[INFO] fetching crate yoloxide 0.4.3...
[INFO] testing yoloxide-0.4.3 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate yoloxide 0.4.3 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate yoloxide 0.4.3 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 crates.io crate yoloxide 0.4.3
[INFO] finished tweaking crates.io crate yoloxide 0.4.3
[INFO] tweaked toml for crates.io crate yoloxide 0.4.3 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate yoloxide 0.4.3 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]  Downloading crates ...
[INFO] [stderr]   Downloaded futures v0.1.28
[INFO] [stderr]   Downloaded js-sys v0.3.27
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.50
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.50
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.50
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.50
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.50
[INFO] [stderr]   Downloaded wasm-bindgen-webidl v0.2.50
[INFO] [stderr]   Downloaded cylon_ast v0.3.2
[INFO] [stderr]   Downloaded backtrace v0.3.35
[INFO] [stderr]   Downloaded proc-macro2 v1.0.1
[INFO] [stderr]   Downloaded web-sys v0.3.27
[INFO] [stderr]   Downloaded yolol_number v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] d66bab95eda1a4bef829b8b2a269c13d660962385a10670fbd5eff082d7ad99b
[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" "d66bab95eda1a4bef829b8b2a269c13d660962385a10670fbd5eff082d7ad99b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d66bab95eda1a4bef829b8b2a269c13d660962385a10670fbd5eff082d7ad99b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d66bab95eda1a4bef829b8b2a269c13d660962385a10670fbd5eff082d7ad99b", kill_on_drop: false }`
[INFO] [stdout] d66bab95eda1a4bef829b8b2a269c13d660962385a10670fbd5eff082d7ad99b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] [stdout] 68420dbd771077b44769931e016572b9e18449b52ba76dd0c29027766a4937b6
[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" "68420dbd771077b44769931e016572b9e18449b52ba76dd0c29027766a4937b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.1
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling serde v1.0.99
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling regex-syntax v0.6.11
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling regex v1.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling yolol_number v0.7.0
[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/yolol_number-0.7.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(trait_alias)]
[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 `yolol_number`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "68420dbd771077b44769931e016572b9e18449b52ba76dd0c29027766a4937b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68420dbd771077b44769931e016572b9e18449b52ba76dd0c29027766a4937b6", kill_on_drop: false }`
[INFO] [stdout] 68420dbd771077b44769931e016572b9e18449b52ba76dd0c29027766a4937b6