[INFO] cloning repository https://github.com/busyluo/roc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/busyluo/roc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbusyluo%2Froc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbusyluo%2Froc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d582ca067dc97572aa6a5f09624f52f368d40e93
[INFO] testing busyluo/roc against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbusyluo%2Froc" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/busyluo/roc 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/busyluo/roc
[INFO] finished tweaking git repo https://github.com/busyluo/roc
[INFO] tweaked toml for git repo https://github.com/busyluo/roc written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/busyluo/roc 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 2a840d3ed3efc1207e1d30bc6dfe8a34df5a65ed8a8fc8b2be6db62d76b9f661
[INFO] running `Command { std: "docker" "start" "-a" "2a840d3ed3efc1207e1d30bc6dfe8a34df5a65ed8a8fc8b2be6db62d76b9f661", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a840d3ed3efc1207e1d30bc6dfe8a34df5a65ed8a8fc8b2be6db62d76b9f661", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a840d3ed3efc1207e1d30bc6dfe8a34df5a65ed8a8fc8b2be6db62d76b9f661", kill_on_drop: false }`
[INFO] [stdout] 2a840d3ed3efc1207e1d30bc6dfe8a34df5a65ed8a8fc8b2be6db62d76b9f661
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 9cce4660fad1f7f73444ed17bff13a967687f99c944ce584333a368c4c00c373
[INFO] running `Command { std: "docker" "start" "-a" "9cce4660fad1f7f73444ed17bff13a967687f99c944ce584333a368c4c00c373", kill_on_drop: false }`
[INFO] [stderr]    Compiling roc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(exclusive_range_pattern)]
[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 `roc` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "9cce4660fad1f7f73444ed17bff13a967687f99c944ce584333a368c4c00c373", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cce4660fad1f7f73444ed17bff13a967687f99c944ce584333a368c4c00c373", kill_on_drop: false }`
[INFO] [stdout] 9cce4660fad1f7f73444ed17bff13a967687f99c944ce584333a368c4c00c373