[INFO] fetching crate white-balance 0.1.0...
[INFO] documenting white-balance-0.1.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate white-balance 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate white-balance 0.1.0 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 crates.io crate white-balance 0.1.0
[INFO] finished tweaking crates.io crate white-balance 0.1.0
[INFO] tweaked toml for crates.io crate white-balance 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 475bb427557e1e7b2ca2ef633477160273977206e2aaea7bfeac90eeab30bf48
[INFO] running `Command { std: "docker" "start" "-a" "475bb427557e1e7b2ca2ef633477160273977206e2aaea7bfeac90eeab30bf48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "475bb427557e1e7b2ca2ef633477160273977206e2aaea7bfeac90eeab30bf48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "475bb427557e1e7b2ca2ef633477160273977206e2aaea7bfeac90eeab30bf48", kill_on_drop: false }`
[INFO] [stdout] 475bb427557e1e7b2ca2ef633477160273977206e2aaea7bfeac90eeab30bf48
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 7fbbbba6c4ba5a446ae27d4333ab6f409285c804c35f4f35929076ed9fc2b0ee
[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" "7fbbbba6c4ba5a446ae27d4333ab6f409285c804c35f4f35929076ed9fc2b0ee", kill_on_drop: false }`
[INFO] [stderr]     Checking nalgebra v0.10.1
[INFO] [stderr]  Documenting white-balance v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(rand)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `white-balance`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name white_balance 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 clap=/opt/rustwide/target/debug/deps/libclap-d8de5d56e70a343c.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-18ce9a4e18ce4156.rmeta --extern nalgebra=/opt/rustwide/target/debug/deps/libnalgebra-1c6e44f15feb9855.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-76c2f19b1103e931.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-996ecac5420b3288.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-c42c7071001c27f2.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "7fbbbba6c4ba5a446ae27d4333ab6f409285c804c35f4f35929076ed9fc2b0ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fbbbba6c4ba5a446ae27d4333ab6f409285c804c35f4f35929076ed9fc2b0ee", kill_on_drop: false }`
[INFO] [stdout] 7fbbbba6c4ba5a446ae27d4333ab6f409285c804c35f4f35929076ed9fc2b0ee