[INFO] fetching crate wmfocus 1.1.4...
[INFO] documenting wmfocus-1.1.4 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate wmfocus 1.1.4 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate wmfocus 1.1.4 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 crates.io crate wmfocus 1.1.4
[INFO] finished tweaking crates.io crate wmfocus 1.1.4
[INFO] tweaked toml for crates.io crate wmfocus 1.1.4 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate wmfocus 1.1.4 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded xcb-util v0.3.0
[INFO] [stderr]   Downloaded servo-fontconfig v0.5.1
[INFO] [stderr]   Downloaded xkbcommon v0.4.0
[INFO] [stderr]   Downloaded font-loader v0.11.0
[INFO] [stderr]   Downloaded core-text v19.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 2c051674547226894868055b0695c40a0075642b4307091aa3a1af9631356152
[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" "2c051674547226894868055b0695c40a0075642b4307091aa3a1af9631356152", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c051674547226894868055b0695c40a0075642b4307091aa3a1af9631356152", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c051674547226894868055b0695c40a0075642b4307091aa3a1af9631356152", kill_on_drop: false }`
[INFO] [stdout] 2c051674547226894868055b0695c40a0075642b4307091aa3a1af9631356152
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] fb9b223d59e020c7206a3a96034bc70b1209d49ac8d33eb2a2eef1e04e0a3bce
[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" "fb9b223d59e020c7206a3a96034bc70b1209d49ac8d33eb2a2eef1e04e0a3bce", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.34
[INFO] [stderr]    Compiling strum v0.18.0
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling cairo-rs v0.9.1
[INFO] [stderr]    Compiling servo-fontconfig-sys v5.1.0
[INFO] [stderr]    Compiling x11 v2.18.2
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking css-color-parser v0.1.2
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling freetype-sys v0.13.1
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]    Compiling xcb v0.9.0
[INFO] [stderr]     Checking xkbcommon v0.4.0
[INFO] [stderr]     Checking clap v2.33.2
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]     Checking servo-fontconfig v0.5.1
[INFO] [stderr]     Checking font-loader v0.11.0
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]     Checking xcb-util v0.3.0
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.3
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling proc-macro-error v1.0.3
[INFO] [stderr]    Compiling thiserror v1.0.20
[INFO] [stderr]    Compiling glib-macros v0.10.1
[INFO] [stderr]    Compiling structopt-derive v0.4.9
[INFO] [stderr]    Compiling system-deps v1.3.2
[INFO] [stderr]     Checking pin-project v0.4.22
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]    Compiling glib-sys v0.10.0
[INFO] [stderr]    Compiling gobject-sys v0.10.0
[INFO] [stderr]    Compiling cairo-sys-rs v0.10.0
[INFO] [stderr]     Checking structopt v0.3.16
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking glib v0.10.1
[INFO] [stderr]  Documenting wmfocus v1.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 57.90s
[INFO] running `Command { std: "docker" "inspect" "fb9b223d59e020c7206a3a96034bc70b1209d49ac8d33eb2a2eef1e04e0a3bce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb9b223d59e020c7206a3a96034bc70b1209d49ac8d33eb2a2eef1e04e0a3bce", kill_on_drop: false }`
[INFO] [stdout] fb9b223d59e020c7206a3a96034bc70b1209d49ac8d33eb2a2eef1e04e0a3bce