no docs.rs build for kube 0.68

[clux]

via https://docs.rs/crate/kube/0.68.0/builds/502631
extern-html-root-url seems to be the problem, but afaikt we don't set this (rg extern turns up nothing useful)

# rustc version
rustc 1.60.0-nightly (498eeb72f 2022-01-31)
# docs.rs version
docsrs 0.6.0 (142844e 2022-01-23)

# build log
[INFO] running `Command { std: "docker" "create" "-v" "/home/cratesfyi/workspace/builds/kube-0.68.0/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/kube-0.68.0/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" "3221225472" "--cpus" "3" "--user" "1001:1001" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "--features" "client native-tls rustls-tls openssl-tls derive ws oauth jsonpatch admission runtime k8s-openapi/v1_22" "-Z" "unstable-options" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--emit=invocation-specific\", \"--resource-suffix\", \"-20220131-1.60.0-nightly-498eeb72f\", \"--static-root-path\", \"/\", \"--cap-lints\", \"warn\", \"--disable-per-crate-search\"]" "-Zunstable-options" "--config=doc.extern-map.registries.crates-io=\"https://docs.rs/{pkg_name}/{version}/x86_64-unknown-linux-gnu\"" "-j3" "--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] 57c5112f1911e4e6e47e2fb9669de2db8005cc1990ea965c7030d3e6445b4004
[INFO] running `Command { std: "docker" "start" "-a" "57c5112f1911e4e6e47e2fb9669de2db8005cc1990ea965c7030d3e6445b4004", kill_on_drop: false }`
[INFO] [stderr]  Documenting kube v0.68.0 (/opt/rustwide/workdir)
[INFO] [stderr] thread 'rustc' panicked at 'no entry found for key', src/librustdoc/passes/collect_intra_doc_links.rs:930:16
[INFO] [stderr] note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
[INFO] [stderr] 
[INFO] [stderr] error: internal compiler error: unexpected panic
[INFO] [stderr] 
[INFO] [stderr] error: Unrecognized option: 'extern-html-root-url'
[INFO] [stderr] 
[INFO] [stderr] error: could not document `kube`

[clux]

builds locally without warnings :(

[clux]

possibly related: rust-lang/docs.rs#1165

[kazk]

Looks like we are not the only ones with this failure, recent failures:

• https://docs.rs/crate/consalifold/0.1.8/builds/502606
• https://docs.rs/crate/menmos/0.2.3/builds/502566
• https://docs.rs/crate/reef/0.1.12/builds/502526
• https://docs.rs/crate/deno_runtime/0.43.0/builds/500359

[kazk]

Probably rust-lang/docs.rs#1632 (rust-lang/rust#93476).

[clux]

kube build has been fixed now, thanks to upstream re-triggering it.