[INFO] cloning repository https://github.com/mdrokz/rounds_mod_downloader
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mdrokz/rounds_mod_downloader" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdrokz%2Frounds_mod_downloader", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdrokz%2Frounds_mod_downloader'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 908bccd4ff8e6860d670689ac961e41d3e1b52cc
[INFO] documenting mdrokz/rounds_mod_downloader 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%2Fmdrokz%2Frounds_mod_downloader" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mdrokz/rounds_mod_downloader 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/mdrokz/rounds_mod_downloader
[INFO] finished tweaking git repo https://github.com/mdrokz/rounds_mod_downloader
[INFO] tweaked toml for git repo https://github.com/mdrokz/rounds_mod_downloader written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/mdrokz/rounds_mod_downloader 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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stdout] 6d94bb4591566a71f473ffe7f6222a8792ce0cd8b6ed2cdebc9f1b3c537f2110
[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" "6d94bb4591566a71f473ffe7f6222a8792ce0cd8b6ed2cdebc9f1b3c537f2110", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d94bb4591566a71f473ffe7f6222a8792ce0cd8b6ed2cdebc9f1b3c537f2110", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d94bb4591566a71f473ffe7f6222a8792ce0cd8b6ed2cdebc9f1b3c537f2110", kill_on_drop: false }`
[INFO] [stdout] 6d94bb4591566a71f473ffe7f6222a8792ce0cd8b6ed2cdebc9f1b3c537f2110
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] c23b6dbcb71ed8a2758160fc1a195b0453c82fd791cc18f705304fbe34b060a8
[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" "c23b6dbcb71ed8a2758160fc1a195b0453c82fd791cc18f705304fbe34b060a8", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.93
[INFO] [stderr]    Compiling zstd-safe v4.1.6+zstd.1.5.2
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking base64ct v1.0.1
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]     Checking flate2 v1.0.23
[INFO] [stderr]     Checking time v0.3.9
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking cipher v0.3.0
[INFO] [stderr]     Checking dirs v4.0.0
[INFO] [stderr]     Checking indexmap v1.8.1
[INFO] [stderr]    Compiling openssl-sys v0.9.73
[INFO] [stderr]     Checking digest v0.10.3
[INFO] [stderr]    Compiling bzip2-sys v0.1.11+1.0.8
[INFO] [stderr]     Checking resolve-path v0.1.0
[INFO] [stderr]     Checking aes v0.7.5
[INFO] [stderr]     Checking password-hash v0.3.2
[INFO] [stderr]     Checking sha2 v0.10.2
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking sha1 v0.10.1
[INFO] [stderr]     Checking zstd v0.10.2+zstd.1.5.2
[INFO] [stderr]     Checking pbkdf2 v0.10.1
[INFO] [stderr]     Checking bzip2 v0.4.3
[INFO] [stderr]    Compiling openssl v0.10.40
[INFO] [stderr]    Compiling native-tls v0.2.10
[INFO] [stderr]     Checking zip v0.6.2
[INFO] [stderr]     Checking unzip v1.0.1 (https://github.com/mdrokz/unzip-rs#13e0977d)
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling openssl-macros v0.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling clap_derive v3.1.18
[INFO] [stderr]     Checking clap v3.1.18
[INFO] [stderr]     Checking serde v1.0.137
[INFO] [stderr]     Checking attohttpc v0.19.1
[INFO] [stderr]     Checking serde_json v1.0.81
[INFO] [stderr]  Documenting rounds_mod_downloader 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[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 `rounds_mod_downloader`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type bin --crate-name rounds_mod_downloader 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=295a0f9ca2178ab8 -L dependency=/opt/rustwide/target/debug/deps --extern attohttpc=/opt/rustwide/target/debug/deps/libattohttpc-888823a10d21be0d.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-af3adc296887843d.rmeta --extern resolve_path=/opt/rustwide/target/debug/deps/libresolve_path-1249846bccc78037.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-4ba2fb46801a6f76.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-cdb42238d2cd98eb.rmeta --extern unzip=/opt/rustwide/target/debug/deps/libunzip-2accac8dabee9d1e.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c23b6dbcb71ed8a2758160fc1a195b0453c82fd791cc18f705304fbe34b060a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c23b6dbcb71ed8a2758160fc1a195b0453c82fd791cc18f705304fbe34b060a8", kill_on_drop: false }`
[INFO] [stdout] c23b6dbcb71ed8a2758160fc1a195b0453c82fd791cc18f705304fbe34b060a8