[INFO] cloning repository https://github.com/etok414/fractal
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/etok414/fractal" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fetok414%2Ffractal", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fetok414%2Ffractal'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 25619b1c01c4e8a05c9848b3a30acfc6f03a3efb
[INFO] documenting etok414/fractal 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%2Fetok414%2Ffractal" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/etok414/fractal 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/etok414/fractal
[INFO] finished tweaking git repo https://github.com/etok414/fractal
[INFO] tweaked toml for git repo https://github.com/etok414/fractal written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/etok414/fractal 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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] bcf9cfc04eb9a8a903bda06e9995dbea1b788f929832e7999e7b51b14def2fdf
[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" "bcf9cfc04eb9a8a903bda06e9995dbea1b788f929832e7999e7b51b14def2fdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bcf9cfc04eb9a8a903bda06e9995dbea1b788f929832e7999e7b51b14def2fdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcf9cfc04eb9a8a903bda06e9995dbea1b788f929832e7999e7b51b14def2fdf", kill_on_drop: false }`
[INFO] [stdout] bcf9cfc04eb9a8a903bda06e9995dbea1b788f929832e7999e7b51b14def2fdf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ffba80f9959c5cad24c46f5ce0f50525f7839a0032f93e193d1becb0a7c2a221
[INFO] running `Command { std: "docker" "start" "-a" "ffba80f9959c5cad24c46f5ce0f50525f7839a0032f93e193d1becb0a7c2a221", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]    Compiling vulkano v0.13.0
[INFO] [stderr]     Checking half v1.3.0
[INFO] [stderr]     Checking vk-sys v0.4.0
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]     Checking instant v0.1.1
[INFO] [stderr]     Checking conrod_winit v0.66.0
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling cmake v0.1.41
[INFO] [stderr]     Checking petgraph v0.4.13
[INFO] [stderr]     Checking inflate v0.3.4
[INFO] [stderr]    Compiling x11-dl v2.18.3
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking getrandom v0.1.8
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking libloading v0.5.2
[INFO] [stderr]     Checking num-integer v0.1.41
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking euclid v0.20.1
[INFO] [stderr]     Checking line_drawing v0.7.0
[INFO] [stderr]     Checking pennereq v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.98
[INFO] [stderr]    Compiling conrod_derive v0.66.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking sid v0.5.2
[INFO] [stderr]     Checking enum_primitive v0.1.1
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]     Checking dlib v0.4.1
[INFO] [stderr]     Checking tiff v0.2.2
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling shaderc-sys v0.5.1
[INFO] [stderr]     Checking wayland-sys v0.21.13
[INFO] [stderr]     Checking num-iter v0.1.39
[INFO] [stderr]     Checking num-bigint v0.2.2
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking png v0.11.0
[INFO] [stderr]     Checking png v0.14.1
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking daggy v0.5.0
[INFO] [stderr]     Checking daggy v0.6.0
[INFO] [stderr]     Checking rusttype v0.7.7
[INFO] [stderr]     Checking crossbeam v0.7.2
[INFO] [stderr]     Checking rayon-core v1.5.0
[INFO] [stderr]     Checking lyon_geom v0.14.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]     Checking rayon v1.1.0
[INFO] [stderr]     Checking parking_lot_core v0.5.0
[INFO] [stderr]     Checking andrew v0.2.1
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]     Checking num-rational v0.2.2
[INFO] [stderr]     Checking lyon_path v0.14.0
[INFO] [stderr]     Checking parking_lot v0.8.0
[INFO] [stderr]    Compiling palette v0.4.1
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking lyon_algorithms v0.14.0
[INFO] [stderr]     Checking lyon_tessellation v0.14.1
[INFO] [stderr] error: could not compile `nix`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name nix /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nix-0.14.1/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata -Cembed-bitcode=no -C debuginfo=2 -C metadata=5f64fcb717098a68 -C extra-filename=-5f64fcb717098a68 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-bef5630b82c3f945.rmeta --extern cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-d03779535a7603fb.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-ac2484e2aa4c956d.rmeta --extern void=/opt/rustwide/target/debug/deps/libvoid-1690fd8e51023975.rmeta --cap-lints allow` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] The following warnings were emitted during compilation:
[INFO] [stderr] 
[INFO] [stderr] warning: Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
[INFO] [stderr] warning: Pre-built library not found.  Falling back to from-source build
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ffba80f9959c5cad24c46f5ce0f50525f7839a0032f93e193d1becb0a7c2a221", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffba80f9959c5cad24c46f5ce0f50525f7839a0032f93e193d1becb0a7c2a221", kill_on_drop: false }`
[INFO] [stdout] ffba80f9959c5cad24c46f5ce0f50525f7839a0032f93e193d1becb0a7c2a221