[INFO] cloning repository https://github.com/laohanlinux/util-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/laohanlinux/util-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaohanlinux%2Futil-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaohanlinux%2Futil-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a525a0e30e7eefe1d7abafa9d46b65839806254e
[INFO] testing laohanlinux/util-rs against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaohanlinux%2Futil-rs" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/laohanlinux/util-rs on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/laohanlinux/util-rs
[INFO] finished tweaking git repo https://github.com/laohanlinux/util-rs
[INFO] tweaked toml for git repo https://github.com/laohanlinux/util-rs written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/laohanlinux/util-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 76c27ee7ed4def4b228200ae8d37d3ef369a7675ecfa5043f5aff2d9b7e20120
[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" "76c27ee7ed4def4b228200ae8d37d3ef369a7675ecfa5043f5aff2d9b7e20120", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76c27ee7ed4def4b228200ae8d37d3ef369a7675ecfa5043f5aff2d9b7e20120", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76c27ee7ed4def4b228200ae8d37d3ef369a7675ecfa5043f5aff2d9b7e20120", kill_on_drop: false }`
[INFO] [stdout] 76c27ee7ed4def4b228200ae8d37d3ef369a7675ecfa5043f5aff2d9b7e20120
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "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] 59ec65e54eb16b5baddc4b1f4475a1960f1e12c87574f5d1e2972754230ecb5f
[INFO] running `Command { std: "docker" "start" "-a" "59ec65e54eb16b5baddc4b1f4475a1960f1e12c87574f5d1e2972754230ecb5f", kill_on_drop: false }`
[INFO] [stderr]    Compiling ext-fs v0.1.0 (/opt/rustwide/workdir/ext-fs)
[INFO] [stderr]    Compiling counter v0.5.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> ext-fs/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(result_map_or_else)]
[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 `ext-fs`
[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" "59ec65e54eb16b5baddc4b1f4475a1960f1e12c87574f5d1e2972754230ecb5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59ec65e54eb16b5baddc4b1f4475a1960f1e12c87574f5d1e2972754230ecb5f", kill_on_drop: false }`
[INFO] [stdout] 59ec65e54eb16b5baddc4b1f4475a1960f1e12c87574f5d1e2972754230ecb5f
