[INFO] cloning repository https://github.com/vn-ki/letterboxd-compare
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vn-ki/letterboxd-compare" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvn-ki%2Fletterboxd-compare", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvn-ki%2Fletterboxd-compare'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ee8c5d5852ab663270d7d620814acef096cd5d3d
[INFO] documenting vn-ki/letterboxd-compare 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%2Fvn-ki%2Fletterboxd-compare" "/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/vn-ki/letterboxd-compare 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] removed /workspace/builds/worker-9/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/vn-ki/letterboxd-compare
[INFO] finished tweaking git repo https://github.com/vn-ki/letterboxd-compare
[INFO] tweaked toml for git repo https://github.com/vn-ki/letterboxd-compare written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/vn-ki/letterboxd-compare 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-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" "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] [stdout] 6114ae11586e920a0e9e20eec70ece227f971b7274d06d942a934893e9b56d61
[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" "6114ae11586e920a0e9e20eec70ece227f971b7274d06d942a934893e9b56d61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6114ae11586e920a0e9e20eec70ece227f971b7274d06d942a934893e9b56d61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6114ae11586e920a0e9e20eec70ece227f971b7274d06d942a934893e9b56d61", kill_on_drop: false }`
[INFO] [stdout] 6114ae11586e920a0e9e20eec70ece227f971b7274d06d942a934893e9b56d61
[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" "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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d382b7d2e186925601ccae5b9f32dea6ef6652e748b308eca6e1c9ceddf4c445
[INFO] running `Command { std: "docker" "start" "-a" "d382b7d2e186925601ccae5b9f32dea6ef6652e748b308eca6e1c9ceddf4c445", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling askama_escape v0.2.0
[INFO] [stderr]     Checking dtoa-short v0.3.3
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking tendril v0.4.1
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking native-tls v0.2.6
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking headers v0.3.2
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking tungstenite v0.11.1
[INFO] [stderr]     Checking multipart v0.17.0
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]    Compiling selectors v0.22.0
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling pin-project-internal v1.0.2
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling cssparser v0.27.2
[INFO] [stderr]    Compiling cssparser-macros v0.6.0
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling derive_more v0.99.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]     Checking tokio v0.2.24
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking tracing v0.1.22
[INFO] [stderr]     Checking pin-project v1.0.2
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking serde v1.0.118
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking futures-executor v0.3.8
[INFO] [stderr]     Checking tokio-tungstenite v0.11.0
[INFO] [stderr]     Checking futures v0.3.8
[INFO] [stderr]     Checking serde_json v1.0.60
[INFO] [stderr]     Checking string_cache v0.8.1
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking askama_shared v0.8.0
[INFO] [stderr]     Checking tracing-subscriber v0.2.15
[INFO] [stderr]    Compiling markup5ever v0.10.0
[INFO] [stderr]    Compiling askama_derive v0.8.0
[INFO] [stderr]     Checking hyper v0.13.9
[INFO] [stderr]     Checking scraper v0.12.0
[INFO] [stderr]     Checking askama v0.8.0
[INFO] [stderr]     Checking hyper-tls v0.4.3
[INFO] [stderr]     Checking warp v0.2.5
[INFO] [stderr]     Checking reqwest v0.10.9
[INFO] [stderr]  Documenting letterboxd-compare 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(async_closure)]
[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 `letterboxd-compare`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name letterboxd_compare 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 anyhow=/opt/rustwide/target/debug/deps/libanyhow-ecc373997957a2e0.rmeta --extern askama=/opt/rustwide/target/debug/deps/libaskama-8189dd78058412f9.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-8d296a2f2351b712.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-acd7d23482fe8b54.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-a1e6614035fc64c6.rmeta --extern scraper=/opt/rustwide/target/debug/deps/libscraper-94539b485ae7e645.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-242662fdb5a2710b.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-8a12272b73b5b7bb.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-dc7cb9bdecfed4a9.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-528d601688812e2a.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-6ec22c4dda0c5e91.rmeta --extern tracing_futures=/opt/rustwide/target/debug/deps/libtracing_futures-688c7ba2410ca5da.rmeta --extern tracing_subscriber=/opt/rustwide/target/debug/deps/libtracing_subscriber-6b5a42a64dab2e67.rmeta --extern warp=/opt/rustwide/target/debug/deps/libwarp-73844bc6fad49cdd.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d382b7d2e186925601ccae5b9f32dea6ef6652e748b308eca6e1c9ceddf4c445", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d382b7d2e186925601ccae5b9f32dea6ef6652e748b308eca6e1c9ceddf4c445", kill_on_drop: false }`
[INFO] [stdout] d382b7d2e186925601ccae5b9f32dea6ef6652e748b308eca6e1c9ceddf4c445
