[INFO] cloning repository https://github.com/LucioFranco/assets-benchmark
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LucioFranco/assets-benchmark" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLucioFranco%2Fassets-benchmark", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLucioFranco%2Fassets-benchmark'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8262c1864a0bef122cd555f9cde8b6128f93b91f
[INFO] testing LucioFranco/assets-benchmark against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLucioFranco%2Fassets-benchmark" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LucioFranco/assets-benchmark on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LucioFranco/assets-benchmark
[INFO] finished tweaking git repo https://github.com/LucioFranco/assets-benchmark
[INFO] tweaked toml for git repo https://github.com/LucioFranco/assets-benchmark written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/LucioFranco/assets-benchmark already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded criterion-plot v0.2.5
[INFO] [stderr]   Downloaded criterion-stats v0.2.5
[INFO] [stderr]   Downloaded serde_derive v1.0.81
[INFO] [stderr]   Downloaded criterion v0.2.5
[INFO] [stderr]   Downloaded speedometer v0.2.2
[INFO] [stderr]   Downloaded crossbeam-utils v0.6.2
[INFO] [stderr]   Downloaded handlebars v0.32.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 920f89c58c83944a662ad269c297ce681ecea13bf448132bda303a76b6585891
[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" "920f89c58c83944a662ad269c297ce681ecea13bf448132bda303a76b6585891", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "920f89c58c83944a662ad269c297ce681ecea13bf448132bda303a76b6585891", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "920f89c58c83944a662ad269c297ce681ecea13bf448132bda303a76b6585891", kill_on_drop: false }`
[INFO] [stdout] 920f89c58c83944a662ad269c297ce681ecea13bf448132bda303a76b6585891
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "RUSTFLAGS=--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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--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] 4d6853d92847bb32f5309441b4d9c272cc8b79e8dd419da22b3e7fbd561a7051
[INFO] running `Command { std: "docker" "start" "-a" "4d6853d92847bb32f5309441b4d9c272cc8b79e8dd419da22b3e7fbd561a7051", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.6.2
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling tokio-io v0.1.10
[INFO] [stderr]    Compiling failure v0.1.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.6.1
[INFO] [stderr]    Compiling tokio-timer v0.2.8
[INFO] [stderr]    Compiling speedometer v0.2.2
[INFO] [stderr]    Compiling crossbeam-deque v0.6.2
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling tokio-threadpool v0.1.9
[INFO] [stderr]    Compiling tokio-reactor v0.1.7
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-uds v0.2.4
[INFO] [stderr]    Compiling tokio-tcp v0.1.2
[INFO] [stderr]    Compiling tokio-fs v0.1.4
[INFO] [stderr]    Compiling tokio v0.1.13
[INFO] [stderr]    Compiling assets-benchmark 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(duration_as_u128)]
[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 compile `assets-benchmark`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "4d6853d92847bb32f5309441b4d9c272cc8b79e8dd419da22b3e7fbd561a7051", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d6853d92847bb32f5309441b4d9c272cc8b79e8dd419da22b3e7fbd561a7051", kill_on_drop: false }`
[INFO] [stdout] 4d6853d92847bb32f5309441b4d9c272cc8b79e8dd419da22b3e7fbd561a7051