[INFO] fetching crate png 0.16.7...
[INFO] documenting png-0.16.7 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate png 0.16.7 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate png 0.16.7 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 png 0.16.7
[INFO] finished tweaking crates.io crate png 0.16.7
[INFO] tweaked toml for crates.io crate png 0.16.7 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate png 0.16.7 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]  Downloading crates ...
[INFO] [stderr]   Downloaded glutin_glx_sys v0.1.6
[INFO] [stderr]   Downloaded glutin v0.20.1
[INFO] [stderr]   Downloaded raw-window-handle v0.3.3
[INFO] [stderr]   Downloaded glutin_wgl_sys v0.1.4
[INFO] [stderr]   Downloaded gl_generator v0.11.0
[INFO] [stderr]   Downloaded glutin_gles2_sys v0.1.4
[INFO] [stderr]   Downloaded deflate v0.8.4
[INFO] [stderr]   Downloaded glutin_egl_sys v0.1.4
[INFO] [stderr]   Downloaded winit v0.19.5
[INFO] [stderr]   Downloaded glium v0.24.0
[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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 85e3b8b3c92ad37c3b51941caf86d5823d544990fa1f7db9b8e1c2fb7e6c06c7
[INFO] running `Command { std: "docker" "start" "-a" "85e3b8b3c92ad37c3b51941caf86d5823d544990fa1f7db9b8e1c2fb7e6c06c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85e3b8b3c92ad37c3b51941caf86d5823d544990fa1f7db9b8e1c2fb7e6c06c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85e3b8b3c92ad37c3b51941caf86d5823d544990fa1f7db9b8e1c2fb7e6c06c7", kill_on_drop: false }`
[INFO] [stdout] 85e3b8b3c92ad37c3b51941caf86d5823d544990fa1f7db9b8e1c2fb7e6c06c7
[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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 286b507ec8f92858e14f07a2418299573999960aadc5f86251fa5e4a9e7d2089
[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" "286b507ec8f92858e14f07a2418299573999960aadc5f86251fa5e4a9e7d2089", kill_on_drop: false }`
[INFO] [stderr]     Checking miniz_oxide v0.3.7
[INFO] [stderr]     Checking deflate v0.8.4
[INFO] [stderr]  Documenting png v0.16.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.48s
[INFO] running `Command { std: "docker" "inspect" "286b507ec8f92858e14f07a2418299573999960aadc5f86251fa5e4a9e7d2089", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "286b507ec8f92858e14f07a2418299573999960aadc5f86251fa5e4a9e7d2089", kill_on_drop: false }`
[INFO] [stdout] 286b507ec8f92858e14f07a2418299573999960aadc5f86251fa5e4a9e7d2089