[INFO] cloning repository https://github.com/steveklabnik/doxidize
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/steveklabnik/doxidize" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveklabnik%2Fdoxidize", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveklabnik%2Fdoxidize'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c0cd9fce983a16187cdf54b6489cf86bfe8b21c9
[INFO] documenting steveklabnik/doxidize against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveklabnik%2Fdoxidize" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/steveklabnik/doxidize on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/steveklabnik/doxidize
[INFO] finished tweaking git repo https://github.com/steveklabnik/doxidize
[INFO] tweaked toml for git repo https://github.com/steveklabnik/doxidize written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/steveklabnik/doxidize already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/steveklabnik/simple-server`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded structopt-derive v0.1.6
[INFO] [stderr]   Downloaded walkdir v2.1.4
[INFO] [stderr]   Downloaded num-traits v0.1.42
[INFO] [stderr]   Downloaded ctrlc v3.1.0
[INFO] [stderr]   Downloaded rustc-demangle v0.1.5
[INFO] [stderr]   Downloaded slab v0.1.3
[INFO] [stderr]   Downloaded nix v0.5.1
[INFO] [stderr]   Downloaded typed-arena v1.3.0
[INFO] [stderr]   Downloaded miow v0.1.5
[INFO] [stderr]   Downloaded inotify v0.3.0
[INFO] [stderr]   Downloaded heck v0.3.0
[INFO] [stderr]   Downloaded radix_trie v0.1.2
[INFO] [stderr]   Downloaded unidecode v0.3.0
[INFO] [stderr]   Downloaded filetime v0.1.15
[INFO] [stderr]   Downloaded slog v2.2.3
[INFO] [stderr]   Downloaded slog-term v2.3.0
[INFO] [stderr]   Downloaded structopt v0.1.7
[INFO] [stderr]   Downloaded cc v1.0.4
[INFO] [stderr]   Downloaded slugify v0.1.0
[INFO] [stderr]   Downloaded pest_derive v1.0.7
[INFO] [stderr]   Downloaded ascii v0.7.1
[INFO] [stderr]   Downloaded num v0.1.41
[INFO] [stderr]   Downloaded clap v2.29.4
[INFO] [stderr]   Downloaded serde v1.0.27
[INFO] [stderr]   Downloaded http v0.1.4
[INFO] [stderr]   Downloaded failure_derive v0.1.1
[INFO] [stderr]   Downloaded synstructure v0.6.1
[INFO] [stderr]   Downloaded derive-new v0.5.0
[INFO] [stderr]   Downloaded erased-serde v0.3.3
[INFO] [stderr]   Downloaded handlebars v0.32.0
[INFO] [stderr]   Downloaded twoway v0.1.7
[INFO] [stderr]   Downloaded bitflags v0.4.0
[INFO] [stderr]   Downloaded serde_derive v1.0.27
[INFO] [stderr]   Downloaded failure v0.1.1
[INFO] [stderr]   Downloaded unicode-segmentation v1.2.0
[INFO] [stderr]   Downloaded backtrace-sys v0.1.16
[INFO] [stderr]   Downloaded serde_json v1.0.9
[INFO] [stderr]   Downloaded endian-type v0.1.2
[INFO] [stderr]   Downloaded take_mut v0.2.0
[INFO] [stderr]   Downloaded serde_derive_internals v0.19.0
[INFO] [stderr]   Downloaded nibble_vec v0.0.3
[INFO] [stderr]   Downloaded atty v0.2.6
[INFO] [stderr]   Downloaded configure v0.1.1
[INFO] [stderr]   Downloaded isatty v0.1.6
[INFO] [stderr]   Downloaded pest v1.0.3
[INFO] [stderr]   Downloaded same-file v1.0.2
[INFO] [stderr]   Downloaded bytes v0.3.0
[INFO] [stderr]   Downloaded mio v0.5.1
[INFO] [stderr]   Downloaded regex-syntax v0.4.2
[INFO] [stderr]   Downloaded notify v4.0.3
[INFO] [stderr]   Downloaded regex v0.2.5
[INFO] [stderr]   Downloaded backtrace v0.3.5
[INFO] [stderr]   Downloaded rls-span v0.4.0
