[INFO] cloning repository https://github.com/souvik1997/fsbench
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/souvik1997/fsbench" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsouvik1997%2Ffsbench", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsouvik1997%2Ffsbench'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 77cc337e9e88a07ae9381abb4710f4c1b4ae2423
[INFO] documenting souvik1997/fsbench against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsouvik1997%2Ffsbench" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/souvik1997/fsbench 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 git repo https://github.com/souvik1997/fsbench
[INFO] finished tweaking git repo https://github.com/souvik1997/fsbench
[INFO] tweaked toml for git repo https://github.com/souvik1997/fsbench written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/souvik1997/fsbench already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.29
[INFO] [stderr]   Downloaded fern v0.5.2
[INFO] [stderr]   Downloaded serde v1.0.29
[INFO] [stderr]   Downloaded rayon v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 452692d13124662c2196edb6b5030adefab42bf232257b562b545bf914346afc
[INFO] running `Command { std: "docker" "start" "-a" "452692d13124662c2196edb6b5030adefab42bf232257b562b545bf914346afc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "452692d13124662c2196edb6b5030adefab42bf232257b562b545bf914346afc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "452692d13124662c2196edb6b5030adefab42bf232257b562b545bf914346afc", kill_on_drop: false }`
[INFO] [stdout] 452692d13124662c2196edb6b5030adefab42bf232257b562b545bf914346afc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] d22bbcddf1529de1222e4ad6db9255a2f9fd120b0dee54474d04aaa44e1f08a8
[INFO] running `Command { std: "docker" "start" "-a" "d22bbcddf1529de1222e4ad6db9255a2f9fd120b0dee54474d04aaa44e1f08a8", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking either v1.4.0
[INFO] [stderr]     Checking serde v1.0.29
[INFO] [stderr]     Checking ansi_term v0.10.2
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking atty v0.2.6
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]     Checking colored v1.6.0
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking fern v0.5.2
[INFO] [stderr]     Checking crossbeam-epoch v0.3.0
[INFO] [stderr]     Checking bytes v0.4.6
[INFO] [stderr]     Checking clap v2.29.2
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]     Checking remove_dir_all v0.3.0
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling syn v0.12.14
[INFO] [stderr]     Checking tempdir v0.3.6
[INFO] [stderr]     Checking num-iter v0.1.35
[INFO] [stderr]     Checking rayon v1.0.0
[INFO] [stderr]     Checking num-bigint v0.1.43
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]    Compiling serde_derive_internals v0.20.0
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking chrono v0.4.0
[INFO] [stderr]    Compiling num-derive v0.2.0
[INFO] [stderr]     Checking serde_json v1.0.11
[INFO] [stderr]    Compiling serde_derive v1.0.29
[INFO] [stderr]  Documenting fsbench 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(duration_extras)]
[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 `fsbench`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name fsbench src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=d54fb0b2e083624a -L dependency=/opt/rustwide/target/debug/deps --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-dede8deb4c33c724.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-89ccb365ed22920a.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-77e150c01162872d.rmeta --extern fern=/opt/rustwide/target/debug/deps/libfern-48deb182d11f7b2d.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-a1487687fc6ed27a.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-d515a76d90b28335.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-acbcfb7758e9e515.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-b92a8fc115d99fe4.rmeta --extern num_derive=/opt/rustwide/target/debug/deps/libnum_derive-49590b3ed06176f9.so --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-f5f02261a2266d21.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-338a2c815248c6a6.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-10be68b2b5438190.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-96b90c7089704f7d.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-2b952bbdf979c26d.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-893b8e8b4940f431.rmeta --extern tempdir=/opt/rustwide/target/debug/deps/libtempdir-c4371edfd518dbe0.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d22bbcddf1529de1222e4ad6db9255a2f9fd120b0dee54474d04aaa44e1f08a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d22bbcddf1529de1222e4ad6db9255a2f9fd120b0dee54474d04aaa44e1f08a8", kill_on_drop: false }`
[INFO] [stdout] d22bbcddf1529de1222e4ad6db9255a2f9fd120b0dee54474d04aaa44e1f08a8