[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 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdat2%2Fcsv-aggregator" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dat2/csv-aggregator 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/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-12/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" "+1.46.0" "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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 1c2e76dd6deda7c7730295310de894c33e57fde7dcad5332a834304acdd22c3b
[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" "1c2e76dd6deda7c7730295310de894c33e57fde7dcad5332a834304acdd22c3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c2e76dd6deda7c7730295310de894c33e57fde7dcad5332a834304acdd22c3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c2e76dd6deda7c7730295310de894c33e57fde7dcad5332a834304acdd22c3b", kill_on_drop: false }`
[INFO] [stdout] 1c2e76dd6deda7c7730295310de894c33e57fde7dcad5332a834304acdd22c3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stdout] 2875038d5b0d49c6caefc0c3a9c3006bbf3f024019f90956fd4dff8fa8d46150
[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" "2875038d5b0d49c6caefc0c3a9c3006bbf3f024019f90956fd4dff8fa8d46150", kill_on_drop: false }`
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]     Checking yaml-rust v0.4.0
[INFO] [stderr]    Compiling serde_derive_internals v0.18.0
[INFO] [stderr]     Checking combine v3.0.0-alpha.4
[INFO] [stderr]     Checking failure v0.1.1
[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 csv v1.0.0-beta.5
[INFO] [stderr]     Checking num v0.1.41
[INFO] [stderr]     Checking float-cmp v0.2.5
[INFO] [stderr]     Checking serde_yaml v0.7.3
[INFO] [stderr]     Checking chrono v0.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.24
[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]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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-4be8eab45f9a8b15.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-883aac0810c413a1.rmeta --extern combine=/opt/rustwide/target/debug/deps/libcombine-1097e79a6727753e.rmeta --extern csv=/opt/rustwide/target/debug/deps/libcsv-7fef6806fbdf9cca.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-7700e021bbfad22d.rmeta --extern float_cmp=/opt/rustwide/target/debug/deps/libfloat_cmp-b0bcb94ce6d436d8.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-732e50766ae135c1.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-a37c6019fceb6152.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-387900c8509dc1a7.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-147d5b8bca98ab9b.so --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-67eb1f9a47b59b94.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "2875038d5b0d49c6caefc0c3a9c3006bbf3f024019f90956fd4dff8fa8d46150", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2875038d5b0d49c6caefc0c3a9c3006bbf3f024019f90956fd4dff8fa8d46150", kill_on_drop: false }`
[INFO] [stdout] 2875038d5b0d49c6caefc0c3a9c3006bbf3f024019f90956fd4dff8fa8d46150