[INFO] cloning repository https://github.com/Big-B/n-body
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Big-B/n-body" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBig-B%2Fn-body", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBig-B%2Fn-body'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 978cb4014e11323f5b54868097ae2345ce3eefcb
[INFO] documenting Big-B/n-body 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%2FBig-B%2Fn-body" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Big-B/n-body 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/Big-B/n-body
[INFO] finished tweaking git repo https://github.com/Big-B/n-body
[INFO] tweaked toml for git repo https://github.com/Big-B/n-body written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/Big-B/n-body 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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] a1f0d5cc238805be0e4ddedef28e1e1c20d2bc977a771e08f2c6ac12a576f231
[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" "a1f0d5cc238805be0e4ddedef28e1e1c20d2bc977a771e08f2c6ac12a576f231", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1f0d5cc238805be0e4ddedef28e1e1c20d2bc977a771e08f2c6ac12a576f231", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1f0d5cc238805be0e4ddedef28e1e1c20d2bc977a771e08f2c6ac12a576f231", kill_on_drop: false }`
[INFO] [stdout] a1f0d5cc238805be0e4ddedef28e1e1c20d2bc977a771e08f2c6ac12a576f231
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 2dbd23bef8d73ad451ab050af73559167177c74ff34a03103d18dfe9aa1c6e25
[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" "2dbd23bef8d73ad451ab050af73559167177c74ff34a03103d18dfe9aa1c6e25", 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]     Checking serde_json v1.0.47
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking openssl-sys v0.9.54
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking mime_guess v2.0.1
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking openssl v0.10.28
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking aho-corasick v0.7.8
[INFO] [stderr]     Checking tokio v0.2.11
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]     Checking h2 v0.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[INFO] [stderr]     Checking pin-project v0.4.8
[INFO] [stderr]     Checking hyper v0.13.2
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking reqwest v0.10.1
[INFO] [stderr]    Compiling markup5ever v0.8.1
[INFO] [stderr]     Checking html5ever v0.23.0
[INFO] [stderr]     Checking select v0.4.3
[INFO] [stderr]  Documenting n-body v0.3.0 (/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: 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 `n-body`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name n_body 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-e6baa1efdda11cdd.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-db88f49d9e5662e7.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-1c7f4aad53d2fdaa.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-89617f04783bca84.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-2c672483caac5196.rmeta --extern select=/opt/rustwide/target/debug/deps/libselect-014ec6cdb8e722e5.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-92e6041116e22f27.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-16019b56d7d7616d.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-a2acdaae529095b9.rmeta --cap-lints=warn --crate-version 0.3.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "2dbd23bef8d73ad451ab050af73559167177c74ff34a03103d18dfe9aa1c6e25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dbd23bef8d73ad451ab050af73559167177c74ff34a03103d18dfe9aa1c6e25", kill_on_drop: false }`
[INFO] [stdout] 2dbd23bef8d73ad451ab050af73559167177c74ff34a03103d18dfe9aa1c6e25