[INFO] fetching crate yts 0.1.0...
[INFO] documenting yts-0.1.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate yts 0.1.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate yts 0.1.0 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 crates.io crate yts 0.1.0
[INFO] finished tweaking crates.io crate yts 0.1.0
[INFO] tweaked toml for crates.io crate yts 0.1.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate yts 0.1.0 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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 8439014c865a4e298c6ea1d777ecca41c1b158354d8f3c6d06c78f54b65baf67
[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" "8439014c865a4e298c6ea1d777ecca41c1b158354d8f3c6d06c78f54b65baf67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8439014c865a4e298c6ea1d777ecca41c1b158354d8f3c6d06c78f54b65baf67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8439014c865a4e298c6ea1d777ecca41c1b158354d8f3c6d06c78f54b65baf67", kill_on_drop: false }`
[INFO] [stdout] 8439014c865a4e298c6ea1d777ecca41c1b158354d8f3c6d06c78f54b65baf67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] e31ac8b4370f7847625f87041aa1feac74962ee545f17b2ee605eadefb32a5da
[INFO] running `Command { std: "docker" "start" "-a" "e31ac8b4370f7847625f87041aa1feac74962ee545f17b2ee605eadefb32a5da", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling siphasher v0.3.5
[INFO] [stderr]    Compiling fst v0.4.6
[INFO] [stderr]    Compiling openssl v0.10.34
[INFO] [stderr]    Compiling pocket-resources v0.3.2
[INFO] [stderr]     Checking number_prefix v0.3.0
[INFO] [stderr]     Checking smawk v0.3.1
[INFO] [stderr]    Compiling openssl-sys v0.9.63
[INFO] [stderr]    Compiling tokio v1.6.1
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]     Checking tendril v0.4.2
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking terminal_size v0.1.17
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking filetime v0.2.14
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]     Checking xattr v0.2.2
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking mio v0.7.11
[INFO] [stderr]     Checking bzip2-sys v0.1.10+1.0.8
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking console v0.14.1
[INFO] [stderr]     Checking env_logger v0.8.3
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking tar v0.4.35
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking indicatif v0.15.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling markup5ever v0.10.1
[INFO] [stderr]     Checking tokio-util v0.6.7
[INFO] [stderr]     Checking h2 v0.3.3
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]    Compiling strum_macros v0.20.1
[INFO] [stderr]     Checking thiserror v1.0.25
[INFO] [stderr]     Checking zip v0.5.12
[INFO] [stderr]     Checking strum v0.20.0
[INFO] [stderr]     Checking zip-extensions v0.6.0
[INFO] [stderr]     Checking pin-project v1.0.7
[INFO] [stderr]     Checking hyper v0.14.8
[INFO] [stderr]     Checking serde v1.0.126
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking string_cache v0.8.1
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking hyphenation_commons v0.8.0
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking reqwest v0.11.3
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]    Compiling hyphenation v0.8.0
[INFO] [stderr]     Checking xml5ever v0.16.1
[INFO] [stderr]     Checking cached-path v0.5.1
[INFO] [stderr]     Checking markup5ever_rcdom v0.1.0
[INFO] [stderr]     Checking textwrap v0.13.4
[INFO] [stderr]     Checking select v0.6.0-alpha.1
[INFO] [stderr]  Documenting yts 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(bool_to_option)]
[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 `yts`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name yts src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern cached_path=/opt/rustwide/target/debug/deps/libcached_path-a12caa0e13cc24f2.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-96fb0b4533d0c22b.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-e338831153faea83.rmeta --extern colored=/opt/rustwide/target/debug/deps/libcolored-e8a72438076df33e.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-5dac6f2bcc410c6f.rmeta --extern hyphenation=/opt/rustwide/target/debug/deps/libhyphenation-018566b229f80740.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f8abb66ffc16068c.rmeta --extern prettytable=/opt/rustwide/target/debug/deps/libprettytable-de9b754143dc5478.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-66f5756dce4a0b0d.rmeta --extern select=/opt/rustwide/target/debug/deps/libselect-bd886cc167e18065.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-6421afb3f88c166b.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-34fc8d20aec660a5.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-3832a3100ebc2524.rmeta --extern textwrap=/opt/rustwide/target/debug/deps/libtextwrap-ad08d3c42e9619b1.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-a8dd18f8579ba28a.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e31ac8b4370f7847625f87041aa1feac74962ee545f17b2ee605eadefb32a5da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e31ac8b4370f7847625f87041aa1feac74962ee545f17b2ee605eadefb32a5da", kill_on_drop: false }`
[INFO] [stdout] e31ac8b4370f7847625f87041aa1feac74962ee545f17b2ee605eadefb32a5da
