[INFO] cloning repository https://github.com/xy137/blacklist
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xy137/blacklist" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxy137%2Fblacklist", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxy137%2Fblacklist'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 022eb8c1039b890f4de3cc9796c3b9519d6eba64
[INFO] documenting xy137/blacklist 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%2Fxy137%2Fblacklist" "/workspace/builds/worker-33/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-33/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xy137/blacklist 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/xy137/blacklist
[INFO] finished tweaking git repo https://github.com/xy137/blacklist
[INFO] tweaked toml for git repo https://github.com/xy137/blacklist written to /workspace/builds/worker-33/source/Cargo.toml
[INFO] crate git repo https://github.com/xy137/blacklist 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded command_attr v0.3.0-rc.0
[INFO] [stderr]   Downloaded sled v0.34.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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] 262a056940367d2a702dc596ffa21dbb14d09ac384dfbfa604523231bc760d10
[INFO] running `Command { std: "docker" "start" "-a" "262a056940367d2a702dc596ffa21dbb14d09ac384dfbfa604523231bc760d10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "262a056940367d2a702dc596ffa21dbb14d09ac384dfbfa604523231bc760d10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "262a056940367d2a702dc596ffa21dbb14d09ac384dfbfa604523231bc760d10", kill_on_drop: false }`
[INFO] [stdout] 262a056940367d2a702dc596ffa21dbb14d09ac384dfbfa604523231bc760d10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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] 7885af2a54dbe4a7c4b6c9f7b32e1afa596bc9d8c026f69dd39c6d3e84da6fba
[INFO] running `Command { std: "docker" "start" "-a" "7885af2a54dbe4a7c4b6c9f7b32e1afa596bc9d8c026f69dd39c6d3e84da6fba", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
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[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling byteorder v1.3.4
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[INFO] [stderr]    Compiling maybe-uninit v2.0.0
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[INFO] [stderr]    Compiling unicase v2.6.0
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[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]     Checking rand_chacha v0.2.2
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[INFO] [stderr]     Checking sled v0.34.3
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[INFO] [stderr]     Checking webpki v0.21.3
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[INFO] [stderr]     Checking rustls v0.18.1
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[INFO] [stderr]     Checking webpki-roots v0.17.0
[INFO] [stderr]     Checking webpki-roots v0.19.0
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling async-trait v0.1.38
[INFO] [stderr]    Compiling command_attr v0.3.0-rc.0
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-rustls v0.14.0
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking h2 v0.2.6
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking async-tls v0.6.0
[INFO] [stderr]     Checking async-tungstenite v0.4.2
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking hyper v0.13.7
[INFO] [stderr]     Checking hyper-rustls v0.21.0
[INFO] [stderr]     Checking reqwest v0.10.8
[INFO] [stderr]  Documenting blacklist_bot 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(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 `blacklist_bot`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name blacklist_bot 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 dirs=/opt/rustwide/target/debug/deps/libdirs-d17a4ab162744aad.rmeta --extern dotenv=/opt/rustwide/target/debug/deps/libdotenv-5dfe2bdb02b168dd.rmeta --extern serenity=/opt/rustwide/target/debug/deps/libserenity-d49b75778e0a903c.rmeta --extern sled=/opt/rustwide/target/debug/deps/libsled-877099e5ce0bb6c6.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-e8ecdabcdb487a85.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "7885af2a54dbe4a7c4b6c9f7b32e1afa596bc9d8c026f69dd39c6d3e84da6fba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7885af2a54dbe4a7c4b6c9f7b32e1afa596bc9d8c026f69dd39c6d3e84da6fba", kill_on_drop: false }`
[INFO] [stdout] 7885af2a54dbe4a7c4b6c9f7b32e1afa596bc9d8c026f69dd39c6d3e84da6fba
