[INFO] cloning repository https://github.com/MeirKriheli/rusmux
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MeirKriheli/rusmux" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMeirKriheli%2Frusmux", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMeirKriheli%2Frusmux'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0a67395883758b777e7ad99b8007544fb5c1ad6e
[INFO] documenting MeirKriheli/rusmux against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMeirKriheli%2Frusmux" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MeirKriheli/rusmux on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MeirKriheli/rusmux
[INFO] finished tweaking git repo https://github.com/MeirKriheli/rusmux
[INFO] tweaked toml for git repo https://github.com/MeirKriheli/rusmux written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/MeirKriheli/rusmux already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde v1.0.105
[INFO] [stderr]   Downloaded shell32-sys v0.1.2
[INFO] [stderr]   Downloaded thiserror v1.0.11
[INFO] [stderr]   Downloaded libc v0.2.68
[INFO] [stderr]   Downloaded app_dirs v1.2.1
[INFO] [stderr]   Downloaded serde_derive v1.0.105
[INFO] [stderr]   Downloaded proc-macro2 v1.0.9
[INFO] [stderr]   Downloaded ole32-sys v0.2.0
[INFO] [stderr]   Downloaded serde_yaml v0.8.11
[INFO] [stderr]   Downloaded yaml-rust v0.4.3
[INFO] [stderr]   Downloaded thiserror-impl v1.0.11
[INFO] [stderr]   Downloaded syn v1.0.16
[INFO] [stderr]   Downloaded quote v1.0.3
[INFO] [stderr]   Downloaded dtoa v0.4.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6f979c69b99731011b0432827e2f6651c8d1da9cc066d8246b971a5906dc071e
[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" "6f979c69b99731011b0432827e2f6651c8d1da9cc066d8246b971a5906dc071e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f979c69b99731011b0432827e2f6651c8d1da9cc066d8246b971a5906dc071e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f979c69b99731011b0432827e2f6651c8d1da9cc066d8246b971a5906dc071e", kill_on_drop: false }`
[INFO] [stdout] 6f979c69b99731011b0432827e2f6651c8d1da9cc066d8246b971a5906dc071e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b780b02b66b3b550a24e633f15ce8579b51efdfe43dbf259fce50ddeba173ca9
[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" "b780b02b66b3b550a24e633f15ce8579b51efdfe43dbf259fce50ddeba173ca9", kill_on_drop: false }`
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking yaml-rust v0.4.3
[INFO] [stderr]     Checking app_dirs v1.2.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]    Compiling thiserror-impl v1.0.11
[INFO] [stderr]     Checking thiserror v1.0.11
[INFO] [stderr]     Checking serde v1.0.105
[INFO] [stderr]     Checking serde_yaml v0.8.11
[INFO] [stderr]  Documenting rusmux v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.10s
[INFO] running `Command { std: "docker" "inspect" "b780b02b66b3b550a24e633f15ce8579b51efdfe43dbf259fce50ddeba173ca9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b780b02b66b3b550a24e633f15ce8579b51efdfe43dbf259fce50ddeba173ca9", kill_on_drop: false }`
[INFO] [stdout] b780b02b66b3b550a24e633f15ce8579b51efdfe43dbf259fce50ddeba173ca9