[INFO] cloning repository https://github.com/vi/audiorepeat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vi/audiorepeat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvi%2Faudiorepeat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvi%2Faudiorepeat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1563a7c673236223cdeb5259914f1e2a2329128e
[INFO] documenting vi/audiorepeat against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvi%2Faudiorepeat" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vi/audiorepeat on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vi/audiorepeat
[INFO] finished tweaking git repo https://github.com/vi/audiorepeat
[INFO] tweaked toml for git repo https://github.com/vi/audiorepeat written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/vi/audiorepeat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1daa96f4a8bd62a6e0a4cdf5f339e40ff55fff9a15b6342a057f032c6fab1074
[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" "1daa96f4a8bd62a6e0a4cdf5f339e40ff55fff9a15b6342a057f032c6fab1074", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1daa96f4a8bd62a6e0a4cdf5f339e40ff55fff9a15b6342a057f032c6fab1074", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1daa96f4a8bd62a6e0a4cdf5f339e40ff55fff9a15b6342a057f032c6fab1074", kill_on_drop: false }`
[INFO] [stdout] 1daa96f4a8bd62a6e0a4cdf5f339e40ff55fff9a15b6342a057f032c6fab1074
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", 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] 84e5084b07a86037712f0f2218b8e06b31585d95b309b70dce52a7b93ce516fc
[INFO] running `Command { std: "docker" "start" "-a" "84e5084b07a86037712f0f2218b8e06b31585d95b309b70dce52a7b93ce516fc", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling anyhow v1.0.28
[INFO] [stderr]    Compiling alsa-sys v0.3.0
[INFO] [stderr]     Checking nix v0.15.0
[INFO] [stderr]    Compiling argh_derive v0.1.1
[INFO] [stderr]     Checking alsa v0.4.2
[INFO] [stderr]     Checking argh v0.1.3
[INFO] [stderr]  Documenting audiorepeat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(saturating_neg)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `audiorepeat`
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name audiorepeat src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern alsa=/opt/rustwide/target/debug/deps/libalsa-d3809a698cc48208.rmeta --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-83dab8e3a6389f9c.rmeta --extern argh=/opt/rustwide/target/debug/deps/libargh-f2ae74729045a6c4.rmeta --extern crossbeam_channel=/opt/rustwide/target/debug/deps/libcrossbeam_channel-e34192b3e4a1b161.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "84e5084b07a86037712f0f2218b8e06b31585d95b309b70dce52a7b93ce516fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84e5084b07a86037712f0f2218b8e06b31585d95b309b70dce52a7b93ce516fc", kill_on_drop: false }`
[INFO] [stdout] 84e5084b07a86037712f0f2218b8e06b31585d95b309b70dce52a7b93ce516fc
