[INFO] cloning repository https://github.com/iovxw/rssbot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iovxw/rssbot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiovxw%2Frssbot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiovxw%2Frssbot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b7d8d0dcd745082a66d28c63bdf5b9575ebdb35f
[INFO] documenting iovxw/rssbot 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%2Fiovxw%2Frssbot" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iovxw/rssbot 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/iovxw/rssbot
[INFO] finished tweaking git repo https://github.com/iovxw/rssbot
[INFO] tweaked toml for git repo https://github.com/iovxw/rssbot written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/iovxw/rssbot 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] ecacf9d462e3ab0eeabcfd8abf32dd7385bf5f81b103a703beda54752739ef57
[INFO] running `Command { std: "docker" "start" "-a" "ecacf9d462e3ab0eeabcfd8abf32dd7385bf5f81b103a703beda54752739ef57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ecacf9d462e3ab0eeabcfd8abf32dd7385bf5f81b103a703beda54752739ef57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecacf9d462e3ab0eeabcfd8abf32dd7385bf5f81b103a703beda54752739ef57", kill_on_drop: false }`
[INFO] [stdout] ecacf9d462e3ab0eeabcfd8abf32dd7385bf5f81b103a703beda54752739ef57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] cdba0a65051070578446f2e39292c5c97e4d8b6b2e7ecc324a9feee157eaf8f3
[INFO] running `Command { std: "docker" "start" "-a" "cdba0a65051070578446f2e39292c5c97e4d8b6b2e7ecc324a9feee157eaf8f3", 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 libc v0.2.88
[INFO] [stderr]     Checking futures-core v0.3.14
[INFO] [stderr]     Checking arc-swap v0.4.5
[INFO] [stderr]     Checking futures-sink v0.3.14
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling pin-project-internal v0.4.26
[INFO] [stderr]     Checking futures-io v0.3.14
[INFO] [stderr]     Checking futures-task v0.3.14
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling pinyin v0.8.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking url v2.2.0
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking quick-xml v0.22.0
[INFO] [stderr]     Checking futures-channel v0.3.14
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]    Compiling syn v1.0.64
[INFO] [stderr]     Checking regex v1.4.6
[INFO] [stderr]     Checking ring v0.16.11
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking flate2 v1.0.14
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking async-compression v0.3.7
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking typed-headers v0.2.0
[INFO] [stderr]     Checking sct v0.6.0
[INFO] [stderr]     Checking webpki v0.21.2
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking ct-logs v0.6.0
[INFO] [stderr]     Checking rustls v0.16.0
[INFO] [stderr]     Checking rustls v0.18.1
[INFO] [stderr]     Checking webpki-roots v0.20.0
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling pmutil v0.5.3
[INFO] [stderr]     Checking atomicwrites v0.3.0
[INFO] [stderr]     Checking rustls-native-certs v0.1.0
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling futures-macro v0.3.14
[INFO] [stderr]    Compiling tracing-attributes v0.1.13
[INFO] [stderr]    Compiling paste-impl v0.1.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling is-macro v0.1.9
[INFO] [stderr]     Checking paste v0.1.11
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking futures-util v0.3.14
[INFO] [stderr]    Compiling structopt-derive v0.4.15
[INFO] [stderr]     Checking tracing v0.1.25
[INFO] [stderr]     Checking pin-project v0.4.26
[INFO] [stderr]     Checking tracing-futures v0.2.3
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking structopt v0.3.22
[INFO] [stderr]     Checking futures-executor v0.3.14
[INFO] [stderr]     Checking futures v0.3.14
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking tokio-rustls v0.12.2
[INFO] [stderr]     Checking tokio-rustls v0.14.1
[INFO] [stderr]     Checking h2 v0.2.2
[INFO] [stderr]     Checking hyper v0.13.4
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]     Checking hyper-rustls v0.19.1
[INFO] [stderr]     Checking hyper-rustls v0.21.0
[INFO] [stderr]     Checking hyper-proxy v0.6.0
[INFO] [stderr]     Checking reqwest v0.10.10
[INFO] [stderr]     Checking tbot v0.6.7
[INFO] [stderr]    Compiling ctl10n v0.2.0
[INFO] [stderr]    Compiling rssbot v2.0.0-alpha.10 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting rssbot v2.0.0-alpha.10 (/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(backtrace)]
[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 `rssbot`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name rssbot src/main.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --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-ed234740686b5bee.rmeta --extern atomicwrites=/opt/rustwide/target/debug/deps/libatomicwrites-761d44c65e4c73aa.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-2ab31cc57ae33415.rmeta --extern either=/opt/rustwide/target/debug/deps/libeither-c2989fcf2933251d.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-c09b03d62acb1cea.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-acd7d23482fe8b54.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-2b26e8ca876f44b4.rmeta --extern pinyin=/opt/rustwide/target/debug/deps/libpinyin-f7667365478ce6e0.rmeta --extern quick_xml=/opt/rustwide/target/debug/deps/libquick_xml-39c9ad90a4f5f3f7.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-5e1f17597a72f4b1.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-01cdf5d6311f0a05.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-64b0d1293ecc9a1a.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-55b555da6261de81.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-c38d8252e913ccf7.rmeta --extern tbot=/opt/rustwide/target/debug/deps/libtbot-dacc906037529ac4.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-53d072fac563952a.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-669fbb3eb554de3e.rmeta --cap-lints=warn --crate-version 2.0.0-alpha.10` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "cdba0a65051070578446f2e39292c5c97e4d8b6b2e7ecc324a9feee157eaf8f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdba0a65051070578446f2e39292c5c97e4d8b6b2e7ecc324a9feee157eaf8f3", kill_on_drop: false }`
[INFO] [stdout] cdba0a65051070578446f2e39292c5c97e4d8b6b2e7ecc324a9feee157eaf8f3
