[INFO] cloning repository https://github.com/ryanjackgit/distributedlock
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ryanjackgit/distributedlock" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fryanjackgit%2Fdistributedlock", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fryanjackgit%2Fdistributedlock'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a024f4b362bbb31c3f87d6debf2b7d267749485
[INFO] documenting ryanjackgit/distributedlock against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fryanjackgit%2Fdistributedlock" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ryanjackgit/distributedlock on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ryanjackgit/distributedlock
[INFO] finished tweaking git repo https://github.com/ryanjackgit/distributedlock
[INFO] tweaked toml for git repo https://github.com/ryanjackgit/distributedlock written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/ryanjackgit/distributedlock already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2022-05-20" "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] 9ec5ead1b4430389ecc9426f55a39e97972e10a9b4f2778cada36fb55aa5b69d
[INFO] running `Command { std: "docker" "start" "-a" "9ec5ead1b4430389ecc9426f55a39e97972e10a9b4f2778cada36fb55aa5b69d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ec5ead1b4430389ecc9426f55a39e97972e10a9b4f2778cada36fb55aa5b69d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ec5ead1b4430389ecc9426f55a39e97972e10a9b4f2778cada36fb55aa5b69d", kill_on_drop: false }`
[INFO] [stdout] 9ec5ead1b4430389ecc9426f55a39e97972e10a9b4f2778cada36fb55aa5b69d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 214ba816831c57980de02e0bb31ce36931cf90dd9633f9db331404c051ccc0f5
[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" "214ba816831c57980de02e0bb31ce36931cf90dd9633f9db331404c051ccc0f5", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]    Compiling async-trait v0.1.53
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking snowflake v1.3.0
[INFO] [stderr]     Checking tracing-core v0.1.23
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]     Checking lock_api v0.4.6
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking log v0.4.16
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]     Checking parking_lot_core v0.9.1
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]     Checking mio v0.8.2
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking futures-channel v0.3.21
[INFO] [stderr]     Checking parking_lot v0.12.0
[INFO] [stderr]     Checking tracing-log v0.1.2
[INFO] [stderr]    Compiling quote v1.0.17
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling tracing-attributes v0.1.20
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]     Checking tokio v1.17.0
[INFO] [stderr]     Checking tracing v0.1.32
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling proc-macro-crate v1.1.3
[INFO] [stderr]     Checking tracing-subscriber v0.3.9
[INFO] [stderr]    Compiling num_enum_derive v0.5.7
[INFO] [stderr]     Checking futures-executor v0.3.21
[INFO] [stderr]     Checking futures v0.3.21
[INFO] [stderr]     Checking num_enum v0.5.7
[INFO] [stderr]     Checking zookeeper-async v4.1.0
[INFO] [stderr]  Documenting distributelock v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(map_first_last)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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 document `distributelock`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type bin --crate-name distributelock src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=2df281fa2f677e91 -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-f1182eb1ea07fabc.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-d320de7f228ffae8.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-1c831d878bab7e94.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-65d603f77a53ad89.rmeta --extern tracing_subscriber=/opt/rustwide/target/debug/deps/libtracing_subscriber-f9f6c5139f281037.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-555984935aa862db.rmeta --extern zookeeper_async=/opt/rustwide/target/debug/deps/libzookeeper_async-c432bf6fd3f463ad.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "214ba816831c57980de02e0bb31ce36931cf90dd9633f9db331404c051ccc0f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "214ba816831c57980de02e0bb31ce36931cf90dd9633f9db331404c051ccc0f5", kill_on_drop: false }`
[INFO] [stdout] 214ba816831c57980de02e0bb31ce36931cf90dd9633f9db331404c051ccc0f5