[INFO] [stderr]   Downloaded toml_edit v0.1.1
[INFO] [stderr]   Downloaded entities v1.0.0
[INFO] [stderr]   Downloaded configure_derive v0.1.1
[INFO] [stderr]   Downloaded rls-data v0.15.0
[INFO] [stderr]   Downloaded combine v3.0.0-alpha.2
[INFO] [stderr]   Downloaded comrak v0.2.8
[INFO] [stderr]   Downloaded rls-analysis v0.11.3
[INFO] [stderr]   Downloaded nix v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc44f078dfb1ea3027dd0fa157add719a02fc6760415c95ca8774db582965a6c
[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" "cc44f078dfb1ea3027dd0fa157add719a02fc6760415c95ca8774db582965a6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc44f078dfb1ea3027dd0fa157add719a02fc6760415c95ca8774db582965a6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc44f078dfb1ea3027dd0fa157add719a02fc6760415c95ca8774db582965a6c", kill_on_drop: false }`
[INFO] [stdout] cc44f078dfb1ea3027dd0fa157add719a02fc6760415c95ca8774db582965a6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cdfe5e28d78dd90b474bf2b5f4df741f8d72301149d6fb93afd25ec12f0f70ab
[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" "cdfe5e28d78dd90b474bf2b5f4df741f8d72301149d6fb93afd25ec12f0f70ab", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.1.42
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]    Compiling cc v1.0.4
[INFO] [stderr]    Compiling pest v1.0.3
[INFO] [stderr]    Compiling unicode-segmentation v1.2.0
[INFO] [stderr]     Checking ansi_term v0.10.2
[INFO] [stderr]     Checking regex-syntax v0.4.2
[INFO] [stderr]     Checking rustc-demangle v0.1.5
[INFO] [stderr]     Checking slab v0.1.3
[INFO] [stderr]     Checking slog v2.2.3
[INFO] [stderr]     Checking same-file v1.0.2
[INFO] [stderr]     Checking ascii v0.7.1
[INFO] [stderr]     Checking nibble_vec v0.0.3
[INFO] [stderr]     Checking bytes v0.3.0
[INFO] [stderr]     Checking endian-type v0.1.2
[INFO] [stderr]     Checking unidecode v0.3.0
[INFO] [stderr]     Checking entities v1.0.0
[INFO] [stderr]     Checking take_mut v0.2.0
[INFO] [stderr]     Checking unicode_categories v0.1.1
[INFO] [stderr]     Checking typed-arena v1.3.0
[INFO] [stderr]     Checking scoped_threadpool v0.1.8
[INFO] [stderr]     Checking remove_dir_all v0.5.0
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking atty v0.2.6
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking isatty v0.1.6
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking inotify v0.3.0
[INFO] [stderr]     Checking net2 v0.2.31
[INFO] [stderr]     Checking filetime v0.1.15
[INFO] [stderr]     Checking erased-serde v0.3.3
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]     Checking rls-span v0.4.0
[INFO] [stderr]     Checking nix v0.9.0
[INFO] [stderr]     Checking walkdir v2.1.4
[INFO] [stderr]     Checking combine v3.0.0-alpha.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rls-span-0.4.0/src/lib.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![feature(proc_macro)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]     Checking serde_json v1.0.9
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rls-span`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "cdfe5e28d78dd90b474bf2b5f4df741f8d72301149d6fb93afd25ec12f0f70ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdfe5e28d78dd90b474bf2b5f4df741f8d72301149d6fb93afd25ec12f0f70ab", kill_on_drop: false }`
[INFO] [stdout] cdfe5e28d78dd90b474bf2b5f4df741f8d72301149d6fb93afd25ec12f0f70ab