[INFO] cloning repository https://github.com/kognise/arpchat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kognise/arpchat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkognise%2Farpchat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkognise%2Farpchat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4b05ce1f5deb0e83a76d93d540463cb45ca00711
[INFO] documenting kognise/arpchat against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkognise%2Farpchat" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kognise/arpchat on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-15/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/kognise/arpchat
[INFO] finished tweaking git repo https://github.com/kognise/arpchat
[INFO] tweaked toml for git repo https://github.com/kognise/arpchat written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/kognise/arpchat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pnet_datalink v0.29.0
[INFO] [stderr]   Downloaded enum-map v2.0.3
[INFO] [stderr]   Downloaded pnet_macros v0.29.0
[INFO] [stderr]   Downloaded pnet_sys v0.29.0
[INFO] [stderr]   Downloaded smaz v0.1.0
[INFO] [stderr]   Downloaded pnet v0.29.0
[INFO] [stderr]   Downloaded pnet_transport v0.29.0
[INFO] [stderr]   Downloaded pnet_macros_support v0.29.0
[INFO] [stderr]   Downloaded pnet_packet v0.29.0
[INFO] [stderr]   Downloaded pnet_base v0.29.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 039885d621f19ed5cd2f4f395e4a1839741d040878aa6f11aa16eded93605f42
[INFO] running `Command { std: "docker" "start" "-a" "039885d621f19ed5cd2f4f395e4a1839741d040878aa6f11aa16eded93605f42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "039885d621f19ed5cd2f4f395e4a1839741d040878aa6f11aa16eded93605f42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "039885d621f19ed5cd2f4f395e4a1839741d040878aa6f11aa16eded93605f42", kill_on_drop: false }`
[INFO] [stdout] 039885d621f19ed5cd2f4f395e4a1839741d040878aa6f11aa16eded93605f42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bdf6d2a8e9d5e85bcbff6090053cde7358064000e5781615b3192654acc520ce
[INFO] running `Command { std: "docker" "start" "-a" "bdf6d2a8e9d5e85bcbff6090053cde7358064000e5781615b3192654acc520ce", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]     Checking pnet_base v0.29.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling signal-hook v0.3.13
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]     Checking num_threads v0.1.5
[INFO] [stderr]     Checking xi-unicode v0.3.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking unicode-segmentation v1.9.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]    Compiling pnet v0.29.0
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking smaz v0.1.0
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking lock_api v0.4.6
[INFO] [stderr]     Checking pnet_macros_support v0.29.0
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking crossbeam-channel v0.5.4
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking pnet_sys v0.29.0
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking time v0.3.7
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking gethostname v0.2.3
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking directories v4.0.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking signal-hook-mio v0.2.1
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking crossterm v0.22.1
[INFO] [stderr]    Compiling regex v1.5.5
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]    Compiling darling_core v0.13.1
[INFO] [stderr]    Compiling pnet_macros v0.29.0
[INFO] [stderr]    Compiling enum-map-derive v0.8.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling darling_macro v0.13.1
[INFO] [stderr]     Checking enum-map v2.0.3
[INFO] [stderr]    Compiling darling v0.13.1
[INFO] [stderr]     Checking pnet_packet v0.29.0
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]    Compiling enumset_derive v0.5.5
[INFO] [stderr]     Checking enumset v1.0.8
[INFO] [stderr]     Checking ipnetwork v0.18.0
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking pnet_datalink v0.29.0
[INFO] [stderr]     Checking pnet_transport v0.29.0
[INFO] [stderr]     Checking cursive_core v0.3.1
[INFO] [stderr]     Checking cursive v0.17.0
[INFO] [stderr]  Documenting arpchat v1.0.0 (/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(try_blocks)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(derive_default_enum)]
[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] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `arpchat`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name arpchat src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=5352e4a87482c0ad -L dependency=/opt/rustwide/target/debug/deps --extern crossbeam_channel=/opt/rustwide/target/debug/deps/libcrossbeam_channel-0828918ca0bde37b.rmeta --extern cursive=/opt/rustwide/target/debug/deps/libcursive-9121c9915337bd2e.rmeta --extern directories=/opt/rustwide/target/debug/deps/libdirectories-80feeeb1a5f9a59f.rmeta --extern gethostname=/opt/rustwide/target/debug/deps/libgethostname-51e2d9c742dbae80.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-e14ab7d5dc83d37b.rmeta --extern pnet=/opt/rustwide/target/debug/deps/libpnet-e65f78bcd0f49652.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-2825e5990bff94f7.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-dc95bbc293d82b85.rmeta --extern smaz=/opt/rustwide/target/debug/deps/libsmaz-68ee2ef47ba27fb2.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-24762c1138f6529b.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-f11475de003c70de.rmeta --cap-lints=warn --crate-version 1.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "bdf6d2a8e9d5e85bcbff6090053cde7358064000e5781615b3192654acc520ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdf6d2a8e9d5e85bcbff6090053cde7358064000e5781615b3192654acc520ce", kill_on_drop: false }`
[INFO] [stdout] bdf6d2a8e9d5e85bcbff6090053cde7358064000e5781615b3192654acc520ce