[INFO] fetching crate piston2d-graphics_tree 0.30.0...
[INFO] documenting piston2d-graphics_tree-0.30.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate piston2d-graphics_tree 0.30.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate piston2d-graphics_tree 0.30.0 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 piston2d-graphics_tree 0.30.0
[INFO] finished tweaking crates.io crate piston2d-graphics_tree 0.30.0
[INFO] tweaked toml for crates.io crate piston2d-graphics_tree 0.30.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate piston2d-graphics_tree 0.30.0 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 fps_counter v1.0.0
[INFO] [stderr]   Downloaded piston_window v0.112.0
[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] c39ee4d4628b9bac81934612ec85e3a7ee2fbb518f9f3db4bd4b799a73b47f4a
[INFO] running `Command { std: "docker" "start" "-a" "c39ee4d4628b9bac81934612ec85e3a7ee2fbb518f9f3db4bd4b799a73b47f4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c39ee4d4628b9bac81934612ec85e3a7ee2fbb518f9f3db4bd4b799a73b47f4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c39ee4d4628b9bac81934612ec85e3a7ee2fbb518f9f3db4bd4b799a73b47f4a", kill_on_drop: false }`
[INFO] [stdout] c39ee4d4628b9bac81934612ec85e3a7ee2fbb518f9f3db4bd4b799a73b47f4a
[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] a9ad833a8a1675b743850a6a3dd49695ed098569aaaff53625f1273282add24e
[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" "a9ad833a8a1675b743850a6a3dd49695ed098569aaaff53625f1273282add24e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling rayon-core v1.8.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking either v1.6.0
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking piston-float v1.0.0
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking read_color v1.0.0
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking bytemuck v1.3.1
[INFO] [stderr]     Checking interpolation v0.2.0
[INFO] [stderr]     Checking piston-texture v0.8.0
[INFO] [stderr]     Checking range v1.0.0
[INFO] [stderr]     Checking miniz_oxide v0.3.7
[INFO] [stderr]     Checking piston-viewport v1.0.0
[INFO] [stderr]     Checking vecmath v1.0.0
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling rayon v1.4.0
[INFO] [stderr]    Compiling num-rational v0.3.0
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]     Checking stb_truetype v0.3.1
[INFO] [stderr]     Checking deflate v0.8.6
[INFO] [stderr]     Checking tiff v0.5.0
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]     Checking png v0.16.7
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking ordered-float v1.1.0
[INFO] [stderr]     Checking rusttype v0.8.3
[INFO] [stderr]     Checking piston2d-graphics v0.37.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]     Checking image v0.23.8
[INFO] [stderr]  Documenting piston2d-graphics_tree v0.30.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.76s
[INFO] running `Command { std: "docker" "inspect" "a9ad833a8a1675b743850a6a3dd49695ed098569aaaff53625f1273282add24e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9ad833a8a1675b743850a6a3dd49695ed098569aaaff53625f1273282add24e", kill_on_drop: false }`
[INFO] [stdout] a9ad833a8a1675b743850a6a3dd49695ed098569aaaff53625f1273282add24e