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regression: cannot find macro in scope #125201

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BoxyUwU opened this issue May 17, 2024 · 9 comments · Fixed by #125734
Open

regression: cannot find macro in scope #125201

BoxyUwU opened this issue May 17, 2024 · 9 comments · Fixed by #125734
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@petrochenkov
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A-resolve Area: Path resolution P-high High priority regression-from-stable-to-beta Performance or correctness regression from stable to beta. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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1.79.0

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@BoxyUwU
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BoxyUwU commented May 17, 2024 

[INFO] [stdout] error: cannot find macro `stringified_module_code` in this scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/safer-ffi-0.1.4/src/libc.rs:9:10
[INFO] [stdout]    |
[INFO] [stdout] 9  | #![doc = stringified_module_code!()]
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^^^^^ consider moving the definition of `stringified_module_code` before this call
[INFO] [stdout]    |
@BoxyUwU BoxyUwU added T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. regression-from-stable-to-beta Performance or correctness regression from stable to beta. labels May 17, 2024
@rustbot rustbot added I-prioritize Issue: Indicates that prioritization has been requested for this issue. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. labels May 17, 2024
@BoxyUwU BoxyUwU mentioned this issue May 17, 2024
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@BoxyUwU BoxyUwU added this to the 1.79.0 milestone May 17, 2024
@compiler-errors
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searched commit range: 4d570ee...aed2187
regressed commit: 35194e7

bisected with cargo-bisect-rustc v0.6.8

Host triple: x86_64-unknown-linux-gnu
Reproduce with:

cargo bisect-rustc --start=2024-04-01

Did this regress in #124382? cc @petrochenkov

@compiler-errors
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Specifically 7517a4f seems suspicious due to title alone, didn't look into it much though.

@dtolnay
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dtolnay commented May 17, 2024

This was reported by one of the affected crate authors in #124535.

@dtolnay dtolnay added the A-resolve Area: Path resolution label May 17, 2024
@saethlin saethlin removed the needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. label May 18, 2024
@apiraino
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WG-prioritization assigning priority (Zulip discussion).

Since these crates regressed, it could probably be good to keep this on the radar (release in 15 days)

@rustbot label -I-prioritize +P-high

@rustbot rustbot added P-high High priority and removed I-prioritize Issue: Indicates that prioritization has been requested for this issue. labels May 28, 2024
@petrochenkov
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I plan to fix it later this week (#124535 is assigned to me).

@petrochenkov petrochenkov self-assigned this May 28, 2024
@petrochenkov petrochenkov mentioned this issue May 29, 2024
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@petrochenkov
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Fixed in #125734.

@danielhenrymantilla
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danielhenrymantilla commented May 29, 2024 •
edited

Thanks @petrochenkov! FWIW, I've since submitted a new version of safer-ffi which does not rely in this AST ordering quirk: maybe that way in a few months this "breakage" can take place? I wouldn't want safer-ffi to embody the following xkcd:

xkcd: workflow (1172)

@petrochenkov
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@danielhenrymantilla
I plan to fix this properly in #125741 after the initial regression is addressed (maybe with a temporary deprecation lint), so fixing crates exploiting this bug still make sense.

fmease added a commit to fmease/rust that referenced this issue May 29, 2024
@fmease
Rollup merge of rust-lang#125734 - petrochenkov:macinattr, r=wesleywiser
ad8e162 
ast: Revert a breaking attribute visiting order change

Fixes rust-lang#124535
Fixes rust-lang#125201
@bors bors closed this as completed in fdfffc0 May 30, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this issue May 30, 2024
@rust-timer
Unrolled build for rust-lang#125734
b347e52 
Rollup merge of rust-lang#125734 - petrochenkov:macinattr, r=wesleywiser

ast: Revert a breaking attribute visiting order change

Fixes rust-lang#124535
Fixes rust-lang#125201
@lqd
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lqd commented May 30, 2024

Reopening to track beta backport

@lqd lqd reopened this May 30, 2024
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A-resolve Area: Path resolution P-high High priority regression-from-stable-to-beta Performance or correctness regression from stable to beta. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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ast: Revert a breaking attribute visiting order change petrochenkov/rust
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@lqd @dtolnay @compiler-errors @petrochenkov @apiraino @danielhenrymantilla @saethlin @BoxyUwU @rustbot