[INFO] fetching crate leetcode_test 0.1.2...
[INFO] checking leetcode_test-0.1.2 against beta-2021-10-15 for beta-1.56-3
[INFO] extracting crate leetcode_test 0.1.2 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate leetcode_test 0.1.2 on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate leetcode_test 0.1.2
[INFO] finished tweaking crates.io crate leetcode_test 0.1.2
[INFO] tweaked toml for crates.io crate leetcode_test 0.1.2 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5bd21a5d0e7ad1a00718f5ae37ea9c75a28e0ddbb4aa13b99ee79068c20645c9
[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" "5bd21a5d0e7ad1a00718f5ae37ea9c75a28e0ddbb4aa13b99ee79068c20645c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5bd21a5d0e7ad1a00718f5ae37ea9c75a28e0ddbb4aa13b99ee79068c20645c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bd21a5d0e7ad1a00718f5ae37ea9c75a28e0ddbb4aa13b99ee79068c20645c9", kill_on_drop: false }`
[INFO] [stdout] 5bd21a5d0e7ad1a00718f5ae37ea9c75a28e0ddbb4aa13b99ee79068c20645c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--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] 5fcc464bb8d83652adb38dd6714ed57a28494b031d58837247d9e91df81bae74
[INFO] running `Command { std: "docker" "start" "-a" "5fcc464bb8d83652adb38dd6714ed57a28494b031d58837247d9e91df81bae74", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking leetcode_test v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde_json v1.0.68
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> tests/test.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[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 `leetcode_test` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "5fcc464bb8d83652adb38dd6714ed57a28494b031d58837247d9e91df81bae74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fcc464bb8d83652adb38dd6714ed57a28494b031d58837247d9e91df81bae74", kill_on_drop: false }`
[INFO] [stdout] 5fcc464bb8d83652adb38dd6714ed57a28494b031d58837247d9e91df81bae74
