[INFO] cloning repository https://github.com/cassaundra/lang-char-freq
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cassaundra/lang-char-freq" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcassaundra%2Flang-char-freq", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcassaundra%2Flang-char-freq'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d3af22995de9acdea8a43b03c82732f4ba0f097b
[INFO] documenting cassaundra/lang-char-freq 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%2Fcassaundra%2Flang-char-freq" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cassaundra/lang-char-freq 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/cassaundra/lang-char-freq
[INFO] finished tweaking git repo https://github.com/cassaundra/lang-char-freq
[INFO] tweaked toml for git repo https://github.com/cassaundra/lang-char-freq written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/cassaundra/lang-char-freq 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 5049ac2703aa1ce6b46f5793b54cafd7abb638ae79a03cc296b6fc87111be50d
[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" "5049ac2703aa1ce6b46f5793b54cafd7abb638ae79a03cc296b6fc87111be50d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5049ac2703aa1ce6b46f5793b54cafd7abb638ae79a03cc296b6fc87111be50d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5049ac2703aa1ce6b46f5793b54cafd7abb638ae79a03cc296b6fc87111be50d", kill_on_drop: false }`
[INFO] [stdout] 5049ac2703aa1ce6b46f5793b54cafd7abb638ae79a03cc296b6fc87111be50d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 4dd51310b38a08e0e177013f523186d28327d7d056d2641b5bbec41ba6b5fda0
[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" "4dd51310b38a08e0e177013f523186d28327d7d056d2641b5bbec41ba6b5fda0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling palette v0.5.0
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]    Compiling servo-fontconfig-sys v4.0.9
[INFO] [stderr]     Checking tracing-core v0.1.10
[INFO] [stderr]     Checking sharded-slab v0.0.8
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]    Compiling bzip2-sys v0.1.8+1.0.8
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking dirs v1.0.5
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[INFO] [stderr]     Checking tar v0.4.26
[INFO] [stderr]     Checking native-tls v0.2.4
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]    Compiling servo-freetype-sys v4.0.5
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]     Checking png v0.15.3
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking freetype v0.4.1
[INFO] [stderr]     Checking servo-fontconfig v0.4.0
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking num-integer v0.1.42
[INFO] [stderr]     Checking euclid v0.20.8
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]     Checking rusttype v0.8.2
[INFO] [stderr]     Checking zip v0.5.5
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking num-iter v0.1.40
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[INFO] [stderr]     Checking image v0.22.5
[INFO] [stderr]     Checking lyon_geom v0.14.1
[INFO] [stderr]     Checking lyon_path v0.14.0
[INFO] [stderr]     Checking font-kit v0.4.0
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[INFO] [stderr]    Compiling palette_derive v0.5.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.7
[INFO] [stderr]     Checking tokio v0.2.13
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking tracing v0.1.13
[INFO] [stderr]     Checking pin-project v0.4.8
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking plotters v0.2.12
[INFO] [stderr]     Checking h2 v0.2.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking hyper v0.13.4
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking serde_json v1.0.50
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking tracing-serde v0.1.1
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking tracing-subscriber v0.2.4
[INFO] [stderr]     Checking reqwest v0.10.4
[INFO] [stderr]  Documenting lang-char-freq v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 15s
[INFO] running `Command { std: "docker" "inspect" "4dd51310b38a08e0e177013f523186d28327d7d056d2641b5bbec41ba6b5fda0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dd51310b38a08e0e177013f523186d28327d7d056d2641b5bbec41ba6b5fda0", kill_on_drop: false }`
[INFO] [stdout] 4dd51310b38a08e0e177013f523186d28327d7d056d2641b5bbec41ba6b5fda0