[INFO] cloning repository https://github.com/mchaver/digit-recognition
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mchaver/digit-recognition" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmchaver%2Fdigit-recognition", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmchaver%2Fdigit-recognition'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a605df4d31511e5bde035fff17c55835c0e19e3f
[INFO] documenting mchaver/digit-recognition against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmchaver%2Fdigit-recognition" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mchaver/digit-recognition on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mchaver/digit-recognition
[INFO] finished tweaking git repo https://github.com/mchaver/digit-recognition
[INFO] tweaked toml for git repo https://github.com/mchaver/digit-recognition written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/mchaver/digit-recognition already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-derive v0.2.2
[INFO] [stderr]   Downloaded pear_codegen v0.0.17
[INFO] [stderr]   Downloaded rocket_contrib v0.3.12
[INFO] [stderr]   Downloaded rocket_codegen v0.3.12
[INFO] [stderr]   Downloaded gif v0.10.0
[INFO] [stderr]   Downloaded smallvec v0.6.2
[INFO] [stderr]   Downloaded pear v0.0.17
[INFO] [stderr]   Downloaded rocket v0.3.12
[INFO] [stderr]   Downloaded serde_json v1.0.20
[INFO] [stderr]   Downloaded isatty v0.1.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b5f3cdd91658c9d2b37c093d0dc3d8a53ba837888252ef43f0a27c7bf520f41b
[INFO] running `Command { std: "docker" "start" "-a" "b5f3cdd91658c9d2b37c093d0dc3d8a53ba837888252ef43f0a27c7bf520f41b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5f3cdd91658c9d2b37c093d0dc3d8a53ba837888252ef43f0a27c7bf520f41b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5f3cdd91658c9d2b37c093d0dc3d8a53ba837888252ef43f0a27c7bf520f41b", kill_on_drop: false }`
[INFO] [stdout] b5f3cdd91658c9d2b37c093d0dc3d8a53ba837888252ef43f0a27c7bf520f41b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc138e00fff10e527d3096d83d1adc9be779726ccd43d83ed5f88a8a714f9d69
[INFO] running `Command { std: "docker" "start" "-a" "bc138e00fff10e527d3096d83d1adc9be779726ccd43d83ed5f88a8a714f9d69", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cfg-if v0.1.3
[INFO] [stderr]    Compiling libc v0.2.42
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling version_check v0.1.3
[INFO] [stderr]    Compiling nodrop v0.1.12
[INFO] [stderr]    Compiling lazy_static v1.0.1
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling yansi v0.4.0
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]     Checking byteorder v1.2.3
[INFO] [stderr]    Compiling serde v1.0.66
[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]     Checking matches v0.1.6
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]     Checking unicode-normalization v0.1.7
[INFO] [stderr]    Compiling safemem v0.2.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking untrusted v0.5.1
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]     Checking adler32 v1.0.2
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]    Compiling traitobject v0.1.0
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]    Compiling httparse v1.2.4
[INFO] [stderr]     Checking itoa v0.4.1
[INFO] [stderr]     Checking state v0.4.1
[INFO] [stderr]    Compiling pear v0.0.17
[INFO] [stderr]     Checking ordermap v0.2.13
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]     Checking smallvec v0.6.2
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling log v0.4.2
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]    Compiling proc-macro2 v0.4.6
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling isatty v0.1.8
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]     Checking inflate v0.4.2
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr] error: could not compile `serde`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name serde /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.66/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="std"' -C metadata=4f0c8609391f188c -C extra-filename=-4f0c8609391f188c --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints allow --cfg de_boxed_c_str --cfg de_rc_dst --cfg core_duration --cfg integer128 --cfg num_nonzero` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "bc138e00fff10e527d3096d83d1adc9be779726ccd43d83ed5f88a8a714f9d69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc138e00fff10e527d3096d83d1adc9be779726ccd43d83ed5f88a8a714f9d69", kill_on_drop: false }`
[INFO] [stdout] bc138e00fff10e527d3096d83d1adc9be779726ccd43d83ed5f88a8a714f9d69
