[INFO] cloning repository https://github.com/mheumann/trafficlight-avr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mheumann/trafficlight-avr" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmheumann%2Ftrafficlight-avr", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmheumann%2Ftrafficlight-avr'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 86915b52862bf3e8c5922f37ba876fa1bb63442c
[INFO] testing mheumann/trafficlight-avr against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmheumann%2Ftrafficlight-avr" "/workspace/builds/worker-65/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-65/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mheumann/trafficlight-avr on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mheumann/trafficlight-avr
[INFO] finished tweaking git repo https://github.com/mheumann/trafficlight-avr
[INFO] tweaked toml for git repo https://github.com/mheumann/trafficlight-avr written to /workspace/builds/worker-65/source/Cargo.toml
[INFO] crate git repo https://github.com/mheumann/trafficlight-avr already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cf757d892f88388179baa6f64d6006962160e695bb33edd68899a5b222179ff0
[INFO] running `Command { std: "docker" "start" "-a" "cf757d892f88388179baa6f64d6006962160e695bb33edd68899a5b222179ff0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf757d892f88388179baa6f64d6006962160e695bb33edd68899a5b222179ff0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf757d892f88388179baa6f64d6006962160e695bb33edd68899a5b222179ff0", kill_on_drop: false }`
[INFO] [stdout] cf757d892f88388179baa6f64d6006962160e695bb33edd68899a5b222179ff0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9198fe3bb7f5614581a43a54cb28495802a92d65f8a28b58b31410d2772d2569
[INFO] running `Command { std: "docker" "start" "-a" "9198fe3bb7f5614581a43a54cb28495802a92d65f8a28b58b31410d2772d2569", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling avr-std-stub v1.0.2
[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/avr-std-stub-1.0.2/src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(lang_items)]
[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 `avr-std-stub` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "9198fe3bb7f5614581a43a54cb28495802a92d65f8a28b58b31410d2772d2569", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9198fe3bb7f5614581a43a54cb28495802a92d65f8a28b58b31410d2772d2569", kill_on_drop: false }`
[INFO] [stdout] 9198fe3bb7f5614581a43a54cb28495802a92d65f8a28b58b31410d2772d2569