[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 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsouvik1997%2Ffsbench" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/souvik1997/fsbench on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", 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-9/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" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 53cccd4283391a47a3624eb83e91412fab73438f72fe66235d2af9a0b53c1467
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "53cccd4283391a47a3624eb83e91412fab73438f72fe66235d2af9a0b53c1467", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53cccd4283391a47a3624eb83e91412fab73438f72fe66235d2af9a0b53c1467", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53cccd4283391a47a3624eb83e91412fab73438f72fe66235d2af9a0b53c1467", kill_on_drop: false }`
[INFO] [stdout] 53cccd4283391a47a3624eb83e91412fab73438f72fe66235d2af9a0b53c1467
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8e0752f3963da20d57f780f74ebef63776a65b9f4d1c0703d9db10cc6cc91e5f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8e0752f3963da20d57f780f74ebef63776a65b9f4d1c0703d9db10cc6cc91e5f", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]     Checking serde v1.0.29
[INFO] [stderr]     Checking either v1.4.0
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking colored v1.6.0
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking fern v0.5.2
[INFO] [stderr]     Checking bytes v0.4.6
[INFO] [stderr]     Checking remove_dir_all v0.3.0
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]     Checking crossbeam-epoch v0.3.0
[INFO] [stderr]    Compiling syn v0.12.14
[INFO] [stderr]     Checking tempdir v0.3.6
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking num-bigint v0.1.43
[INFO] [stderr]     Checking num-iter v0.1.35
[INFO] [stderr]     Checking rayon v1.0.0
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking chrono v0.4.0
[INFO] [stderr]    Compiling serde_derive_internals v0.20.0
[INFO] [stderr]    Compiling num-derive v0.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.29
[INFO] [stderr]     Checking serde_json v1.0.11
[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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(duration_extras)]
[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 `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 --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-a89612c8cfb60e64.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-de1a9786c05281fd.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-b7fa4f06e203df3b.rmeta --extern fern=/opt/rustwide/target/debug/deps/libfern-580f899b67c92b6b.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-c28cf9a5b3a596ae.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-6edc15683c877800.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-55620edb66607205.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-908a1fe2f70369da.rmeta --extern num_derive=/opt/rustwide/target/debug/deps/libnum_derive-af8734729fe84397.so --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-d9632b779684b125.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-9191069fb04271c0.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-3b4f85927ccfb9c5.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-479d8a04a76094d5.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-dde2e04ef8c6baef.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-27070133aec93582.rmeta --extern tempdir=/opt/rustwide/target/debug/deps/libtempdir-355061e13ae05e1b.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "8e0752f3963da20d57f780f74ebef63776a65b9f4d1c0703d9db10cc6cc91e5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e0752f3963da20d57f780f74ebef63776a65b9f4d1c0703d9db10cc6cc91e5f", kill_on_drop: false }`
[INFO] [stdout] 8e0752f3963da20d57f780f74ebef63776a65b9f4d1c0703d9db10cc6cc91e5f