[INFO] cloning repository https://github.com/PlasmaPower/intersections
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PlasmaPower/intersections" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPlasmaPower%2Fintersections", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPlasmaPower%2Fintersections'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d3a2e27b3c411c228e41e8f9626c9f629efbdf1a
[INFO] documenting PlasmaPower/intersections 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%2FPlasmaPower%2Fintersections" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PlasmaPower/intersections 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/PlasmaPower/intersections
[INFO] finished tweaking git repo https://github.com/PlasmaPower/intersections
[INFO] tweaked toml for git repo https://github.com/PlasmaPower/intersections written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/PlasmaPower/intersections 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] error: the lock file /workspace/builds/worker-2/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded typed-arena v1.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 1c5c80027b4f150fe70ba8cf42b82eb8478ebee73e6efdf7b6a3da0da26c2e49
[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" "1c5c80027b4f150fe70ba8cf42b82eb8478ebee73e6efdf7b6a3da0da26c2e49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c5c80027b4f150fe70ba8cf42b82eb8478ebee73e6efdf7b6a3da0da26c2e49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c5c80027b4f150fe70ba8cf42b82eb8478ebee73e6efdf7b6a3da0da26c2e49", kill_on_drop: false }`
[INFO] [stdout] 1c5c80027b4f150fe70ba8cf42b82eb8478ebee73e6efdf7b6a3da0da26c2e49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 53b48bb61bbb7520b9367d42868206d33400ec4d65b5f21b08891c3dad3e09b1
[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" "53b48bb61bbb7520b9367d42868206d33400ec4d65b5f21b08891c3dad3e09b1", kill_on_drop: false }`
[INFO] [stderr]     Checking jobsteal v0.5.1
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking twox-hash v1.5.0
[INFO] [stderr]  Documenting gene-seq-intersections v0.3.1 (/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(integer_atomics)]
[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 `gene-seq-intersections`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name intersections 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 clap=/opt/rustwide/target/debug/deps/libclap-1c9c629b2fe91003.rmeta --extern csv=/opt/rustwide/target/debug/deps/libcsv-8a7d3dcb393efd76.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-b10f69453a8e09d7.rmeta --extern fnv=/opt/rustwide/target/debug/deps/libfnv-0ff73feb7e2c43f7.rmeta --extern jobsteal=/opt/rustwide/target/debug/deps/libjobsteal-052e91477dd20810.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-39376325fae1b39f.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-ec5e695d7e4b5284.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-e14ca5de376ec3cc.so --extern twox_hash=/opt/rustwide/target/debug/deps/libtwox_hash-051a30e25cc19fb3.rmeta --extern typed_arena=/opt/rustwide/target/debug/deps/libtyped_arena-e90670943b6933e1.rmeta --cap-lints=warn --crate-version 0.3.1` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "53b48bb61bbb7520b9367d42868206d33400ec4d65b5f21b08891c3dad3e09b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53b48bb61bbb7520b9367d42868206d33400ec4d65b5f21b08891c3dad3e09b1", kill_on_drop: false }`
[INFO] [stdout] 53b48bb61bbb7520b9367d42868206d33400ec4d65b5f21b08891c3dad3e09b1