[INFO] fetching crate shell-hooks 0.1.2...
[INFO] documenting shell-hooks-0.1.2 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate shell-hooks 0.1.2 into /workspace/builds/worker-31/source
[INFO] validating manifest of crates.io crate shell-hooks 0.1.2 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate shell-hooks 0.1.2
[INFO] finished tweaking crates.io crate shell-hooks 0.1.2
[INFO] tweaked toml for crates.io crate shell-hooks 0.1.2 written to /workspace/builds/worker-31/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6ecb8735d1129d589d00936c233478bc1496b9de7c4390f9c89bcc783eb77ce7
[INFO] running `Command { std: "docker" "start" "-a" "6ecb8735d1129d589d00936c233478bc1496b9de7c4390f9c89bcc783eb77ce7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ecb8735d1129d589d00936c233478bc1496b9de7c4390f9c89bcc783eb77ce7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ecb8735d1129d589d00936c233478bc1496b9de7c4390f9c89bcc783eb77ce7", kill_on_drop: false }`
[INFO] [stdout] 6ecb8735d1129d589d00936c233478bc1496b9de7c4390f9c89bcc783eb77ce7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3a948f6e676dac39a0f589b109c844217a35e5ab4b3580c54ba8678f8e0f937
[INFO] running `Command { std: "docker" "start" "-a" "b3a948f6e676dac39a0f589b109c844217a35e5ab4b3580c54ba8678f8e0f937", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]  Documenting shell-hooks v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/bin/shell-hooks.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(vec_remove_item)]
[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 `shell-hooks`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name shell_hooks src/bin/shell-hooks.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern dirs=/opt/rustwide/target/debug/deps/libdirs-364fb0c860d0792f.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-34f3b748d9af774b.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-6a5809dcce96c926.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-a66a1fdf9c467eb8.so --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-f003316bb3748610.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-dc0a92f3574d8630.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-209acec34e8a5672.rmeta --cap-lints=warn --crate-version 0.1.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "b3a948f6e676dac39a0f589b109c844217a35e5ab4b3580c54ba8678f8e0f937", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3a948f6e676dac39a0f589b109c844217a35e5ab4b3580c54ba8678f8e0f937", kill_on_drop: false }`
[INFO] [stdout] b3a948f6e676dac39a0f589b109c844217a35e5ab4b3580c54ba8678f8e0f937
