[INFO] cloning repository https://github.com/vigoo/red
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vigoo/red" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvigoo%2Fred", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvigoo%2Fred'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c713221efd2aceb424d9a85247db2cb0f0c4a45c
[INFO] documenting vigoo/red against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvigoo%2Fred" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vigoo/red 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/vigoo/red
[INFO] finished tweaking git repo https://github.com/vigoo/red
[INFO] tweaked toml for git repo https://github.com/vigoo/red written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/vigoo/red 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 4296258a2ae6a3d5e0912207e0b1012f99b15ce30001fbb1a280fe9888cf53be
[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" "4296258a2ae6a3d5e0912207e0b1012f99b15ce30001fbb1a280fe9888cf53be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4296258a2ae6a3d5e0912207e0b1012f99b15ce30001fbb1a280fe9888cf53be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4296258a2ae6a3d5e0912207e0b1012f99b15ce30001fbb1a280fe9888cf53be", kill_on_drop: false }`
[INFO] [stdout] 4296258a2ae6a3d5e0912207e0b1012f99b15ce30001fbb1a280fe9888cf53be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "RUSTDOCFLAGS=--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" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 24ab17bc50a6e0243c2e27f35456e2853ac956379b912da0c9ac68b3d207241c
[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" "24ab17bc50a6e0243c2e27f35456e2853ac956379b912da0c9ac68b3d207241c", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]     Checking crossterm_utils v0.2.1
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking num-integer v0.1.41
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking serde-hjson v0.8.2
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]    Compiling riker-macros v0.1.0
[INFO] [stderr]     Checking crossterm_screen v0.2.1
[INFO] [stderr]     Checking crossterm_cursor v0.2.1
[INFO] [stderr]     Checking crossterm_style v0.3.1
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking crossterm_terminal v0.2.2
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking crossterm_input v0.3.3
[INFO] [stderr]     Checking crossterm v0.9.3
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking rut v0.1.0 (/opt/rustwide/workdir/rut)
[INFO] [stderr]  Documenting rut v0.1.0 (/opt/rustwide/workdir/rut)
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking config v0.9.3
[INFO] [stderr]     Checking riker v0.3.2
[INFO] [stderr]     Checking riker-patterns v0.3.2
[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/riker-patterns-0.3.2/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(arbitrary_self_types)]
[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 `riker-patterns`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "24ab17bc50a6e0243c2e27f35456e2853ac956379b912da0c9ac68b3d207241c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24ab17bc50a6e0243c2e27f35456e2853ac956379b912da0c9ac68b3d207241c", kill_on_drop: false }`
[INFO] [stdout] 24ab17bc50a6e0243c2e27f35456e2853ac956379b912da0c9ac68b3d207241c
