1.94 beta regression: "malformed doc attribute input" #151865
Description
The following errors are all the errors found in the 1.94 beta crater run that are related to the doc attribute.
Error 1
[INFO] [stdout] error[E0538]: malformed `doc` attribute input
[INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-stream-0.1.2/src/lib.rs:20:1
[INFO] [stdout] |
[INFO] [stdout] 20 | / #![doc(test(
[INFO] [stdout] 21 | | no_crate_inject,
[INFO] [stdout] | | --------------- found `no_crate_inject` used as a key more than once
[INFO] [stdout] 22 | | attr(deny(warnings, rust_2018_idioms), allow(dead_code, unused_variables))
[INFO] [stdout] 23 | | ))]
[INFO] [stdout] | |___^
The above error comes from 125 crates that depend on tokio-stream verions 0.1.0-0.1.3, such as:
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/3andero.async-redis/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/Dumbeldor.dumbbot/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/AEnterprise.Trovo/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/InterestingBrainPoops.apep/log.txt
- Many others
Error 2
[INFO] [stdout] error[E0539]: malformed `doc` attribute input
[INFO] [stdout] --> tests/tagname.rs:60:5
[INFO] [stdout] |
[INFO] [stdout] 60 | #[doc("other attribute")]
[INFO] [stdout] | ^^^^^^-----------------^^
[INFO] [stdout] | |
[INFO] [stdout] | expected this to be of the form `... = "..."`
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/alexrenda.alacritty/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/bobtwinkles.msdfgen-rs/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/sammosampson.rust-msdfgen/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/assemble-freight-0.2.0/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/assemble-std-0.2.0/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/tagname-0.3.1/log.txt
Error 3
[INFO] [stdout] error[E0539]: malformed `doc` attribute input
[INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/horrorshow-0.8.3/src/helper.rs:5:9
[INFO] [stdout] |
[INFO] [stdout] 5 | #[doc($doc)]
[INFO] [stdout] | ^^^^^^----^^
[INFO] [stdout] | |
[INFO] [stdout] | expected this to be of the form `... = "..."`
[INFO] [stdout] ...
[INFO] [stdout] 13 | c!("The standard HTML5 doctype (this *is* the doctype you're looking for)." => HTML "<!DOCTYPE html>");
[INFO] [stdout] | ------------------------------------------------------------------------------------------------------ in this macro invocation
[INFO] [stdout] |
[INFO] [stdout] = note: this error originates in the macro `c` (in Nightly builds, run with -Z macro-backtrace for more info)
Dependendents of horrorshow versions 0.6.6, 0.7.0, and 0.8.3
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/X-m7.csv_to_gv_aon/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/fontfinder-1.5.0/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/siquery-1.2.5/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/siquery_cli-1.2.5/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/transitive_frontier-0.1.1/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/dpc.tagwiki/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/jaredwindover.static_site_generator/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/ogham.specsheet/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/wgr523.blockchain-simulator/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/const-tweaker-0.3.1/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/rocket-game-0.1.6/log.txt
Error 4
[INFO] [stdout] error[E0539]: malformed `doc` attribute input
[INFO] [stdout] --> src/agda/repl.rs:118:13
[INFO] [stdout] |
[INFO] [stdout] 118 | #[doc($d)]
[INFO] [stdout] | ^^^^^^--^^
[INFO] [stdout] | |
[INFO] [stdout] | expected this to be of the form `... = "..."`
[INFO] [stdout] ...
[INFO] [stdout] 134 | next_resp_of!(next_give_action, GiveAction, "Skip until next give-action.");
[INFO] [stdout] | --------------------------------------------------------------------------- in this macro invocation
[INFO] [stdout] |
[INFO] [stdout] = note: this error originates in the macro `next_resp_of` (in Nightly builds, run with -Z macro-backtrace for more info)
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/agda-mode-0.1.8/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/agda-tac-0.1.5/log.txt
Error 5
[INFO] [stdout] error[E0565]: malformed `doc` attribute input
[INFO] [stdout] --> sdk/src/protocol/incoming.rs:85:5
[INFO] [stdout] |
[INFO] [stdout] 85 | #[doc(hidden = "handled transparently by codegen")]
[INFO] [stdout] | ^^^^^^^^^^^^^------------------------------------^^
[INFO] [stdout] | |
[INFO] [stdout] | didn't expect any arguments here
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/jonhoo.touchportal-plugin/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/gh/skochev84.sguaba-celestial/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/dco3-0.18.0/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/sguaba-0.9.11/log.txt
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/touchportal-sdk-0.0.1/log.txt
Error 6
[INFO] [stdout] error[E0565]: malformed `doc` attribute input
[INFO] [stdout] --> src/lib.rs:31:1
[INFO] [stdout] |
[INFO] [stdout] 31 | #[doc(hidden("or you will be fired"))]
[INFO] [stdout] | ^^^^^^^^^^^^------------------------^^
[INFO] [stdout] | |
[INFO] [stdout] | didn't expect any arguments here
Error 7
[INFO] [stdout] error[E0565]: malformed `doc` attribute input
[INFO] [stdout] --> src/lib.rs:180:1
[INFO] [stdout] |
[INFO] [stdout] 180 | #[doc(hidden = true)]
[INFO] [stdout] | ^^^^^^^^^^^^^------^^
[INFO] [stdout] | |
[INFO] [stdout] | didn't expect any arguments here
- https://crater-reports.s3.amazonaws.com/beta-1.94-2/beta-2026-01-20/reg/g11-macro-keys-0.3.0/log.txt
Error 8
[INFO] [stdout] error[E0538]: malformed `doc` attribute input
[INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rgeometry-0.10.0/src/lib.rs:6:1
[INFO] [stdout] |
[INFO] [stdout] 6 | #![doc(test(no_crate_inject))]
[INFO] [stdout] | ^^^^^^^^^^^^---------------^^^
[INFO] [stdout] | |
[INFO] [stdout] | found `no_crate_inject` used as a key more than once
Error 9
(Huge wall of error text omitted)