[INFO] fetching crate paxakos 0.11.0...
[INFO] documenting paxakos-0.11.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate paxakos 0.11.0 into /workspace/builds/worker-32/source
[INFO] validating manifest of crates.io crate paxakos 0.11.0 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 crates.io crate paxakos 0.11.0
[INFO] finished tweaking crates.io crate paxakos 0.11.0
[INFO] tweaked toml for crates.io crate paxakos 0.11.0 written to /workspace/builds/worker-32/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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] [stdout] c0c10a874b72ab49d4a528f32220ef1d68b0aa768dff1a13631fa9e7b519eddf
[INFO] running `Command { std: "docker" "start" "-a" "c0c10a874b72ab49d4a528f32220ef1d68b0aa768dff1a13631fa9e7b519eddf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0c10a874b72ab49d4a528f32220ef1d68b0aa768dff1a13631fa9e7b519eddf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0c10a874b72ab49d4a528f32220ef1d68b0aa768dff1a13631fa9e7b519eddf", kill_on_drop: false }`
[INFO] [stdout] c0c10a874b72ab49d4a528f32220ef1d68b0aa768dff1a13631fa9e7b519eddf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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] [stdout] 50831af02eeb4c37b8f76f680360fca6e229d300471adb842dadedec3b86218d
[INFO] running `Command { std: "docker" "start" "-a" "50831af02eeb4c37b8f76f680360fca6e229d300471adb842dadedec3b86218d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking tracing-core v0.1.26
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling pin-project-internal v1.0.10
[INFO] [stderr]    Compiling tracing-attributes v0.1.21
[INFO] [stderr]     Checking pin-project v1.0.10
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking tracing v0.1.34
[INFO] [stderr]     Checking futures-executor v0.3.21
[INFO] [stderr]     Checking futures v0.3.21
[INFO] [stderr]  Documenting paxakos v0.11.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:397:1
[INFO] [stdout]     |
[INFO] [stdout] 397 | #![feature(generic_associated_types)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:399:1
[INFO] [stdout]     |
[INFO] [stdout] 399 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:401:1
[INFO] [stdout]     |
[INFO] [stdout] 401 | #![feature(let_chains)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 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 `paxakos`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name paxakos src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e40b443f7b5509cd -L dependency=/opt/rustwide/target/debug/deps --extern futures=/opt/rustwide/target/debug/deps/libfutures-cf0b7edb6cd3ec8d.rmeta --extern futures_timer=/opt/rustwide/target/debug/deps/libfutures_timer-917763803736739d.rmeta --extern instant=/opt/rustwide/target/debug/deps/libinstant-8d49ff0e918a15fc.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-f68596f2b56d8fce.rmeta --extern pin_project=/opt/rustwide/target/debug/deps/libpin_project-c85c6b70535153b4.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-7861a871ee16da09.rmeta --extern smallvec=/opt/rustwide/target/debug/deps/libsmallvec-ff6006ac5a7457f8.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-38257b06d8bdf695.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-f6751c23a35b415c.rmeta --cap-lints=warn --crate-version 0.11.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "50831af02eeb4c37b8f76f680360fca6e229d300471adb842dadedec3b86218d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50831af02eeb4c37b8f76f680360fca6e229d300471adb842dadedec3b86218d", kill_on_drop: false }`
[INFO] [stdout] 50831af02eeb4c37b8f76f680360fca6e229d300471adb842dadedec3b86218d