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1.100 beta crater regression: "can't find crate for yote_recordstore_rust" #164086

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rust-lang/cargo
#17589
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1.100 beta crater regression: "can't find crate for yote_recordstore_rust"#164086
rust-lang/cargo
#17589
Labels
A-cratesArea: Crates and their interactions (like crate loading)A-proc-macrosArea: Procedural macrosC-bugCategory: This is a bug.I-cargo-nominatedNominated for discussion during a cargo team meeting.S-has-bisectionStatus: A bisection has been found for this issueS-has-mcveStatus: A Minimal Complete and Verifiable Example has been found for this issueT-cargoRelevant to the cargo team, which will review and decide on the PR/issue.regression-from-stable-to-betaPerformance or correctness regression from stable to beta.

Description

@theemathas
theemathas
opened on Oct 10, 2026

This regression was discovered in the 1.100 beta crater run.

[INFO] [stdout] error[E0463]: can't find crate for `yote_recordstore_rust`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use yote_recordstore_rust::object_store::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.

https://crater-reports.s3.amazonaws.com/beta-1.100-3/1.100.0-beta.1/gh/ewolf.rust_object_store/log.txt

Activity

  1. theemathas
    added
    regression-from-stable-to-betaPerformance or correctness regression from stable to beta.
    C-bugCategory: This is a bug.
    E-needs-bisectionCall for participation: This issue needs bisection: https://github.com/rust-lang/cargo-bisect-rustc
    E-needs-mcveCall for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example
    on Oct 10, 2026
  2. rustbot
    added
    needs-triageThis issue may need triage. Remove when done. See docs forge.rust-lang.org/release/issue-triaging
    I-prioritizeIssue needs a team member to assess the impact. Will be replaced by P-{low,medium,high,critical}
    on Oct 10, 2026
  3. theemathas
    added a parent issue on Oct 10, 2026

  4. theemathas commented on Oct 11, 2026

    @theemathas
    theemathas
    on Oct 11, 2026 · Hidden as off-topic
    Author

  5. theemathas commented on Oct 11, 2026

    @theemathas
    theemathas
    on Oct 11, 2026
    ContributorAuthor

    Notably, the rust_object_store regression only reproduces with cargo build, but not with cargo check

  6. theemathas commented on Oct 11, 2026

    @theemathas
    theemathas
    on Oct 11, 2026
    ContributorAuthor

    Bisection output with cargo bisect-rustc --start=1.99.0 --end=beta -- build:

    searched toolchains d453bdd8f092d099bc336f0bda4163f809ad18e0 through fd98695850065878fa7de48808dca4f0901cefbb


********************************************************************************
Regression in 2e2b193f8ada105f27608b7be81c293e0d7292cb
********************************************************************************

Attempting to search unrolled perf builds
ERROR: couldn't find perf build comment

    Regressed in #161789. Notably this is a cargo submodule update, but isn't the one which involved the build dir v2 change.

  7. theemathas
    added
    T-cargoRelevant to the cargo team, which will review and decide on the PR/issue.
    S-has-bisectionStatus: A bisection has been found for this issue
    I-cargo-nominatedNominated for discussion during a cargo team meeting.
    and removed
    E-needs-bisectionCall for participation: This issue needs bisection: https://github.com/rust-lang/cargo-bisect-rustc
    on Oct 11, 2026

  8. theemathas commented on Oct 11, 2026

    @theemathas
    theemathas
    on Oct 11, 2026
    ContributorAuthor

    Minimal reproducer: repro.zip

    This reproducer also reproduces the problem with cargo check. However, the original code needs cargo build to reproduce. I'm not sure why.

    I don't think crate-type = ["lib"] with proc-macro = true is supposed to be a legal combination.

    Cargo.toml

    [package]
name = "foo"
version = "0.1.0"
edition = "2021"

[lib]
crate-type = ["lib"]
proc-macro = true

[dependencies]
dep = { path = "./dep" }

    src/lib.rs

    use dep as _;

    src/main.rs

    use foo as _;

fn main() {}

    An empty library crate is at ./dep.

  9. 5 remaining items

  10. theemathas commented on Oct 11, 2026

    @theemathas
    theemathas
    on Oct 11, 2026
    ContributorAuthor

    Note: In the original code, this "proc macro" crate in the original code also exported non-proc-macro stuff

  11. weihanglo commented on Oct 11, 2026

    @weihanglo
    weihanglo
    on Oct 11, 2026
    Member

    Created a cargo side issue: rust-lang/cargo#17579

    This is indeed a separate regression.

  12. weihanglo
    added this to Cargo status trackeron Oct 13, 2026
  13. weihanglo
    moved this to Nominated in Cargo status trackeron Oct 13, 2026
  14. weihanglo
    added 2 commits that reference this issue on Oct 14, 2026

    fix: `-L` for searching deps if crate-type is proc macro explicitly

    e208394

    fix: check crate type when pruning `-L` paths

    8630b95
  15. ranger-ross
    closed this as completedin cargo#17589on Oct 14, 2026

  16. weihanglo commented on Oct 14, 2026

    @weihanglo
    weihanglo
    on Oct 14, 2026
    Member

    Beta backport PR on cargo side: rust-lang/cargo#17590

    Will create a backport PR in this repo shortly after that one get merged.

  17. Muscraft
    added a commit that references this issue on Oct 14, 2026

    fix: check crate type when pruning `-L` paths

    bb186ac

  18. weihanglo commented on Oct 14, 2026

    @weihanglo
    weihanglo
    on Oct 14, 2026
    Member

    #164324

  19. Muscraft
    added a commit that references this issue on Oct 14, 2026

    fix: check crate type when pruning `-L` paths (rust-lang#17589)

    01b026f
  20. rust-bors
    added 2 commits that reference this issue on Oct 15, 2026

    Auto merge of #164324 - weihanglo:cargo-1.100-beta-backport, r=weihanglo

    bdb37b8

    Auto merge of #164324 - weihanglo:cargo-1.100-beta-backport, r=weihanglo

    9787f58
  21. apiraino
    removed
    I-prioritizeIssue needs a team member to assess the impact. Will be replaced by P-{low,medium,high,critical}
    on Oct 15, 2026
  22. rust-bors
    added a commit that references this issue on Oct 17, 2026

    Auto merge of #164324 - weihanglo:cargo-1.100-beta-backport, r=weihanglo

    fd8e211
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    A-cratesArea: Crates and their interactions (like crate loading)A-proc-macrosArea: Procedural macrosC-bugCategory: This is a bug.I-cargo-nominatedNominated for discussion during a cargo team meeting.S-has-bisectionStatus: A bisection has been found for this issueS-has-mcveStatus: A Minimal Complete and Verifiable Example has been found for this issueT-cargoRelevant to the cargo team, which will review and decide on the PR/issue.regression-from-stable-to-betaPerformance or correctness regression from stable to beta.

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