[INFO] cloning repository https://github.com/dat2/csv-aggregator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dat2/csv-aggregator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdat2%2Fcsv-aggregator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdat2%2Fcsv-aggregator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ff00876adf350ccbd5bf04b02e558347a7f0971f
[INFO] documenting dat2/csv-aggregator 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%2Fdat2%2Fcsv-aggregator" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dat2/csv-aggregator 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/dat2/csv-aggregator
[INFO] finished tweaking git repo https://github.com/dat2/csv-aggregator
[INFO] tweaked toml for git repo https://github.com/dat2/csv-aggregator written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/dat2/csv-aggregator 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded float-cmp v0.2.5
[INFO] [stderr]   Downloaded csv-core v0.1.3
[INFO] [stderr]   Downloaded combine v3.0.0-alpha.4
[INFO] [stderr]   Downloaded csv v1.0.0-beta.5
[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" "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] 9c379b680f7ee98845e4f758dc6f89693fc0538da5d322d09ccf8c299fc36cf1
[INFO] running `Command { std: "docker" "start" "-a" "9c379b680f7ee98845e4f758dc6f89693fc0538da5d322d09ccf8c299fc36cf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9c379b680f7ee98845e4f758dc6f89693fc0538da5d322d09ccf8c299fc36cf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c379b680f7ee98845e4f758dc6f89693fc0538da5d322d09ccf8c299fc36cf1", kill_on_drop: false }`
[INFO] [stdout] 9c379b680f7ee98845e4f758dc6f89693fc0538da5d322d09ccf8c299fc36cf1
[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" "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] 754546e1c8cd2b8a25494bcd5b6792d14b7e787fd84a35cb289f8fdfd792ba5c
[INFO] running `Command { std: "docker" "start" "-a" "754546e1c8cd2b8a25494bcd5b6792d14b7e787fd84a35cb289f8fdfd792ba5c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking libc v0.2.34
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking num-traits v0.1.41
[INFO] [stderr]    Compiling cc v1.0.3
[INFO] [stderr]     Checking serde v1.0.24
[INFO] [stderr]     Checking rustc-demangle v0.1.5
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking linked-hash-map v0.5.0
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking ascii v0.7.1
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking ansi_term v0.10.2
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking yaml-rust v0.4.0
[INFO] [stderr]     Checking combine v3.0.0-alpha.4
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking atty v0.2.3
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]     Checking clap v2.29.0
[INFO] [stderr]     Checking csv-core v0.1.3
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking num-iter v0.1.34
[INFO] [stderr]     Checking num v0.1.41
[INFO] [stderr]     Checking float-cmp v0.2.5
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling serde_derive_internals v0.18.0
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.24
[INFO] [stderr]     Checking csv v1.0.0-beta.5
[INFO] [stderr]     Checking chrono v0.4.0
[INFO] [stderr]     Checking serde_yaml v0.7.3
[INFO] [stderr]     Checking backtrace v0.3.4
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]  Documenting csv-aggregator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(conservative_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `csv-aggregator`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name csv_aggregator src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-9a9999290eeeeb8c.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-cae1a3ff8798ae05.rmeta --extern combine=/opt/rustwide/target/debug/deps/libcombine-59e60e619efa4d40.rmeta --extern csv=/opt/rustwide/target/debug/deps/libcsv-848880770cefcc79.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-d140b5de3aeec233.rmeta --extern float_cmp=/opt/rustwide/target/debug/deps/libfloat_cmp-d14aaf6849e5f979.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-61b3d0371d1ed0dd.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-0b29daba8c373f35.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-54f62b4a447360a5.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-6077eb5bf7499d3e.so --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-b61ff2f1e4646c02.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "754546e1c8cd2b8a25494bcd5b6792d14b7e787fd84a35cb289f8fdfd792ba5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "754546e1c8cd2b8a25494bcd5b6792d14b7e787fd84a35cb289f8fdfd792ba5c", kill_on_drop: false }`
[INFO] [stdout] 754546e1c8cd2b8a25494bcd5b6792d14b7e787fd84a35cb289f8fdfd792ba5c
