacy: Fix type privacy holes when it doesn't cause too much breakage~~ privacy: Fix type privacy holes in RPITITs Mar 22, 2026

fmease approved these changes Mar 22, 2026

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JonathanBrouwer mentioned this pull request Mar 22, 2026

Rollup of 13 pull requests #154219

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JonathanBrouwer mentioned this pull request Mar 22, 2026

Rollup of 23 pull requests #154226

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JonathanBrouwer mentioned this pull request Mar 22, 2026

Rollup of 22 pull requests #154227

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JonathanBrouwer mentioned this pull request Mar 23, 2026

Rollup of 21 pull requests #154255

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rust-bors Bot merged commit b20e49f into rust-lang:main Mar 23, 2026
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rustbot added this to the 1.96.0 milestone Mar 23, 2026

Copilot AI mentioned this pull request Apr 10, 2026

Add CI job for Linux g++ with latest nightly Rust HKalbasi/zngur#114

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BoxyUwU mentioned this pull request May 12, 2026

Draft release notes for 1.96.0 #156512

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