[INFO] cloning repository https://github.com/puzza007/ksero
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/puzza007/ksero" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpuzza007%2Fksero", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpuzza007%2Fksero'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 72969ef7cdd06019d509668c3728a41ee16c2243
[INFO] documenting puzza007/ksero against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpuzza007%2Fksero" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/puzza007/ksero on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/puzza007/ksero
[INFO] finished tweaking git repo https://github.com/puzza007/ksero
[INFO] tweaked toml for git repo https://github.com/puzza007/ksero written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/puzza007/ksero already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6c595e1520555fa49fe70fe979996b7a0b5e0dfe0ab3f4f201d9204568f16fe3
[INFO] running `Command { std: "docker" "start" "-a" "6c595e1520555fa49fe70fe979996b7a0b5e0dfe0ab3f4f201d9204568f16fe3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6c595e1520555fa49fe70fe979996b7a0b5e0dfe0ab3f4f201d9204568f16fe3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c595e1520555fa49fe70fe979996b7a0b5e0dfe0ab3f4f201d9204568f16fe3", kill_on_drop: false }`
[INFO] [stdout] 6c595e1520555fa49fe70fe979996b7a0b5e0dfe0ab3f4f201d9204568f16fe3
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d064d1c3f68b395609bf4026cb5ad50c8380d88fb5f75d865aaed8d8125c05d6
[INFO] running `Command { std: "docker" "start" "-a" "d064d1c3f68b395609bf4026cb5ad50c8380d88fb5f75d865aaed8d8125c05d6", kill_on_drop: false }`
[INFO] [stderr]     Checking walkdir v2.2.7
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking pretty-bytes v0.2.2
[INFO] [stderr]     Checking twox-hash v1.1.1
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]     Checking rayon v1.0.3
[INFO] [stderr]  Documenting ksero v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(duration_as_u128)]
[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 `ksero`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name ksero src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern clap=/opt/rustwide/target/debug/deps/libclap-3c2d5eb2429e100b.rmeta --extern pretty_bytes=/opt/rustwide/target/debug/deps/libpretty_bytes-dcf1d24ef19947e9.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-10b6d705094af3ac.rmeta --extern twox_hash=/opt/rustwide/target/debug/deps/libtwox_hash-c4f8e11690d7a655.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-b62ec0bd774bb295.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d064d1c3f68b395609bf4026cb5ad50c8380d88fb5f75d865aaed8d8125c05d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d064d1c3f68b395609bf4026cb5ad50c8380d88fb5f75d865aaed8d8125c05d6", kill_on_drop: false }`
[INFO] [stdout] d064d1c3f68b395609bf4026cb5ad50c8380d88fb5f75d865aaed8d8125c05d6
