[INFO] cloning repository https://github.com/kirillt/ark-tagger
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kirillt/ark-tagger" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkirillt%2Fark-tagger", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkirillt%2Fark-tagger'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1dd86d732fa4b6c344a87f6acc94f1dc3887950d
[INFO] documenting kirillt/ark-tagger 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%2Fkirillt%2Fark-tagger" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kirillt/ark-tagger 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/kirillt/ark-tagger
[INFO] finished tweaking git repo https://github.com/kirillt/ark-tagger
[INFO] tweaked toml for git repo https://github.com/kirillt/ark-tagger written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/kirillt/ark-tagger 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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a8a1c82ed9c9259ba6391dd00c29eaada04e134640f03f229ddcc8eecf2a72cc
[INFO] running `Command { std: "docker" "start" "-a" "a8a1c82ed9c9259ba6391dd00c29eaada04e134640f03f229ddcc8eecf2a72cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8a1c82ed9c9259ba6391dd00c29eaada04e134640f03f229ddcc8eecf2a72cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8a1c82ed9c9259ba6391dd00c29eaada04e134640f03f229ddcc8eecf2a72cc", kill_on_drop: false }`
[INFO] [stdout] a8a1c82ed9c9259ba6391dd00c29eaada04e134640f03f229ddcc8eecf2a72cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] d4211bea3179647b47a6f6d7739a066ad7eab13a963f672aba9637a66fc946b6
[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" "d4211bea3179647b47a6f6d7739a066ad7eab13a963f672aba9637a66fc946b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.8
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[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling xml-rs v0.8.2
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking smallvec v1.3.0
[INFO] [stderr]     Checking downcast-rs v1.1.1
[INFO] [stderr]     Checking futures-sink v0.3.4
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[INFO] [stderr]     Checking atom v0.3.5
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking futures-timer v2.0.2
[INFO] [stderr]     Checking once_cell v1.3.1
[INFO] [stderr]     Checking iced_core v0.2.1 (https://github.com/hecrj/iced.git#edd01159)
[INFO] [stderr]     Checking xi-unicode v0.2.0
[INFO] [stderr]     Checking unicode-segmentation v1.6.0
[INFO] [stderr]     Checking instant v0.1.2
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[INFO] [stderr]     Checking opener v0.4.1
[INFO] [stderr]     Checking number_prefix v0.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
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[INFO] [stderr]     Checking dlib v0.4.1
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[INFO] [stderr]    Compiling peek-poke-derive v0.2.1
[INFO] [stderr]    Compiling futures-macro v0.3.4
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[INFO] [stderr]    Compiling derive_more v0.99.5
[INFO] [stderr]     Checking gfx-backend-vulkan v0.5.2
[INFO] [stderr]     Checking peek-poke v0.2.0
[INFO] [stderr]     Checking futures-util v0.3.4
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[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking iced_futures v0.1.1 (https://github.com/hecrj/iced.git#edd01159)
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[INFO] [stderr]     Checking iced_native v0.2.1 (https://github.com/hecrj/iced.git#edd01159)
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[INFO] [stderr]     Checking wgpu_glyph v0.8.0
[INFO] [stderr]     Checking iced_wgpu v0.2.1 (https://github.com/hecrj/iced.git#edd01159)
[INFO] [stderr]     Checking smithay-client-toolkit v0.6.6
[INFO] [stderr]     Checking smithay-clipboard v0.3.7
[INFO] [stderr]     Checking winit v0.22.1
[INFO] [stderr]     Checking clipboard_wayland v0.1.0
[INFO] [stderr]     Checking window_clipboard v0.1.1
[INFO] [stderr]     Checking iced_winit v0.1.1 (https://github.com/hecrj/iced.git#edd01159)
[INFO] [stderr]     Checking iced v0.1.1 (https://github.com/hecrj/iced.git#edd01159)
[INFO] [stderr]  Documenting ark-tagger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::option::NoneError`
[INFO] [stdout]  --> src/model/id.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::option::NoneError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^ no `NoneError` in `option`
[INFO] [stdout] 
[INFO] [stdout] 
[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(try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `ark-tagger`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name ark_tagger 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 chrono=/opt/rustwide/target/debug/deps/libchrono-f3f276a8080888eb.rmeta --extern crc32fast=/opt/rustwide/target/debug/deps/libcrc32fast-50a51f06c8df4482.rmeta --extern derive_more=/opt/rustwide/target/debug/deps/libderive_more-6128802a9587ff7f.so --extern iced=/opt/rustwide/target/debug/deps/libiced-8d4d840b456fe67c.rmeta --extern iced_native=/opt/rustwide/target/debug/deps/libiced_native-c6b417350eadd7ae.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-acd7d23482fe8b54.rmeta --extern number_prefix=/opt/rustwide/target/debug/deps/libnumber_prefix-33ed507fe0232e53.rmeta --extern opener=/opt/rustwide/target/debug/deps/libopener-ef77376ce7454015.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d4211bea3179647b47a6f6d7739a066ad7eab13a963f672aba9637a66fc946b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4211bea3179647b47a6f6d7739a066ad7eab13a963f672aba9637a66fc946b6", kill_on_drop: false }`
[INFO] [stdout] d4211bea3179647b47a6f6d7739a066ad7eab13a963f672aba9637a66fc946b6
