[INFO] cloning repository https://github.com/mchesser/doc-host
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mchesser/doc-host" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmchesser%2Fdoc-host", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmchesser%2Fdoc-host'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 51029cd223c3aae848a0e866664d3edb3bde8978
[INFO] documenting mchesser/doc-host against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmchesser%2Fdoc-host" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mchesser/doc-host on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mchesser/doc-host
[INFO] finished tweaking git repo https://github.com/mchesser/doc-host
[INFO] tweaked toml for git repo https://github.com/mchesser/doc-host written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/mchesser/doc-host already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded notify v4.0.3
[INFO] [stderr]   Downloaded utf-8 v0.7.2
[INFO] [stderr]   Downloaded markup5ever v0.7.2
[INFO] [stderr]   Downloaded state v0.3.3
[INFO] [stderr]   Downloaded atty v0.2.8
[INFO] [stderr]   Downloaded ammonia v1.1.0
[INFO] [stderr]   Downloaded rustc-demangle v0.1.7
[INFO] [stderr]   Downloaded crossbeam v0.3.2
[INFO] [stderr]   Downloaded tendril v0.4.0
[INFO] [stderr]   Downloaded string_cache_codegen v0.4.0
[INFO] [stderr]   Downloaded futf v0.1.3
[INFO] [stderr]   Downloaded cmake v0.1.29
[INFO] [stderr]   Downloaded libssh2-sys v0.2.6
[INFO] [stderr]   Downloaded derive-error-chain v0.11.0
[INFO] [stderr]   Downloaded yansi v0.3.4
[INFO] [stderr]   Downloaded filetime v0.1.15
[INFO] [stderr]   Downloaded toml-query v0.6.0
[INFO] [stderr]   Downloaded mount v0.3.0
[INFO] [stderr]   Downloaded staticfile v0.4.0
[INFO] [stderr]   Downloaded env_logger v0.5.6
[INFO] [stderr]   Downloaded pest_derive v1.0.6
[INFO] [stderr]   Downloaded openssl-sys v0.9.27
[INFO] [stderr]   Downloaded string_cache v0.7.1
[INFO] [stderr]   Downloaded pear_codegen v0.0.12
[INFO] [stderr]   Downloaded rocket v0.3.6
[INFO] [stderr]   Downloaded handlebars v0.32.0
[INFO] [stderr]   Downloaded html5ever v0.22.0
[INFO] [stderr]   Downloaded libz-sys v1.0.18
[INFO] [stderr]   Downloaded is-match v0.1.0
[INFO] [stderr]   Downloaded rocket_contrib v0.3.6
[INFO] [stderr]   Downloaded chrono v0.4.1
[INFO] [stderr]   Downloaded open v1.2.1
[INFO] [stderr]   Downloaded sequence_trie v0.2.1
[INFO] [stderr]   Downloaded rocket_codegen v0.3.6
[INFO] [stderr]   Downloaded pear v0.0.12
[INFO] [stderr]   Downloaded git2 v0.7.1
[INFO] [stderr]   Downloaded curl-sys v0.4.1
[INFO] [stderr]   Downloaded libgit2-sys v0.7.1
[INFO] [stderr]   Downloaded elasticlunr-rs v1.0.0
[INFO] [stderr]   Downloaded mdbook v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", 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] 514f57251b713986d6aeecf3860282c0eae9c16a8a2830e4b9d49cf760af0e1d
[INFO] running `Command { std: "docker" "start" "-a" "514f57251b713986d6aeecf3860282c0eae9c16a8a2830e4b9d49cf760af0e1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "514f57251b713986d6aeecf3860282c0eae9c16a8a2830e4b9d49cf760af0e1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "514f57251b713986d6aeecf3860282c0eae9c16a8a2830e4b9d49cf760af0e1d", kill_on_drop: false }`
[INFO] [stdout] 514f57251b713986d6aeecf3860282c0eae9c16a8a2830e4b9d49cf760af0e1d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73a46e59751faf012a3d77d1c7c60b763a8ac8df918f3f9b9e2cdfd894257382
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "73a46e59751faf012a3d77d1c7c60b763a8ac8df918f3f9b9e2cdfd894257382", kill_on_drop: false }`
[INFO] [stderr]     Checking serde v1.0.36
[INFO] [stderr]    Compiling yansi v0.3.4
[INFO] [stderr]    Compiling regex v0.2.10
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]     Checking rustc-demangle v0.1.7
[INFO] [stderr]     Checking utf-8 v0.7.2
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking quick-error v1.2.1
[INFO] [stderr]     Checking sequence_trie v0.2.1
[INFO] [stderr]    Compiling httparse v1.2.4
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling pest v1.0.6
[INFO] [stderr]     Checking smallvec v0.4.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/yansi-0.3.4/src/lib.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature="nightly", feature(const_atomic_bool_new))]
[INFO] [stdout]   |                                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `const_atomic_bool_new`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/yansi-0.3.4/src/lib.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature="nightly", feature(const_atomic_bool_new))]
[INFO] [stdout]   |                                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking termcolor v0.3.6
[INFO] [stderr]     Checking pear v0.0.12
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `yansi` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "73a46e59751faf012a3d77d1c7c60b763a8ac8df918f3f9b9e2cdfd894257382", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73a46e59751faf012a3d77d1c7c60b763a8ac8df918f3f9b9e2cdfd894257382", kill_on_drop: false }`
[INFO] [stdout] 73a46e59751faf012a3d77d1c7c60b763a8ac8df918f3f9b9e2cdfd894257382