[INFO] cloning repository https://github.com/gburgessiv/llvmbb-monitor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gburgessiv/llvmbb-monitor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgburgessiv%2Fllvmbb-monitor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgburgessiv%2Fllvmbb-monitor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e12ae402a516372e9127d37d73d17fb7bccdb353
[INFO] testing gburgessiv/llvmbb-monitor against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgburgessiv%2Fllvmbb-monitor" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gburgessiv/llvmbb-monitor 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/gburgessiv/llvmbb-monitor
[INFO] finished tweaking git repo https://github.com/gburgessiv/llvmbb-monitor
[INFO] tweaked toml for git repo https://github.com/gburgessiv/llvmbb-monitor written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/gburgessiv/llvmbb-monitor 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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 7c98e0b028665e891410603a2f1328ec9e472498a36a8ab7454fdd8cfe40228b
[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" "7c98e0b028665e891410603a2f1328ec9e472498a36a8ab7454fdd8cfe40228b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c98e0b028665e891410603a2f1328ec9e472498a36a8ab7454fdd8cfe40228b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c98e0b028665e891410603a2f1328ec9e472498a36a8ab7454fdd8cfe40228b", kill_on_drop: false }`
[INFO] [stdout] 7c98e0b028665e891410603a2f1328ec9e472498a36a8ab7454fdd8cfe40228b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 3227a6d4efe742407e1921b56be8acc41851cb5eeaef9500f3b2c0ca9e52c8c9
[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" "3227a6d4efe742407e1921b56be8acc41851cb5eeaef9500f3b2c0ca9e52c8c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serenity v0.10.5
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling libsqlite3-sys v0.20.1
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling flate2 v1.0.20
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling git-version-macro v0.3.4
[INFO] [stderr]    Compiling futures-util v0.3.14
[INFO] [stderr]    Compiling pin-project v1.0.7
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling mio v0.7.11
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]    Compiling git-version v0.3.4
[INFO] [stderr]    Compiling tracing v0.1.25
[INFO] [stderr]    Compiling tungstenite v0.11.1
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling serde_urlencoded v0.7.0
[INFO] [stderr]    Compiling futures-executor v0.3.14
[INFO] [stderr]    Compiling webpki v0.21.4
[INFO] [stderr]    Compiling sct v0.6.1
[INFO] [stderr]    Compiling futures v0.3.14
[INFO] [stderr]    Compiling simple_logger v1.11.0
[INFO] [stderr]    Compiling rustls v0.19.1
[INFO] [stderr]    Compiling webpki-roots v0.21.1
[INFO] [stderr]    Compiling webpki-roots v0.20.0
[INFO] [stderr]    Compiling tokio-util v0.6.6
[INFO] [stderr]    Compiling tokio-native-tls v0.3.0
[INFO] [stderr]    Compiling async-compression v0.3.7
[INFO] [stderr]    Compiling h2 v0.3.2
[INFO] [stderr]    Compiling tokio-rustls v0.22.0
[INFO] [stderr]    Compiling async-tungstenite v0.11.0
[INFO] [stderr]    Compiling rusqlite v0.24.2
[INFO] [stderr]    Compiling hyper v0.14.7
[INFO] [stderr]    Compiling hyper-tls v0.5.0
[INFO] [stderr]    Compiling hyper-rustls v0.22.1
[INFO] [stderr]    Compiling reqwest v0.11.3
[INFO] [stderr]    Compiling llvm_buildbot_monitor 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(is_sorted)]
[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 `llvm_buildbot_monitor` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "3227a6d4efe742407e1921b56be8acc41851cb5eeaef9500f3b2c0ca9e52c8c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3227a6d4efe742407e1921b56be8acc41851cb5eeaef9500f3b2c0ca9e52c8c9", kill_on_drop: false }`
[INFO] [stdout] 3227a6d4efe742407e1921b56be8acc41851cb5eeaef9500f3b2c0ca9e52c8c9