[INFO] fetching crate openraft 0.6.4...
[INFO] documenting openraft-0.6.4 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate openraft 0.6.4 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate openraft 0.6.4 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] started tweaking crates.io crate openraft 0.6.4
[INFO] finished tweaking crates.io crate openraft 0.6.4
[INFO] tweaked toml for crates.io crate openraft 0.6.4 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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" "+1.61.0" "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 tracing-appender v0.2.2
[INFO] [stderr]   Downloaded async-raft v0.6.1
[INFO] [stderr]   Downloaded memstore v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] b6db5f9fb2cfd3ef0a8c2a7f6080712dfda922e81051ff0158b2a1fd3502e707
[INFO] running `Command { std: "docker" "start" "-a" "b6db5f9fb2cfd3ef0a8c2a7f6080712dfda922e81051ff0158b2a1fd3502e707", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6db5f9fb2cfd3ef0a8c2a7f6080712dfda922e81051ff0158b2a1fd3502e707", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6db5f9fb2cfd3ef0a8c2a7f6080712dfda922e81051ff0158b2a1fd3502e707", kill_on_drop: false }`
[INFO] [stdout] b6db5f9fb2cfd3ef0a8c2a7f6080712dfda922e81051ff0158b2a1fd3502e707
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] d5d367567739663a2703fbc38e353690e0f9ea5b7d0137515812667979e8fe0e
[INFO] running `Command { std: "docker" "start" "-a" "d5d367567739663a2703fbc38e353690e0f9ea5b7d0137515812667979e8fe0e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]    Compiling async-trait v0.1.53
[INFO] [stderr]    Compiling anyhow v1.0.57
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking utf8-width v0.1.6
[INFO] [stderr]     Checking once_cell v1.12.0
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking tracing-core v0.1.26
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking byte-unit v4.0.14
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling pin-project-internal v1.0.10
[INFO] [stderr]    Compiling tracing-attributes v0.1.21
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]     Checking tokio v1.18.2
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking futures-util v0.3.21
[INFO] [stderr]     Checking futures-executor v0.3.21
[INFO] [stderr]     Checking futures v0.3.21
[INFO] [stderr]     Checking pin-project v1.0.10
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking tracing v0.1.34
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]  Documenting openraft v0.6.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(backtrace)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `LICENSE`
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![doc = include_str!("../README.md")]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout]   = note: the link appears in this line:
[INFO] [stdout]           
[INFO] [stdout]           [![License](https://img.shields.io/badge/license-MIT%2FApache--2.0-blue)](LICENSE)
[INFO] [stdout]                                                                                     ^^^^^^^
[INFO] [stdout]   = note: no item named `LICENSE` in scope
[INFO] [stdout]   = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `openraft`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name openraft src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=c2941db145397561 -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-a2ad8fa07e0781ab.rmeta --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-8ebf2e0bc4105a3e.so --extern byte_unit=/opt/rustwide/target/debug/deps/libbyte_unit-60979ffd67a1e1a3.rmeta --extern bytes=/opt/rustwide/target/debug/deps/libbytes-57de1f6d7c9c6f6c.rmeta --extern derive_more=/opt/rustwide/target/debug/deps/libderive_more-2aa3fa03a675ef81.so --extern futures=/opt/rustwide/target/debug/deps/libfutures-7786a5f1328ee00d.rmeta --extern maplit=/opt/rustwide/target/debug/deps/libmaplit-a26423216ebb27ff.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-efb7a43670652d5c.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-311e13e6ee1f9772.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-d43a200b368ef451.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-3e53de7f84d3f50d.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-769a0ee29b67967a.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-8c0e6a5d05296935.rmeta --extern tracing_futures=/opt/rustwide/target/debug/deps/libtracing_futures-8faefec050d60d04.rmeta --cap-lints=warn --crate-version 0.6.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d5d367567739663a2703fbc38e353690e0f9ea5b7d0137515812667979e8fe0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5d367567739663a2703fbc38e353690e0f9ea5b7d0137515812667979e8fe0e", kill_on_drop: false }`
[INFO] [stdout] d5d367567739663a2703fbc38e353690e0f9ea5b7d0137515812667979e8fe0e