[INFO] cloning repository https://github.com/redox-os/userutils
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/redox-os/userutils" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredox-os%2Fuserutils", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredox-os%2Fuserutils'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 09a04fc55b3b42542c028ead17b5c2eeae50d761
[INFO] testing redox-os/userutils against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredox-os%2Fuserutils" "/workspace/builds/worker-72/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-72/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/redox-os/userutils 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/redox-os/userutils
[INFO] finished tweaking git repo https://github.com/redox-os/userutils
[INFO] tweaked toml for git repo https://github.com/redox-os/userutils written to /workspace/builds/worker-72/source/Cargo.toml
[INFO] crate git repo https://github.com/redox-os/userutils 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded blake2b_simd v0.5.11
[INFO] [stderr]   Downloaded bytecount v0.6.2
[INFO] [stderr]   Downloaded redox_termios v0.1.2
[INFO] [stderr]   Downloaded rust-argon2 v0.8.3
[INFO] [stderr]   Downloaded redox_liner v0.5.1
[INFO] [stderr]   Downloaded termion v1.5.6
[INFO] [stderr]   Downloaded redox_users v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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] fba602cdeb70e54989abd1b4ab99810e7f4b3e9f409ede6c2f1d7bc3e0253ea0
[INFO] running `Command { std: "docker" "start" "-a" "fba602cdeb70e54989abd1b4ab99810e7f4b3e9f409ede6c2f1d7bc3e0253ea0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fba602cdeb70e54989abd1b4ab99810e7f4b3e9f409ede6c2f1d7bc3e0253ea0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fba602cdeb70e54989abd1b4ab99810e7f4b3e9f409ede6c2f1d7bc3e0253ea0", kill_on_drop: false }`
[INFO] [stdout] fba602cdeb70e54989abd1b4ab99810e7f4b3e9f409ede6c2f1d7bc3e0253ea0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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] [stdout] bf1794f895a62ca576884219090ab0c942dd832b41aaad8afc52c52f366c741d
[INFO] running `Command { std: "docker" "start" "-a" "bf1794f895a62ca576884219090ab0c942dd832b41aaad8afc52c52f366c741d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling arrayref v0.3.6
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling constant_time_eq v0.1.5
[INFO] [stderr]    Compiling base64 v0.13.0
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling bytecount v0.6.2
[INFO] [stderr]    Compiling extra v0.1.0 (https://gitlab.redox-os.org/redox-os/libextra.git#cf213969)
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling redox_syscall v0.2.9
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/redox_syscall-0.2.9/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(asm)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/redox_syscall-0.2.9/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(llvm_asm)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `redox_syscall`
[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" "bf1794f895a62ca576884219090ab0c942dd832b41aaad8afc52c52f366c741d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf1794f895a62ca576884219090ab0c942dd832b41aaad8afc52c52f366c741d", kill_on_drop: false }`
[INFO] [stdout] bf1794f895a62ca576884219090ab0c942dd832b41aaad8afc52c52f366c741d
