[INFO] cloning repository https://github.com/shelmesky/rust_kernel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shelmesky/rust_kernel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshelmesky%2Frust_kernel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshelmesky%2Frust_kernel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 47be8e66c79927ba21247c7a7b090651b5459e80
[INFO] documenting shelmesky/rust_kernel against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshelmesky%2Frust_kernel" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shelmesky/rust_kernel on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shelmesky/rust_kernel
[INFO] finished tweaking git repo https://github.com/shelmesky/rust_kernel
[INFO] tweaked toml for git repo https://github.com/shelmesky/rust_kernel written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/shelmesky/rust_kernel already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8f0c6cc12972b138bc480852c972afa70818db7633cda6d33bd66ed75c2efe4b
[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" "8f0c6cc12972b138bc480852c972afa70818db7633cda6d33bd66ed75c2efe4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f0c6cc12972b138bc480852c972afa70818db7633cda6d33bd66ed75c2efe4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f0c6cc12972b138bc480852c972afa70818db7633cda6d33bd66ed75c2efe4b", kill_on_drop: false }`
[INFO] [stdout] 8f0c6cc12972b138bc480852c972afa70818db7633cda6d33bd66ed75c2efe4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+beta-2021-08-01" "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] 4f23b289c6d568f7987534262f552953dd0ee025e97bb6abd5795c460c88e994
[INFO] running `Command { std: "docker" "start" "-a" "4f23b289c6d568f7987534262f552953dd0ee025e97bb6abd5795c460c88e994", kill_on_drop: false }`
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling llvm-tools v0.1.1
[INFO] [stderr]     Checking zero v0.1.2
[INFO] [stderr]     Checking cast v0.2.2
[INFO] [stderr]     Checking ux v0.1.3
[INFO] [stderr]     Checking usize_conversions v0.2.0
[INFO] [stderr]     Checking fixedvec v0.2.4
[INFO] [stderr]     Checking xmas-elf v0.6.2
[INFO] [stderr]     Checking array-init v0.0.4
[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/usize_conversions-0.2.0/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(i128_type)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `i128_type` has been stable since 1.26.0 and no longer requires an attribute to enable
[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 compile `usize_conversions` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "4f23b289c6d568f7987534262f552953dd0ee025e97bb6abd5795c460c88e994", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f23b289c6d568f7987534262f552953dd0ee025e97bb6abd5795c460c88e994", kill_on_drop: false }`
[INFO] [stdout] 4f23b289c6d568f7987534262f552953dd0ee025e97bb6abd5795c460c88e994
