[INFO] cloning repository https://github.com/Peruz/rust_read_csv
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Peruz/rust_read_csv" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPeruz%2Frust_read_csv", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPeruz%2Frust_read_csv'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 42ef0d08cb63841774994e0a0a67b8acb4aa7c34
[INFO] documenting Peruz/rust_read_csv against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPeruz%2Frust_read_csv" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Peruz/rust_read_csv on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Peruz/rust_read_csv
[INFO] finished tweaking git repo https://github.com/Peruz/rust_read_csv
[INFO] tweaked toml for git repo https://github.com/Peruz/rust_read_csv written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Peruz/rust_read_csv already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/clap-rs/clap.git`
[INFO] [stderr]     Updating git repository `https://github.com/BurntSushi/rust-csv.git`
[INFO] [stderr]     Updating git repository `https://github.com/rust-ndarray/ndarray.git`
[INFO] [stderr]     Updating git repository `https://github.com/38/plotters.git`
[INFO] [stderr]     Updating git submodule `https://github.com/38/plotters-doc-data`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f7a90ad113fb44f8e0044ab508f04af3c84d808f1026d533ab83e089c85769b4
[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" "f7a90ad113fb44f8e0044ab508f04af3c84d808f1026d533ab83e089c85769b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7a90ad113fb44f8e0044ab508f04af3c84d808f1026d533ab83e089c85769b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7a90ad113fb44f8e0044ab508f04af3c84d808f1026d533ab83e089c85769b4", kill_on_drop: false }`
[INFO] [stdout] f7a90ad113fb44f8e0044ab508f04af3c84d808f1026d533ab83e089c85769b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 012f71289ca1a7b23959e882fe8c56e9a79aff33184b09effa958d427679092e
[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" "012f71289ca1a7b23959e882fe8c56e9a79aff33184b09effa958d427679092e", kill_on_drop: false }`
[INFO] [stderr]    Compiling palette v0.5.0
[INFO] [stderr]    Compiling ndarray v0.13.1 (https://github.com/rust-ndarray/ndarray.git#f69248e9)
[INFO] [stderr]     Checking blas-src v0.2.1
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling servo-freetype-sys v4.0.5
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]     Checking csv-core v0.1.10 (https://github.com/BurntSushi/rust-csv.git#f0f53a49)
[INFO] [stderr]     Checking deflate v0.8.4
[INFO] [stderr]     Checking jpeg-decoder v0.1.19
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking cblas-sys v0.1.4
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]     Checking rayon v1.3.1
[INFO] [stderr]     Checking rusttype v0.8.3
[INFO] [stderr]     Checking png v0.16.5
[INFO] [stderr]    Compiling servo-fontconfig-sys v4.0.9
[INFO] [stderr]     Checking freetype v0.4.1
[INFO] [stderr]     Checking num-iter v0.1.41
[INFO] [stderr]     Checking num-rational v0.3.0
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking servo-fontconfig v0.4.0
[INFO] [stderr]     Checking font-kit v0.7.1
[INFO] [stderr]     Checking image v0.23.6
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.3
[INFO] [stderr]    Compiling palette_derive v0.5.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.3
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.1 (https://github.com/clap-rs/clap.git#ca27d50a)
[INFO] [stderr]     Checking plotters v0.2.15 (https://github.com/38/plotters.git#dee7727f)
[INFO] [stderr]     Checking clap v3.0.0-beta.1 (https://github.com/clap-rs/clap.git#ca27d50a)
[INFO] [stderr]     Checking serde v1.0.106
[INFO] [stderr]     Checking bstr v0.2.12
[INFO] [stderr]     Checking csv v1.1.3 (https://github.com/BurntSushi/rust-csv.git#f0f53a49)
[INFO] [stderr]  Documenting csvtutor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[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 `csvtutor`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name csvtutor src/main.rs -o /opt/rustwide/target/doc --cfg 'feature="approx"' --cfg 'feature="blas-src"' --cfg 'feature="cblas-sys"' --cfg 'feature="default"' --cfg 'feature="rayon"' --cfg 'feature="serde"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern approx=/opt/rustwide/target/debug/deps/libapprox-8a93d17c834768ee.rmeta --extern blas_src=/opt/rustwide/target/debug/deps/libblas_src-03dcf8f419ea7e89.rmeta --extern cblas_sys=/opt/rustwide/target/debug/deps/libcblas_sys-2330d2b04c81711e.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-061262e2ac63a28b.rmeta --extern csv=/opt/rustwide/target/debug/deps/libcsv-a27277e3b957d9d5.rmeta --extern ndarray=/opt/rustwide/target/debug/deps/libndarray-e31509b079876116.rmeta --extern plotters=/opt/rustwide/target/debug/deps/libplotters-af1955441f0da4fe.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-9cb204ad06aad66e.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-a6d542aa8ff0fd44.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "012f71289ca1a7b23959e882fe8c56e9a79aff33184b09effa958d427679092e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "012f71289ca1a7b23959e882fe8c56e9a79aff33184b09effa958d427679092e", kill_on_drop: false }`
[INFO] [stdout] 012f71289ca1a7b23959e882fe8c56e9a79aff33184b09effa958d427679092e