[INFO] cloning repository https://github.com/simonjiao/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/simonjiao/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimonjiao%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimonjiao%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ef5f0750c3bf9d3f52a4ad2784314f35b1dbc7f4
[INFO] documenting simonjiao/learning-rust against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimonjiao%2Flearning-rust" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/simonjiao/learning-rust on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/simonjiao/learning-rust
[INFO] finished tweaking git repo https://github.com/simonjiao/learning-rust
[INFO] tweaked toml for git repo https://github.com/simonjiao/learning-rust written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/simonjiao/learning-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de0bd2c3be31684b71862164bb7d15b8bc81e77baa3b0a4f0a5dd20d9f72fdcb
[INFO] running `Command { std: "docker" "start" "-a" "de0bd2c3be31684b71862164bb7d15b8bc81e77baa3b0a4f0a5dd20d9f72fdcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de0bd2c3be31684b71862164bb7d15b8bc81e77baa3b0a4f0a5dd20d9f72fdcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de0bd2c3be31684b71862164bb7d15b8bc81e77baa3b0a4f0a5dd20d9f72fdcb", kill_on_drop: false }`
[INFO] [stdout] de0bd2c3be31684b71862164bb7d15b8bc81e77baa3b0a4f0a5dd20d9f72fdcb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 004aacc2165662681bbd09dfc67d2d3f3b57373bb870281e4b9c5755485f0aaf
[INFO] running `Command { std: "docker" "start" "-a" "004aacc2165662681bbd09dfc67d2d3f3b57373bb870281e4b9c5755485f0aaf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.71
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]     Checking object v0.23.0
[INFO] [stderr]     Checking data-encoding v2.3.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.4
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling backtrace v0.3.58
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]    Compiling libsqlite3-sys v0.22.1
[INFO] [stderr]     Checking addr2line v0.14.1
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking hashlink v0.6.0
[INFO] [stderr]     Checking mio v0.7.11
[INFO] [stderr]     Checking indexmap v1.6.2
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking filetime v0.2.14
[INFO] [stderr]     Checking xattr v0.2.2
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking ring v0.16.20
[INFO] [stderr]     Checking tar v0.4.33
[INFO] [stderr]     Checking webpki v0.21.4
[INFO] [stderr]     Checking sct v0.6.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.4
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking crossbeam-queue v0.3.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking rustls v0.19.1
[INFO] [stderr]     Checking webpki-roots v0.21.1
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking crossbeam v0.8.0
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking syslog v5.0.0
[INFO] [stderr]     Checking tokio-util v0.6.6
[INFO] [stderr]     Checking tokio-rustls v0.22.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking tiff v0.6.1
[INFO] [stderr]     Checking image v0.23.14
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling futures-macro v0.3.14
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]     Checking futures-util v0.3.14
[INFO] [stderr]     Checking pin-project v1.0.7
[INFO] [stderr]     Checking rusqlite v0.25.1
[INFO] [stderr]     Checking h2 v0.3.3
[INFO] [stderr]     Checking serde v1.0.125
[INFO] [stderr]     Checking hyper v0.14.7
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking hyper-rustls v0.22.1
[INFO] [stderr]     Checking reqwest v0.11.3
[INFO] [stderr]     Checking learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not document `learning-rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name learning_rust src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-ed234740686b5bee.rmeta --extern base64=/opt/rustwide/target/debug/deps/libbase64-06135271d248c171.rmeta --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-c759f8d07719039e.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-b55b8e72bfe1c077.rmeta --extern crossbeam=/opt/rustwide/target/debug/deps/libcrossbeam-153209bcdba89fd9.rmeta --extern crossbeam_channel=/opt/rustwide/target/debug/deps/libcrossbeam_channel-c26bacd37c062333.rmeta --extern csv=/opt/rustwide/target/debug/deps/libcsv-83e7ed68296cbb22.rmeta --extern data_encoding=/opt/rustwide/target/debug/deps/libdata_encoding-43b60f30e9bfb9a2.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-ba3a219a6b5ba3fd.rmeta --extern error_chain=/opt/rustwide/target/debug/deps/liberror_chain-90e4d7512ad183f4.rmeta --extern flate2=/opt/rustwide/target/debug/deps/libflate2-a28f8d8fd6e88bda.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-dd005bda8a71734d.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-95e1dd9d37d7df06.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-acd7d23482fe8b54.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f8abb66ffc16068c.rmeta --extern memmap=/opt/rustwide/target/debug/deps/libmemmap-048106159c2f6a35.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-2aa64df936a0c12a.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-7192e3da3150660d.rmeta --extern percent_encoding=/opt/rustwide/target/debug/deps/libpercent_encoding-ede8fd58102f5c41.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-968737d009048a32.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-bfc4426bd33a40d7.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-46bf5b535d6b6b09.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-0095d2cc46684e48.rmeta --extern ring=/opt/rustwide/target/debug/deps/libring-a0a45e3f80269eeb.rmeta --extern rusqlite=/opt/rustwide/target/debug/deps/librusqlite-70777a6ba9947231.rmeta --extern same_file=/opt/rustwide/target/debug/deps/libsame_file-5106f5bd89626bfb.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-97760dee56460dd4.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-03b4ba92504278c8.rmeta --extern syslog=/opt/rustwide/target/debug/deps/libsyslog-425999e5c2f50999.rmeta --extern tar=/opt/rustwide/target/debug/deps/libtar-db38a347827df780.rmeta --extern threadpool=/opt/rustwide/target/debug/deps/libthreadpool-95a8136f57cecbf2.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-dc4bd999aa69be63.rmeta --extern unicode_segmentation=/opt/rustwide/target/debug/deps/libunicode_segmentation-52dc7082e28e3b25.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-e2a5a775ed5a5445.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-c0fe0581f7b315ac.rmeta --cap-lints=warn --crate-version 0.1.0` (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" "004aacc2165662681bbd09dfc67d2d3f3b57373bb870281e4b9c5755485f0aaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "004aacc2165662681bbd09dfc67d2d3f3b57373bb870281e4b9c5755485f0aaf", kill_on_drop: false }`
[INFO] [stdout] 004aacc2165662681bbd09dfc67d2d3f3b57373bb870281e4b9c5755485f0aaf
