[INFO] cloning repository https://github.com/sup34eva/matsuo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sup34eva/matsuo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsup34eva%2Fmatsuo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsup34eva%2Fmatsuo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 47fbf0b47212ff55b16a881d4d95c1af9e3aaed9
[INFO] testing sup34eva/matsuo against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsup34eva%2Fmatsuo" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sup34eva/matsuo 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/sup34eva/matsuo
[INFO] finished tweaking git repo https://github.com/sup34eva/matsuo
[INFO] tweaked toml for git repo https://github.com/sup34eva/matsuo written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/sup34eva/matsuo 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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 3e769291196e02346c8d0bd2a3e3dd4db59c0c9daa68210883dad07c8bf79828
[INFO] running `Command { std: "docker" "start" "-a" "3e769291196e02346c8d0bd2a3e3dd4db59c0c9daa68210883dad07c8bf79828", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e769291196e02346c8d0bd2a3e3dd4db59c0c9daa68210883dad07c8bf79828", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e769291196e02346c8d0bd2a3e3dd4db59c0c9daa68210883dad07c8bf79828", kill_on_drop: false }`
[INFO] [stdout] 3e769291196e02346c8d0bd2a3e3dd4db59c0c9daa68210883dad07c8bf79828
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] a49096b9979eb1304b31d761ea21e3aafb35a214010f08c1d838bfb365db96b4
[INFO] running `Command { std: "docker" "start" "-a" "a49096b9979eb1304b31d761ea21e3aafb35a214010f08c1d838bfb365db96b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.23
[INFO] [stderr]    Compiling num-traits v0.1.39
[INFO] [stderr]    Compiling itoa v0.3.1
[INFO] [stderr]    Compiling dtoa v0.4.1
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling byteorder v1.0.0
[INFO] [stderr]    Compiling rayon-core v1.0.2
[INFO] [stderr]    Compiling deque v0.3.2
[INFO] [stderr]    Compiling serde v1.0.8
[INFO] [stderr]    Compiling xml-rs v0.3.6
[INFO] [stderr]    Compiling x11-dl v2.14.0
[INFO] [stderr]    Compiling unreachable v0.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.8
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling fs2 v0.2.5
[INFO] [stderr]    Compiling thread-id v3.1.0
[INFO] [stderr]    Compiling shared_library v0.1.5
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling num_cpus v1.5.1
[INFO] [stderr]    Compiling wayland-scanner v0.8.7
[INFO] [stderr]    Compiling gl_generator v0.5.3
[INFO] [stderr]    Compiling serde_json v0.9.10
[INFO] [stderr]    Compiling memmap v0.4.0
[INFO] [stderr]    Compiling tempfile v2.1.5
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling thread_local v0.3.3
[INFO] [stderr]    Compiling regex v0.2.2
[INFO] [stderr]    Compiling wayland-client v0.8.7
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]    Compiling rayon v0.7.1
[INFO] [stderr]    Compiling gl v0.6.2
[INFO] [stderr]    Compiling glutin v0.8.1
[INFO] [stderr]    Compiling target_build_utils v0.3.1
[INFO] [stderr]    Compiling docopt v0.8.0
[INFO] [stderr]    Compiling bincode v0.8.0
[INFO] [stderr]    Compiling libloading v0.3.4
[INFO] [stderr]    Compiling dlib v0.3.1
[INFO] [stderr]    Compiling wayland-sys v0.8.7
[INFO] [stderr]    Compiling wayland-window v0.5.0
[INFO] [stderr]    Compiling wayland-kbd v0.8.0
[INFO] [stderr]    Compiling winit v0.6.4
[INFO] [stderr]    Compiling matsuo 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(slice_patterns, inclusive_range_syntax)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `slice_patterns` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stdout]   = help: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
[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 `matsuo` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "a49096b9979eb1304b31d761ea21e3aafb35a214010f08c1d838bfb365db96b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a49096b9979eb1304b31d761ea21e3aafb35a214010f08c1d838bfb365db96b4", kill_on_drop: false }`
[INFO] [stdout] a49096b9979eb1304b31d761ea21e3aafb35a214010f08c1d838bfb365db96b4