[INFO] cloning repository https://github.com/auyer/screenshot-scaledown
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/auyer/screenshot-scaledown" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fauyer%2Fscreenshot-scaledown", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fauyer%2Fscreenshot-scaledown'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 36ff1db94af27f2b0670c4e4ebfe0d7b883d8f4c
[INFO] documenting auyer/screenshot-scaledown 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%2Fauyer%2Fscreenshot-scaledown" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/auyer/screenshot-scaledown 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/auyer/screenshot-scaledown
[INFO] finished tweaking git repo https://github.com/auyer/screenshot-scaledown
[INFO] tweaked toml for git repo https://github.com/auyer/screenshot-scaledown written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/auyer/screenshot-scaledown 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]     Updating git repository `https://github.com/servo/rust-xlib`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded livesplit-hotkey v0.5.0
[INFO] [stderr]   Downloaded lazy-bytes-cast v5.0.1
[INFO] [stderr]   Downloaded gethostname v0.2.1
[INFO] [stderr]   Downloaded stdweb v0.3.0
[INFO] [stderr]   Downloaded image v0.23.5
[INFO] [stderr]   Downloaded png v0.16.4
[INFO] [stderr]   Downloaded promising-future v0.2.4
[INFO] [stderr]   Downloaded x11rb v0.5.0
[INFO] [stderr]   Downloaded clipboard-win v3.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 0e779b7782cf126c49ca6a428ec5a12bfc161982b371d37aa30cc281a3b4a99a
[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" "0e779b7782cf126c49ca6a428ec5a12bfc161982b371d37aa30cc281a3b4a99a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e779b7782cf126c49ca6a428ec5a12bfc161982b371d37aa30cc281a3b4a99a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e779b7782cf126c49ca6a428ec5a12bfc161982b371d37aa30cc281a3b4a99a", kill_on_drop: false }`
[INFO] [stdout] 0e779b7782cf126c49ca6a428ec5a12bfc161982b371d37aa30cc281a3b4a99a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 086cbb225e881ef67744d836e2204b80cb01679c1fa599d60b5bb9cd351e703e
[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" "086cbb225e881ef67744d836e2204b80cb01679c1fa599d60b5bb9cd351e703e", 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]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking gethostname v0.2.1
[INFO] [stderr]     Checking xlib v0.1.0 (https://github.com/servo/rust-xlib#38ce24e6)
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking crossbeam-queue v0.2.2
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking png v0.16.4
[INFO] [stderr]     Checking x11rb v0.5.0
[INFO] [stderr]     Checking promising-future v0.2.4
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking livesplit-hotkey v0.5.0
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.19
[INFO] [stderr]     Checking image v0.23.5
[INFO] [stderr]  Documenting screenshot-scaledown v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.39s
[INFO] running `Command { std: "docker" "inspect" "086cbb225e881ef67744d836e2204b80cb01679c1fa599d60b5bb9cd351e703e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "086cbb225e881ef67744d836e2204b80cb01679c1fa599d60b5bb9cd351e703e", kill_on_drop: false }`
[INFO] [stdout] 086cbb225e881ef67744d836e2204b80cb01679c1fa599d60b5bb9cd351e703e