[INFO] cloning repository https://github.com/karuna/katsuyou
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/karuna/katsuyou" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaruna%2Fkatsuyou", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaruna%2Fkatsuyou'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d448d032685e962b8ee42d7550a2dd23759faf21
[INFO] documenting karuna/katsuyou/d448d032685e962b8ee42d7550a2dd23759faf21 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%2Fkaruna%2Fkatsuyou" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/karuna/katsuyou 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/karuna/katsuyou
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/karuna/katsuyou
[INFO] tweaked toml for git repo https://github.com/karuna/katsuyou written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/karuna/katsuyou 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 utf8-ranges v1.0.2
[INFO] [stderr]   Downloaded ansi_term v0.11.0
[INFO] [stderr]   Downloaded semver-parser v0.7.0
[INFO] [stderr]   Downloaded semver v0.9.0
[INFO] [stderr]   Downloaded rand_core v0.3.0
[INFO] [stderr]   Downloaded atty v0.2.11
[INFO] [stderr]   Downloaded encode_unicode v0.3.5
[INFO] [stderr]   Downloaded redox_syscall v0.1.50
[INFO] [stderr]   Downloaded clap v2.32.0
[INFO] [stderr]   Downloaded lazy_static v1.2.0
[INFO] [stderr]   Downloaded textwrap v0.10.0
[INFO] [stderr]   Downloaded unicode-width v0.1.5
[INFO] [stderr]   Downloaded termcolor v0.3.6
[INFO] [stderr]   Downloaded void v1.0.2
[INFO] [stderr]   Downloaded unicode-xid v0.1.0
[INFO] [stderr]   Downloaded uuid v0.6.5
[INFO] [stderr]   Downloaded failure_derive v0.1.5
[INFO] [stderr]   Downloaded serde v1.0.84
[INFO] [stderr]   Downloaded quote v0.6.10
[INFO] [stderr]   Downloaded ucd-util v0.1.3
[INFO] [stderr]   Downloaded aho-corasick v0.6.9
[INFO] [stderr]   Downloaded synstructure v0.10.1
[INFO] [stderr]   Downloaded console v0.7.2
[INFO] [stderr]   Downloaded autocfg v0.1.1
[INFO] [stderr]   Downloaded cc v1.0.28
[INFO] [stderr]   Downloaded scopeguard v0.3.3
[INFO] [stderr]   Downloaded owning_ref v0.4.0
[INFO] [stderr]   Downloaded strsim v0.7.0
[INFO] [stderr]   Downloaded bitflags v1.0.4
[INFO] [stderr]   Downloaded vec_map v0.8.1
[INFO] [stderr]   Downloaded fuchsia-zircon-sys v0.3.3
[INFO] [stderr]   Downloaded termion v1.5.1
[INFO] [stderr]   Downloaded rand_os v0.1.0
[INFO] [stderr]   Downloaded regex-syntax v0.6.4
[INFO] [stderr]   Downloaded winapi-x86_64-pc-windows-gnu v0.4.0
[INFO] [stderr]   Downloaded rand_xorshift v0.1.1
[INFO] [stderr]   Downloaded rand_hc v0.1.0
[INFO] [stderr]   Downloaded rustc_version v0.2.3
[INFO] [stderr]   Downloaded unreachable v1.0.0
[INFO] [stderr]   Downloaded parking_lot_core v0.4.0
[INFO] [stderr]   Downloaded stable_deref_trait v1.1.1
[INFO] [stderr]   Downloaded rand_pcg v0.1.1
[INFO] [stderr]   Downloaded parking_lot v0.7.1
[INFO] [stderr]   Downloaded libc v0.2.46
[INFO] [stderr]   Downloaded rand_isaac v0.1.1
[INFO] [stderr]   Downloaded failure v0.1.5
[INFO] [stderr]   Downloaded rand_chacha v0.1.1
[INFO] [stderr]   Downloaded thread_local v0.3.6
[INFO] [stderr]   Downloaded fuchsia-zircon v0.3.3
[INFO] [stderr]   Downloaded winapi-i686-pc-windows-gnu v0.4.0
[INFO] [stderr]   Downloaded remove_dir_all v0.5.1
[INFO] [stderr]   Downloaded version_check v0.1.5
[INFO] [stderr]   Downloaded tempdir v0.3.7
[INFO] [stderr]   Downloaded winapi v0.3.6
[INFO] [stderr]   Downloaded toml v0.4.10
[INFO] [stderr]   Downloaded lock_api v0.1.5
[INFO] [stderr]   Downloaded cloudabi v0.0.3
[INFO] [stderr]   Downloaded memchr v2.1.2
