[INFO] fetching crate xtor 0.9.0...
[INFO] documenting xtor-0.9.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate xtor 0.9.0 into /workspace/builds/worker-25/source
[INFO] validating manifest of crates.io crate xtor 0.9.0 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] removed /workspace/builds/worker-25/source/rust-toolchain
[INFO] started tweaking crates.io crate xtor 0.9.0
[INFO] finished tweaking crates.io crate xtor 0.9.0
[INFO] tweaked toml for crates.io crate xtor 0.9.0 written to /workspace/builds/worker-25/source/Cargo.toml
[INFO] crate crates.io crate xtor 0.9.0 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] 8961f10fd31c24d7bc57ce6e6dc29e779b959fb0e3c15f2b099b57cbafc39c31
[INFO] running `Command { std: "docker" "start" "-a" "8961f10fd31c24d7bc57ce6e6dc29e779b959fb0e3c15f2b099b57cbafc39c31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8961f10fd31c24d7bc57ce6e6dc29e779b959fb0e3c15f2b099b57cbafc39c31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8961f10fd31c24d7bc57ce6e6dc29e779b959fb0e3c15f2b099b57cbafc39c31", kill_on_drop: false }`
[INFO] [stdout] 8961f10fd31c24d7bc57ce6e6dc29e779b959fb0e3c15f2b099b57cbafc39c31
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] a56415a077c27cb64605bc474b1826a091ab5492ad7ea6ec873648ac03fc573f
[INFO] running `Command { std: "docker" "start" "-a" "a56415a077c27cb64605bc474b1826a091ab5492ad7ea6ec873648ac03fc573f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling libc v0.2.124
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling parking_lot_core v0.9.2
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]     Checking pin-project-lite v0.2.8
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]    Compiling async-trait v0.1.53
[INFO] [stderr]    Compiling anyhow v1.0.57
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking mio v0.8.2
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking parking_lot v0.12.0
[INFO] [stderr]     Checking dashmap v5.2.0
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling xtor_derive v0.9.0
[INFO] [stderr]     Checking tokio v1.17.0
[INFO] [stderr]     Checking futures-executor v0.3.21
[INFO] [stderr]     Checking futures v0.3.21
[INFO] [stderr]  Documenting xtor v0.9.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | #![feature(type_name_of_val)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `xtor`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name xtor src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=1fd51e0bd43b55c4 -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-0657bc08aa8032ee.rmeta --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-eeb2432808f21b15.so --extern dashmap=/opt/rustwide/target/debug/deps/libdashmap-0a8e654229a972db.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-00911a03181c78eb.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-701e134f05ff346a.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-d5c1de0f4ebdfb66.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-58342ed793a775ea.rmeta --extern xtor_derive=/opt/rustwide/target/debug/deps/libxtor_derive-c613d8014c6d8ce9.so --cap-lints=warn --crate-version 0.9.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "a56415a077c27cb64605bc474b1826a091ab5492ad7ea6ec873648ac03fc573f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a56415a077c27cb64605bc474b1826a091ab5492ad7ea6ec873648ac03fc573f", kill_on_drop: false }`
[INFO] [stdout] a56415a077c27cb64605bc474b1826a091ab5492ad7ea6ec873648ac03fc573f