[INFO] fetching crate easy-kill-cli 0.1.3...
[INFO] documenting easy-kill-cli-0.1.3 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate easy-kill-cli 0.1.3 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate easy-kill-cli 0.1.3 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 easy-kill-cli 0.1.3
[INFO] finished tweaking crates.io crate easy-kill-cli 0.1.3
[INFO] tweaked toml for crates.io crate easy-kill-cli 0.1.3 written to /workspace/builds/worker-1/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]  Downloading crates ...
[INFO] [stderr]   Downloaded dialoguer v0.1.0
[INFO] [stderr]   Downloaded easy-kill v0.1.0
[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] 49afc9c472e8046768d3f7f11b3e3d0ac517d6d8c090655b7eba84bcb7a56437
[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" "49afc9c472e8046768d3f7f11b3e3d0ac517d6d8c090655b7eba84bcb7a56437", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49afc9c472e8046768d3f7f11b3e3d0ac517d6d8c090655b7eba84bcb7a56437", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49afc9c472e8046768d3f7f11b3e3d0ac517d6d8c090655b7eba84bcb7a56437", kill_on_drop: false }`
[INFO] [stdout] 49afc9c472e8046768d3f7f11b3e3d0ac517d6d8c090655b7eba84bcb7a56437
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5c496b6848694486a73b36bcd30877f5fc2ce07eb57845b1baa02ddf63fe974d
[INFO] running `Command { std: "docker" "start" "-a" "5c496b6848694486a73b36bcd30877f5fc2ce07eb57845b1baa02ddf63fe974d", 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]     Checking easy-kill v0.1.0
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking tempfile v2.2.0
[INFO] [stderr]     Checking console v0.12.0
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking dialoguer v0.1.0
[INFO] [stderr]  Documenting easy-kill-cli v0.1.3 (/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(getpid)]
[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 `easy-kill-cli`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name ekill 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-d8de5d56e70a343c.rmeta --extern console=/opt/rustwide/target/debug/deps/libconsole-04c7a26bb478c137.rmeta --extern dialoguer=/opt/rustwide/target/debug/deps/libdialoguer-e31d39a3b22d4a4f.rmeta --extern easy_kill=/opt/rustwide/target/debug/deps/libeasy_kill-cfc3b291fa44e8a3.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-db88f49d9e5662e7.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-b01e5f49cd1b74e8.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-3ce2051faed97dee.rmeta --cap-lints=warn --crate-version 0.1.3` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "5c496b6848694486a73b36bcd30877f5fc2ce07eb57845b1baa02ddf63fe974d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c496b6848694486a73b36bcd30877f5fc2ce07eb57845b1baa02ddf63fe974d", kill_on_drop: false }`
[INFO] [stdout] 5c496b6848694486a73b36bcd30877f5fc2ce07eb57845b1baa02ddf63fe974d