Regression on nightly: unused pub(crate) use::*; is not actually unused

I encountered this while trying to bump Rust from nightly-2026-01-09 to nightly-2026-02-01 in Polars. The CI complains:

error: unused import: `polars_plan::prelude`
  --> crates/polars-lazy/src/prelude.rs:17:16
   |
17 | pub(crate) use polars_plan::prelude::*;
   |                ^^^^^^^^^^^^^^^^^^^^

However, this is a false positive, if one removes this line of code the crate fails to compile.

I briefly tried to re-create a minimal example that has the same issue but was unable to.

@petrochenkov

Bisecting leads me to believe this is related to #150502 and #150939. The unused warning starts after #150939.

cc @petrochenkov

Minimized:

mod m {
    pub struct S {}
}

use m::*;
pub use m::*; // warning: unused import: `m::*`

This is caused by 227e7bd.

I'll fix this issue (and probably #151124 as well) as a part of extending the ambiguous_import_visibilities lint to glob-vs-glob ambiguities.

@rustbot

@rustbot label -regression-from-stable-to-nightly -E-needs-mcve

Fixed in #152498.

Rollup merge of rust-lang#152498 - petrochenkov:revoverglob, r=jieyouxu

Unrolled build for #152498

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Regression on nightly: unused pub(crate) use::*; is not actually unused #152004

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Regression on nightly: unused pub(crate) use::*; is not actually unused #152004

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ehuss commented on Feb 2, 2026

petrochenkov commented on Feb 3, 2026

eggyal commented on Feb 3, 2026

rustbot commented on Feb 3, 2026

eggyal commented on Feb 3, 2026

petrochenkov commented on Feb 11, 2026

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