[INFO] cloning repository https://github.com/dmaahs2017/planner-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dmaahs2017/planner-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdmaahs2017%2Fplanner-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdmaahs2017%2Fplanner-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3a4d236001ab815ff8390663868337f89817bc2
[INFO] documenting dmaahs2017/planner-rs 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%2Fdmaahs2017%2Fplanner-rs" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dmaahs2017/planner-rs 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/dmaahs2017/planner-rs
[INFO] finished tweaking git repo https://github.com/dmaahs2017/planner-rs
[INFO] tweaked toml for git repo https://github.com/dmaahs2017/planner-rs written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/dmaahs2017/planner-rs 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 app_dirs2 v2.3.2
[INFO] [stderr]   Downloaded textwrap v0.14.0
[INFO] [stderr]   Downloaded assert_cmd v1.0.5
[INFO] [stderr]   Downloaded calendarize v1.1.0
[INFO] [stderr]   Downloaded comfy-table v3.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 25cae0fce6e5ae56085eb899e858d5712ea32e0b6e88df800dc7f6ba75deb53c
[INFO] running `Command { std: "docker" "start" "-a" "25cae0fce6e5ae56085eb899e858d5712ea32e0b6e88df800dc7f6ba75deb53c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25cae0fce6e5ae56085eb899e858d5712ea32e0b6e88df800dc7f6ba75deb53c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25cae0fce6e5ae56085eb899e858d5712ea32e0b6e88df800dc7f6ba75deb53c", kill_on_drop: false }`
[INFO] [stdout] 25cae0fce6e5ae56085eb899e858d5712ea32e0b6e88df800dc7f6ba75deb53c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 0f07c8b1b2f4f31af4ef1408859ebc3a0721e76fc1ec9ba9758d4b315b122f6c
[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" "0f07c8b1b2f4f31af4ef1408859ebc3a0721e76fc1ec9ba9758d4b315b122f6c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling signal-hook v0.3.9
[INFO] [stderr]     Checking os_str_bytes v3.1.0
[INFO] [stderr]     Checking strum v0.21.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking textwrap v0.14.0
[INFO] [stderr]     Checking app_dirs2 v2.3.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking signal-hook-mio v0.2.1
[INFO] [stderr]     Checking crossterm v0.20.0
[INFO] [stderr]    Compiling strum_macros v0.21.1
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2 (https://github.com/clap-rs/clap#89d1519f)
[INFO] [stderr]     Checking comfy-table v3.0.0
[INFO] [stderr]     Checking clap v3.0.0-beta.2 (https://github.com/clap-rs/clap#89d1519f)
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking ron v0.6.4
[INFO] [stderr]     Checking calendarize v1.1.0
[INFO] [stderr]  Documenting planner v0.1.0 (/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(io_read_to_string)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(slice_group_by)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[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 `planner`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name planner src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=31655e236d964123 -L dependency=/opt/rustwide/target/debug/deps --extern app_dirs=/opt/rustwide/target/debug/deps/libapp_dirs2-c73499e18aafd393.rmeta --extern calendarize=/opt/rustwide/target/debug/deps/libcalendarize-500c9c22d1754b5a.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-918ccdb0ee429d45.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-02187a1ae22eff9a.rmeta --extern comfy_table=/opt/rustwide/target/debug/deps/libcomfy_table-1d062da044e28b02.rmeta --extern ron=/opt/rustwide/target/debug/deps/libron-50ebc07b3800ad33.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-54de1616f51f30cc.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "0f07c8b1b2f4f31af4ef1408859ebc3a0721e76fc1ec9ba9758d4b315b122f6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f07c8b1b2f4f31af4ef1408859ebc3a0721e76fc1ec9ba9758d4b315b122f6c", kill_on_drop: false }`
[INFO] [stdout] 0f07c8b1b2f4f31af4ef1408859ebc3a0721e76fc1ec9ba9758d4b315b122f6c