[INFO] cloning repository https://github.com/styladev/lfu-fast
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/styladev/lfu-fast" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstyladev%2Flfu-fast", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstyladev%2Flfu-fast'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a7191c8754ed065c273601fb60ab5f3b2d1b2b4
[INFO] documenting styladev/lfu-fast against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstyladev%2Flfu-fast" "/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/styladev/lfu-fast on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/styladev/lfu-fast
[INFO] finished tweaking git repo https://github.com/styladev/lfu-fast
[INFO] tweaked toml for git repo https://github.com/styladev/lfu-fast written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/styladev/lfu-fast already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", 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] 5edda6bba786a2105d6d6f1c827b5ab118ab5996c97f9f1a15013e50186295ac
[INFO] running `Command { std: "docker" "start" "-a" "5edda6bba786a2105d6d6f1c827b5ab118ab5996c97f9f1a15013e50186295ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5edda6bba786a2105d6d6f1c827b5ab118ab5996c97f9f1a15013e50186295ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5edda6bba786a2105d6d6f1c827b5ab118ab5996c97f9f1a15013e50186295ac", kill_on_drop: false }`
[INFO] [stdout] 5edda6bba786a2105d6d6f1c827b5ab118ab5996c97f9f1a15013e50186295ac
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "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] 4fdb050e27436f3b12e81c60a42f3816678f79117462c618479d991d503ba677
[INFO] running `Command { std: "docker" "start" "-a" "4fdb050e27436f3b12e81c60a42f3816678f79117462c618479d991d503ba677", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.74
[INFO] [stderr]    Compiling bumpalo v3.2.0
[INFO] [stderr]    Compiling wee_alloc v0.4.5
[INFO] [stderr]    Compiling wasm-bindgen v0.2.74
[INFO] [stderr]     Checking memory_units v0.4.0
[INFO] [stderr]    Compiling ahash v0.7.4
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.74
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.74
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.74
[INFO] [stderr]  Documenting lfu v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(core_intrinsics, lang_items)]
[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 `lfu`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type cdylib --crate-type rlib --crate-name lfu src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e3a09edd2f3bec43 -L dependency=/opt/rustwide/target/debug/deps --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-c837575da691170d.rmeta --extern wasm_bindgen=/opt/rustwide/target/debug/deps/libwasm_bindgen-45987f3855ae937d.rmeta --extern wee_alloc=/opt/rustwide/target/debug/deps/libwee_alloc-1486153792b68b41.rmeta --cap-lints=warn --crate-version 0.2.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "4fdb050e27436f3b12e81c60a42f3816678f79117462c618479d991d503ba677", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fdb050e27436f3b12e81c60a42f3816678f79117462c618479d991d503ba677", kill_on_drop: false }`
[INFO] [stdout] 4fdb050e27436f3b12e81c60a42f3816678f79117462c618479d991d503ba677