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resolve: Extend ambiguous_import_visibilities deprecation lint to glob-vs-glob ambiguities#154149

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resolve: Extend ambiguous_import_visibilities deprecation lint to glob-vs-glob ambiguities#154149
petrochenkov wants to merge 2 commits intorust-lang:mainfrom
petrochenkov:globvisglob

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@petrochenkov petrochenkov commented Mar 20, 2026 •
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Continuation of #149596, implementation of this comment #149596 (comment) in particular.
FCP for the lint in general - #149596 (comment).
#152498 is reverted as a part of the change, but fixes are applied to keep the tests added in that PR working.

To implement this we have to have to track the most and the least visible declarations in an ambiguous glob set.

Part of #153961.
r? @yaahc maybe

@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. labels Mar 20, 2026
petrochenkov
petrochenkov commented Mar 20, 2026
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compiler/rustc_middle/src/middle/privacy.rs
&& let ItemKind::Use(_, UseKind::Glob) = item.kind
{
// Glob import visibilities can be increasee by other
// more public glob imports in cases of ambiguity.
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This is a fix for #151124.

petrochenkov
petrochenkov commented Mar 20, 2026
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compiler/rustc_resolve/src/effective_visibilities.rs
tcx,
);
if let Some(max_vis_decl) = decl.ambiguity_vis_max.get() {
// Avoid the most visible import in an ambiguous glob set being reported as unused.
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This is a fix for #152004.

petrochenkov
petrochenkov commented Mar 20, 2026
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compiler/rustc_resolve/src/imports.rs

if let Some(binding) = resolution.binding()
&& old_decl != Some(binding)
&& (old_decl != Some(binding) || old_vis != Some(binding.vis()))
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And this is a fix for #152347.
Here we are triggering the glob re-fetching on visibility updates.

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rustbot commented Mar 20, 2026

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.

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petrochenkov commented Mar 20, 2026

@bors try

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rust-bors bot pushed a commit that referenced this pull request Mar 20, 2026
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Auto merge of #154149 - petrochenkov:globvisglob, r=<try>
4907eac 
resolve: Extend `ambiguous_import_visibilities` deprecation lint to glob-vs-glob ambiguities
@petrochenkov petrochenkov added S-waiting-on-crater Status: Waiting on a crater run to be completed. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 20, 2026
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rust-log-analyzer commented Mar 20, 2026

The job aarch64-gnu-llvm-21-2 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot) 
Executing "/scripts/stage_2_test_set2.sh"
+ /scripts/stage_2_test_set2.sh
PR_CI_JOB set; skipping tidy
+ '[' 1 == 1 ']'
+ echo 'PR_CI_JOB set; skipping tidy'
+ SKIP_TIDY='--skip tidy'
+ ../x.py --stage 2 test --skip tidy --skip tests --skip coverage-map --skip coverage-run --skip library --skip tidyselftest
##[group]Building bootstrap
    Finished `dev` profile [unoptimized] target(s) in 0.04s
##[endgroup]
downloading https://static.rust-lang.org/dist/2026-03-05/rustfmt-nightly-aarch64-unknown-linux-gnu.tar.xz
---

test result: FAILED. 69 passed; 1 failed; 3 ignored; 0 measured; 0 filtered out; finished in 1.02s

all doctests ran in 2.92s; merged doctests compilation took 1.87s
error: doctest failed, to rerun pass `-p rustc_lint_defs --doc`
Bootstrap failed while executing `--stage 2 test --skip tidy --skip tests --skip coverage-map --skip coverage-run --skip library --skip tidyselftest`
Build completed unsuccessfully in 0:29:37
  local time: Fri Mar 20 18:26:41 UTC 2026
  network time: Fri, 20 Mar 2026 18:26:41 GMT
##[error]Process completed with exit code 1.

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rust-bors bot commented Mar 20, 2026

☀️ Try build successful (CI)
Build commit: 4907eac (4907eac94165faff6c5e5e015670b1c584275f7b, parent: bfc05d6b072585dfd0c792ec1b8728c08a3511fe)

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petrochenkov commented Mar 20, 2026

@craterbot check

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craterbot commented Mar 20, 2026

👌 Experiment pr-154149 created and queued.
🤖 Automatically detected try build 4907eac
🔍 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

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