[INFO] fetching crate randen 0.0.0...
[INFO] checking randen-0.0.0 against beta-2021-10-15 for beta-1.56-3
[INFO] extracting crate randen 0.0.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate randen 0.0.0 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 randen 0.0.0
[INFO] finished tweaking crates.io crate randen 0.0.0
[INFO] tweaked toml for crates.io crate randen 0.0.0 written to /workspace/builds/worker-4/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 36a94cdf8dea8764f443e5af55f6954f260442b11a2bc8e21ec75f18d80a4fa8
[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" "36a94cdf8dea8764f443e5af55f6954f260442b11a2bc8e21ec75f18d80a4fa8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36a94cdf8dea8764f443e5af55f6954f260442b11a2bc8e21ec75f18d80a4fa8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36a94cdf8dea8764f443e5af55f6954f260442b11a2bc8e21ec75f18d80a4fa8", kill_on_drop: false }`
[INFO] [stdout] 36a94cdf8dea8764f443e5af55f6954f260442b11a2bc8e21ec75f18d80a4fa8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 87b7d69133e0e24e91214e5ba8486a63a4c9148ad93099fa99b5488c0cbf343f
[INFO] running `Command { std: "docker" "start" "-a" "87b7d69133e0e24e91214e5ba8486a63a4c9148ad93099fa99b5488c0cbf343f", kill_on_drop: false }`
[INFO] [stderr]     Checking rand v0.4.6
[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/rand-0.4.6/src/lib.rs:248:39
[INFO] [stdout]     |
[INFO] [stdout] 248 | #![cfg_attr(feature = "i128_support", feature(i128_type, i128))]
[INFO] [stdout]     |                                       ^^^^^^^^^^^^^^^^^^^^^^^^
[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 `rand` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "87b7d69133e0e24e91214e5ba8486a63a4c9148ad93099fa99b5488c0cbf343f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87b7d69133e0e24e91214e5ba8486a63a4c9148ad93099fa99b5488c0cbf343f", kill_on_drop: false }`
[INFO] [stdout] 87b7d69133e0e24e91214e5ba8486a63a4c9148ad93099fa99b5488c0cbf343f
