[INFO] fetching crate reactor 0.1.4...
[INFO] documenting reactor-0.1.4 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate reactor 0.1.4 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate reactor 0.1.4 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 crates.io crate reactor 0.1.4
[INFO] finished tweaking crates.io crate reactor 0.1.4
[INFO] tweaked toml for crates.io crate reactor 0.1.4 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 576781f26e693d1a329b10d760b007ddceb29305807e6ef3e0210504055af823
[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" "576781f26e693d1a329b10d760b007ddceb29305807e6ef3e0210504055af823", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "576781f26e693d1a329b10d760b007ddceb29305807e6ef3e0210504055af823", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "576781f26e693d1a329b10d760b007ddceb29305807e6ef3e0210504055af823", kill_on_drop: false }`
[INFO] [stdout] 576781f26e693d1a329b10d760b007ddceb29305807e6ef3e0210504055af823
[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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", 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] af2a09d9703425df12d220467c53923659f63c05c282abc2bab09167bf6cd0e1
[INFO] running `Command { std: "docker" "start" "-a" "af2a09d9703425df12d220467c53923659f63c05c282abc2bab09167bf6cd0e1", kill_on_drop: false }`
[INFO] [stderr]     Checking bitflags v0.1.1
[INFO] [stderr]     Checking bytes v0.2.11
[INFO] [stderr]    Compiling time v0.2.17
[INFO] [stderr]     Checking winapi v0.1.23
[INFO] [stderr]     Checking tendril v0.1.6
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]     Checking nix v0.3.10
[INFO] [stderr]     Checking mio v0.4.4
[INFO] [stderr]     Checking time-macros v0.1.0
[INFO] [stderr]  Documenting reactor v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::net::lookup_host`
[INFO] [stdout]  --> src/reactor_ctrl.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 |                lookup_host,
[INFO] [stdout]   |                ^^^^^^^^^^^ no `lookup_host` in `net`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:176:1
[INFO] [stdout]     |
[INFO] [stdout] 176 | #![feature(lookup_host)]
[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] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `reactor`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name reactor 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 log=/opt/rustwide/target/debug/deps/liblog-958bf2a074a4960f.rmeta --extern mio=/opt/rustwide/target/debug/deps/libmio-487cb62df1bd9067.rmeta --extern tendril=/opt/rustwide/target/debug/deps/libtendril-f75690c0ec1d8f7c.rmeta --extern time=/opt/rustwide/target/debug/deps/libtime-3d06e942690f01b7.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "af2a09d9703425df12d220467c53923659f63c05c282abc2bab09167bf6cd0e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af2a09d9703425df12d220467c53923659f63c05c282abc2bab09167bf6cd0e1", kill_on_drop: false }`
[INFO] [stdout] af2a09d9703425df12d220467c53923659f63c05c282abc2bab09167bf6cd0e1