[INFO] cloning repository https://github.com/ltoddy/imgcat-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ltoddy/imgcat-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fltoddy%2Fimgcat-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fltoddy%2Fimgcat-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 603f17684d7a894c4ca66d473e9eb164b6a72b6c
[INFO] documenting ltoddy/imgcat-rs against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fltoddy%2Fimgcat-rs" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ltoddy/imgcat-rs on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ltoddy/imgcat-rs
[INFO] finished tweaking git repo https://github.com/ltoddy/imgcat-rs
[INFO] tweaked toml for git repo https://github.com/ltoddy/imgcat-rs written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/ltoddy/imgcat-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5f14a058f0d355fa9d1485ff7b5ab092c3d51a61a3217cff7cde1f10fb1e958e
[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" "5f14a058f0d355fa9d1485ff7b5ab092c3d51a61a3217cff7cde1f10fb1e958e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f14a058f0d355fa9d1485ff7b5ab092c3d51a61a3217cff7cde1f10fb1e958e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f14a058f0d355fa9d1485ff7b5ab092c3d51a61a3217cff7cde1f10fb1e958e", kill_on_drop: false }`
[INFO] [stdout] 5f14a058f0d355fa9d1485ff7b5ab092c3d51a61a3217cff7cde1f10fb1e958e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fac926a5278b3455ae407f1072afa89238c00fce4c33fb71d1018d33aaea6c17
[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" "fac926a5278b3455ae407f1072afa89238c00fce4c33fb71d1018d33aaea6c17", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]    Compiling structopt-derive v0.3.5
[INFO] [stderr]     Checking structopt v0.3.5
[INFO] [stderr]  Documenting imgcat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: environment variable `TERM` not defined
[INFO] [stdout]   --> src/main.rs:47:19
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let is_tmux = env!("TERM").starts_with("screen");
[INFO] [stdout]    |                   ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `imgcat`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name imgcat src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern base64=/opt/rustwide/target/debug/deps/libbase64-2cf622753e1ddd46.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-beda891852a57203.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "fac926a5278b3455ae407f1072afa89238c00fce4c33fb71d1018d33aaea6c17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fac926a5278b3455ae407f1072afa89238c00fce4c33fb71d1018d33aaea6c17", kill_on_drop: false }`
[INFO] [stdout] fac926a5278b3455ae407f1072afa89238c00fce4c33fb71d1018d33aaea6c17