[INFO] cloning repository https://github.com/ali-9/rust-gif
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ali-9/rust-gif" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fali-9%2Frust-gif", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fali-9%2Frust-gif'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 60802e81935b06a6a82bb4bd1fa032a4737da09f
[INFO] documenting ali-9/rust-gif 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%2Fali-9%2Frust-gif" "/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/ali-9/rust-gif 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/ali-9/rust-gif
[INFO] finished tweaking git repo https://github.com/ali-9/rust-gif
[INFO] tweaked toml for git repo https://github.com/ali-9/rust-gif written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ali-9/rust-gif 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rgb v0.8.16
[INFO] [stderr]   Downloaded color_quant v1.0.1
[INFO] [stderr]   Downloaded bitflags v1.2.1
[INFO] [stderr]   Downloaded byteorder v1.3.4
[INFO] [stderr]   Downloaded crc32fast v1.2.0
[INFO] [stderr]   Downloaded inflate v0.4.5
[INFO] [stderr]   Downloaded deflate v0.8.3
[INFO] [stderr]   Downloaded png v0.16.1
[INFO] [stderr]   Downloaded adler32 v1.0.4
[INFO] [stderr]   Downloaded lzw v0.10.0
[INFO] [stderr]   Downloaded gif v0.10.3
[INFO] [stderr]   Downloaded gif-dispose v2.2.0
[INFO] [stderr]   Downloaded imgref v1.4.0
[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] 8540fdb40bdeccad0ba9acf4ebf2cf94e0032f48930bdbd5ca1be5cec9500a94
[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" "8540fdb40bdeccad0ba9acf4ebf2cf94e0032f48930bdbd5ca1be5cec9500a94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8540fdb40bdeccad0ba9acf4ebf2cf94e0032f48930bdbd5ca1be5cec9500a94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8540fdb40bdeccad0ba9acf4ebf2cf94e0032f48930bdbd5ca1be5cec9500a94", kill_on_drop: false }`
[INFO] [stdout] 8540fdb40bdeccad0ba9acf4ebf2cf94e0032f48930bdbd5ca1be5cec9500a94
[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] 7611fc19a54171e4709e70fefaf2596509a2a6e330014be3b3b57ab22934cbca
[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" "7611fc19a54171e4709e70fefaf2596509a2a6e330014be3b3b57ab22934cbca", kill_on_drop: false }`
[INFO] [stderr]     Checking imgref v1.4.0
[INFO] [stderr]     Checking rgb v0.8.16
[INFO] [stderr]     Checking deflate v0.8.3
[INFO] [stderr]     Checking gif-dispose v2.2.0
[INFO] [stderr]     Checking png v0.16.1
[INFO] [stderr]  Documenting rust-gif v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.62s
[INFO] running `Command { std: "docker" "inspect" "7611fc19a54171e4709e70fefaf2596509a2a6e330014be3b3b57ab22934cbca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7611fc19a54171e4709e70fefaf2596509a2a6e330014be3b3b57ab22934cbca", kill_on_drop: false }`
[INFO] [stdout] 7611fc19a54171e4709e70fefaf2596509a2a6e330014be3b3b57ab22934cbca