[INFO] cloning repository https://github.com/fin-ger/simple-raft-node
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fin-ger/simple-raft-node" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffin-ger%2Fsimple-raft-node", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffin-ger%2Fsimple-raft-node'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0ae32e1719b8164535b855207287b7cd248e1370
[INFO] documenting fin-ger/simple-raft-node 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%2Ffin-ger%2Fsimple-raft-node" "/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/fin-ger/simple-raft-node 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/fin-ger/simple-raft-node
[INFO] finished tweaking git repo https://github.com/fin-ger/simple-raft-node
[INFO] tweaked toml for git repo https://github.com/fin-ger/simple-raft-node written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/fin-ger/simple-raft-node 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] 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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 474281ee07d0869c0db4ead484f668cdd587b85f309c5d63dc0232e474f36688
[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" "474281ee07d0869c0db4ead484f668cdd587b85f309c5d63dc0232e474f36688", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "474281ee07d0869c0db4ead484f668cdd587b85f309c5d63dc0232e474f36688", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "474281ee07d0869c0db4ead484f668cdd587b85f309c5d63dc0232e474f36688", kill_on_drop: false }`
[INFO] [stdout] 474281ee07d0869c0db4ead484f668cdd587b85f309c5d63dc0232e474f36688
[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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1188da7da2f7fc2ccfed3d0e7108aaa145f31726cb7fd37a555f260c37f192fa
[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" "1188da7da2f7fc2ccfed3d0e7108aaa145f31726cb7fd37a555f260c37f192fa", 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]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]    Compiling protobuf v2.8.1
[INFO] [stderr]     Checking async-ready v3.0.0
[INFO] [stderr]     Checking async-datagram v3.0.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking get_if_addrs v0.5.3
[INFO] [stderr]     Checking slog-scope v4.1.2
[INFO] [stderr]     Checking slog-async v2.3.0
[INFO] [stderr]     Checking rmp v0.8.8
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling getset v0.0.7
[INFO] [stderr]     Checking crossbeam v0.7.2
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking slog-stdlog v4.0.0
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking futures-timer v0.3.0
[INFO] [stderr]     Checking juliex v0.3.0-alpha.8
[INFO] [stderr]     Checking runtime-raw v0.3.0-alpha.5
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]     Checking slog-term v2.4.1
[INFO] [stderr]     Checking romio v0.3.0-alpha.10
[INFO] [stderr]     Checking slog-envlogger v2.2.0
[INFO] [stderr]     Checking runtime-native v0.3.0-alpha.6
[INFO] [stderr]    Compiling protobuf-codegen v2.8.1
[INFO] [stderr]    Compiling protobuf-build v0.10.0
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]    Compiling raft-proto v0.6.0-alpha (https://github.com/pingcap/raft-rs#d0acd70a)
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling runtime-attributes v0.3.0-alpha.6
[INFO] [stderr]     Checking runtime v0.3.0-alpha.7
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking raft v0.6.0-alpha (https://github.com/pingcap/raft-rs#d0acd70a)
[INFO] [stderr]     Checking serde v1.0.101
[INFO] [stderr]     Checking rmp-serde v0.14.0
[INFO] [stderr]  Documenting simple-raft-node v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / #![feature(
[INFO] [stdout] 2 | |     vec_remove_item,
[INFO] [stdout] 3 | |     drain_filter,
[INFO] [stdout] 4 | |     trait_alias,
[INFO] [stdout] 5 | |     fn_traits,
[INFO] [stdout] 6 | | )]
[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 `simple-raft-node`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name simple_raft_node 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 crossbeam=/opt/rustwide/target/debug/deps/libcrossbeam-df2264ac427e85dd.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-3c7d4d652efd9714.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-c968d343e3662e5f.rmeta --extern get_if_addrs=/opt/rustwide/target/debug/deps/libget_if_addrs-c6ba029bfea87fa2.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-57a7edc7f441d44c.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f96ba0118540bef9.rmeta --extern protobuf=/opt/rustwide/target/debug/deps/libprotobuf-790217ada3632ca8.rmeta --extern raft=/opt/rustwide/target/debug/deps/libraft-badadb47940df822.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-ef03d8c34c9cc7a6.rmeta --extern rmp_serde=/opt/rustwide/target/debug/deps/librmp_serde-b1b39ba746dcf7af.rmeta --extern runtime=/opt/rustwide/target/debug/deps/libruntime-fdc0f5a4b715bd77.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-1546907d165814d0.rmeta --extern slog=/opt/rustwide/target/debug/deps/libslog-f96788f35f7718ca.rmeta --extern slog_envlogger=/opt/rustwide/target/debug/deps/libslog_envlogger-31d7aba9abc19043.rmeta --extern slog_term=/opt/rustwide/target/debug/deps/libslog_term-855180b9cdb850a9.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "1188da7da2f7fc2ccfed3d0e7108aaa145f31726cb7fd37a555f260c37f192fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1188da7da2f7fc2ccfed3d0e7108aaa145f31726cb7fd37a555f260c37f192fa", kill_on_drop: false }`
[INFO] [stdout] 1188da7da2f7fc2ccfed3d0e7108aaa145f31726cb7fd37a555f260c37f192fa