[INFO] cloning repository https://github.com/Lolirofle/simple_keyboard_instrument
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Lolirofle/simple_keyboard_instrument" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLolirofle%2Fsimple_keyboard_instrument", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLolirofle%2Fsimple_keyboard_instrument'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 780dbcc320985eb776e39f469b3e36336bdd6790
[INFO] documenting Lolirofle/simple_keyboard_instrument against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLolirofle%2Fsimple_keyboard_instrument" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Lolirofle/simple_keyboard_instrument on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Lolirofle/simple_keyboard_instrument
[INFO] finished tweaking git repo https://github.com/Lolirofle/simple_keyboard_instrument
[INFO] tweaked toml for git repo https://github.com/Lolirofle/simple_keyboard_instrument written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/Lolirofle/simple_keyboard_instrument already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2d0a6f737dc0d8e0c41f5d8eb066fab2f92c6435a22e04fb0c90a0bbad088886
[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" "2d0a6f737dc0d8e0c41f5d8eb066fab2f92c6435a22e04fb0c90a0bbad088886", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2d0a6f737dc0d8e0c41f5d8eb066fab2f92c6435a22e04fb0c90a0bbad088886", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d0a6f737dc0d8e0c41f5d8eb066fab2f92c6435a22e04fb0c90a0bbad088886", kill_on_drop: false }`
[INFO] [stdout] 2d0a6f737dc0d8e0c41f5d8eb066fab2f92c6435a22e04fb0c90a0bbad088886
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e372bd795e914ff6bf57b50993f2936eef3fee6c80ab8fb34361a58897e33750
[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" "e372bd795e914ff6bf57b50993f2936eef3fee6c80ab8fb34361a58897e33750", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_jitter v0.1.0
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]     Checking rand_os v0.1.1
[INFO] [stderr]     Checking stb_truetype v0.2.5
[INFO] [stderr]     Checking rand_pcg v0.1.1
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking rusttype v0.7.3
[INFO] [stderr]     Checking cpal v0.8.2
[INFO] [stderr]     Checking andrew v0.1.6
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.4
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking winit v0.18.1
[INFO] [stderr]  Documenting keyboard_piano 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(type_ascription)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `keyboard_piano`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name keyboard_piano 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 cpal=/opt/rustwide/target/debug/deps/libcpal-c3c2a7b6d62f69de.rmeta --extern winit=/opt/rustwide/target/debug/deps/libwinit-b59bb4e9742e03da.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "e372bd795e914ff6bf57b50993f2936eef3fee6c80ab8fb34361a58897e33750", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e372bd795e914ff6bf57b50993f2936eef3fee6c80ab8fb34361a58897e33750", kill_on_drop: false }`
[INFO] [stdout] e372bd795e914ff6bf57b50993f2936eef3fee6c80ab8fb34361a58897e33750