[INFO] [stderr]   Downloaded os_type v2.2.0
[INFO] [stderr]   Downloaded proc-macro2 v0.4.24
[INFO] [stderr]   Downloaded serde_derive v1.0.84
[INFO] [stderr]   Downloaded wincolor v0.1.6
[INFO] [stderr]   Downloaded cfg-if v0.1.6
[INFO] [stderr]   Downloaded human-panic v1.0.1
[INFO] [stderr]   Downloaded redox_termios v0.1.1
[INFO] [stderr]   Downloaded termios v0.3.1
[INFO] [stderr]   Downloaded clicolors-control v1.0.0
[INFO] [stderr]   Downloaded backtrace v0.3.13
[INFO] [stderr]   Downloaded backtrace-sys v0.1.28
[INFO] [stderr]   Downloaded rand v0.6.3
[INFO] [stderr]   Downloaded rustc-demangle v0.1.13
[INFO] [stderr]   Downloaded smallvec v0.6.7
[INFO] [stderr]   Downloaded syn v0.15.23
[INFO] [stderr]   Downloaded rand v0.4.3
[INFO] [stderr]   Downloaded regex v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 3937118c0cb2b66e84b9505f931d657c4da605ec2825ede000b3f72bfdd80d27
[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" "3937118c0cb2b66e84b9505f931d657c4da605ec2825ede000b3f72bfdd80d27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3937118c0cb2b66e84b9505f931d657c4da605ec2825ede000b3f72bfdd80d27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3937118c0cb2b66e84b9505f931d657c4da605ec2825ede000b3f72bfdd80d27", kill_on_drop: false }`
[INFO] [stdout] 3937118c0cb2b66e84b9505f931d657c4da605ec2825ede000b3f72bfdd80d27
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 96d3d48b0318a63d48d1d003b6e331f18ee297e42945e79ce0c5a2bb6fb3cd2d
[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" "96d3d48b0318a63d48d1d003b6e331f18ee297e42945e79ce0c5a2bb6fb3cd2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.46
[INFO] [stderr]    Compiling autocfg v0.1.1
[INFO] [stderr]    Compiling serde v1.0.84
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking rustc-demangle v0.1.13
[INFO] [stderr]     Checking termcolor v0.3.6
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.6.4
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]     Checking smallvec v0.6.7
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.3
[INFO] [stderr]    Compiling backtrace v0.3.13
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]     Checking rand_os v0.1.0
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking clicolors-control v1.0.0
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking regex v1.1.0
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking os_type v2.2.0
[INFO] [stderr]     Checking console v0.7.2
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]    Compiling serde_derive v1.0.84
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking human-panic v1.0.1
[INFO] [stderr]  Documenting katsuyou v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[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 `katsuyou`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name katsuyou src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=21ea5081afcc5a51 -L dependency=/opt/rustwide/target/debug/deps --extern clap=/opt/rustwide/target/debug/deps/libclap-073f8818eb40a471.rmeta --extern console=/opt/rustwide/target/debug/deps/libconsole-14c843bec9f02728.rmeta --extern human_panic=/opt/rustwide/target/debug/deps/libhuman_panic-9a2dcba2ccf976c3.rmeta --cap-lints=warn --crate-version 0.0.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "96d3d48b0318a63d48d1d003b6e331f18ee297e42945e79ce0c5a2bb6fb3cd2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96d3d48b0318a63d48d1d003b6e331f18ee297e42945e79ce0c5a2bb6fb3cd2d", kill_on_drop: false }`
[INFO] [stdout] 96d3d48b0318a63d48d1d003b6e331f18ee297e42945e79ce0c5a2bb6fb3cd2d