docs.rs failed to build axum 0.8.5 and axum-extra 0.10.2

[aleksanderkrauze]

If you go to see docs for latest version of axum (https://docs.rs/axum) or axum-extra (https://docs.rs/axum-extra), both of them were released yesterday, you will be greeted with message that docs.rs failed to build those crates.

Here are build logs for axum:

# rustc version
rustc 1.92.0-nightly (4082d6a3f 2025-09-27)# docs.rs version
docsrs 0.6.0 (f42173de 2025-09-12)# build log
[INFO] running `Command { std: "docker" "create" "-v" "/home/cratesfyi/workspace-builder/builds/axum-0.8.5/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace-builder/builds/axum-0.8.5/source:/opt/rustwide/workdir:ro,Z" "-v" "/home/cratesfyi/workspace-builder/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/home/cratesfyi/workspace-builder/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "DOCS_RS=1" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "6442450944" "--cpus" "6" "--user" "1001:1001" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "--all-features" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--emit=invocation-specific\", \"--resource-suffix\", \"-20250927-1.92.0-nightly-4082d6a3f\", \"--static-root-path\", \"/-/rustdoc.static/\", \"--cap-lints\", \"warn\", \"--extern-html-root-takes-precedence\"]" "--offline" "-Zunstable-options" "--config=doc.extern-map.registries.crates-io=\"https://docs.rs/{pkg_name}/{version}/x86_64-unknown-linux-gnu\"" "-Zrustdoc-scrape-examples" "-j6" "--target" "x86_64-unknown-linux-gnu", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 644fe61b7b310694c47ceeb434a3cc5b9a4003996ddff1faee14f930d6d49274
[INFO] running `Command { std: "docker" "start" "-a" "644fe61b7b310694c47ceeb434a3cc5b9a4003996ddff1faee14f930d6d49274", kill_on_drop: false }`
[INFO] [stderr] warning: target filter specified, but no targets matched; this is a no-op
[INFO] [stderr]  Documenting axum v0.8.5 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]    --> src/lib.rs:430:29
[INFO] [stderr]     |
[INFO] [stderr] 430 | #![cfg_attr(docsrs, feature(doc_auto_cfg, doc_cfg))]
[INFO] [stderr]     |                             ^^^^^^^^^^^^ feature has been removed
[INFO] [stderr]     |
[INFO] [stderr]     = note: removed in 1.58.0; see <https://github.com/rust-lang/rust/pull/138907> for more information
[INFO] [stderr]     = note: merged into `doc_cfg`
[INFO] [stderr] 
[INFO] [stderr] error: Compilation failed, aborting rustdoc
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0557`.
[INFO] [stderr] error: could not document `axum`
[INFO] running `Command { std: "docker" "inspect" "644fe61b7b310694c47ceeb434a3cc5b9a4003996ddff1faee14f930d6d49274", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "644fe61b7b310694c47ceeb434a3cc5b9a4003996ddff1faee14f930d6d49274", kill_on_drop: false }`
[INFO] [stdout] 644fe61b7b310694c47ceeb434a3cc5b9a4003996ddff1faee14f930d6d49274

and for axum-extra:

# rustc version
rustc 1.92.0-nightly (4082d6a3f 2025-09-27)# docs.rs version
docsrs 0.6.0 (f42173de 2025-09-12)# build log
[INFO] running `Command { std: "docker" "create" "-v" "/home/cratesfyi/workspace/builds/axum-extra-0.10.2/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/axum-extra-0.10.2/source:/opt/rustwide/workdir:ro,Z" "-v" "/home/cratesfyi/workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/home/cratesfyi/workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "DOCS_RS=1" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "6442450944" "--cpus" "6" "--user" "1001:1001" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "--all-features" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--emit=invocation-specific\", \"--resource-suffix\", \"-20250927-1.92.0-nightly-4082d6a3f\", \"--static-root-path\", \"/-/rustdoc.static/\", \"--cap-lints\", \"warn\", \"--extern-html-root-takes-precedence\"]" "--offline" "-Zunstable-options" "--config=doc.extern-map.registries.crates-io=\"https://docs.rs/{pkg_name}/{version}/x86_64-unknown-linux-gnu\"" "-Zrustdoc-scrape-examples" "-j6" "--target" "x86_64-unknown-linux-gnu", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4050dca66b4cf14e453f326ae7dc0f5eb9a7bec27ebccbd3198808a12ec24cab
[INFO] running `Command { std: "docker" "start" "-a" "4050dca66b4cf14e453f326ae7dc0f5eb9a7bec27ebccbd3198808a12ec24cab", kill_on_drop: false }`
[INFO] [stderr] warning: target filter specified, but no targets matched; this is a no-op
[INFO] [stderr]  Documenting axum-extra v0.10.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]   --> src/lib.rs:33:38
[INFO] [stderr]    |
[INFO] [stderr] 33 | #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
[INFO] [stderr]    |                                      ^^^^^^^^^^^^ feature has been removed
[INFO] [stderr]    |
[INFO] [stderr]    = note: removed in 1.58.0; see <https://github.com/rust-lang/rust/pull/138907> for more information
[INFO] [stderr]    = note: merged into `doc_cfg`
[INFO] [stderr] 
[INFO] [stderr] error: Compilation failed, aborting rustdoc
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0557`.
[INFO] [stderr] error: could not document `axum-extra`
[INFO] running `Command { std: "docker" "inspect" "4050dca66b4cf14e453f326ae7dc0f5eb9a7bec27ebccbd3198808a12ec24cab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4050dca66b4cf14e453f326ae7dc0f5eb9a7bec27ebccbd3198808a12ec24cab", kill_on_drop: false }`
[INFO] [stdout] 4050dca66b4cf14e453f326ae7dc0f5eb9a7bec27ebccbd3198808a12ec24cab