[INFO] fetching crate discord-retention-bot 1.0.2...
[INFO] documenting discord-retention-bot-1.0.2 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate discord-retention-bot 1.0.2 into /workspace/builds/worker-78/source
[INFO] validating manifest of crates.io crate discord-retention-bot 1.0.2 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 discord-retention-bot 1.0.2
[INFO] finished tweaking crates.io crate discord-retention-bot 1.0.2
[INFO] tweaked toml for crates.io crate discord-retention-bot 1.0.2 written to /workspace/builds/worker-78/source/Cargo.toml
[INFO] crate crates.io crate discord-retention-bot 1.0.2 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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] dfb708ae0c0164fb9448a53ba00669fb905ad057833ba8c2db360994b7b69800
[INFO] running `Command { std: "docker" "start" "-a" "dfb708ae0c0164fb9448a53ba00669fb905ad057833ba8c2db360994b7b69800", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dfb708ae0c0164fb9448a53ba00669fb905ad057833ba8c2db360994b7b69800", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dfb708ae0c0164fb9448a53ba00669fb905ad057833ba8c2db360994b7b69800", kill_on_drop: false }`
[INFO] [stdout] dfb708ae0c0164fb9448a53ba00669fb905ad057833ba8c2db360994b7b69800
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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] 6e0d6ceccd7667aa261cb00874746703c5f850e3c538a0b6258ee37a6ee41ba1
[INFO] running `Command { std: "docker" "start" "-a" "6e0d6ceccd7667aa261cb00874746703c5f850e3c538a0b6258ee37a6ee41ba1", 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 v1.0.53
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking futures-core v0.3.8
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]     Checking futures-sink v0.3.8
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking pin-project-lite v0.2.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]     Checking pin-project-lite v0.1.11
[INFO] [stderr]     Checking futures-io v0.3.8
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking tower-service v0.3.0
[INFO] [stderr]     Checking cpuid-bool v0.1.2
[INFO] [stderr]    Compiling serde_json v1.0.60
[INFO] [stderr]    Compiling encoding_rs v0.8.26
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking utf-8 v0.7.5
[INFO] [stderr]    Compiling anyhow v1.0.35
[INFO] [stderr]    Compiling serenity v0.9.2
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking ipnet v2.3.0
[INFO] [stderr]     Checking humantime v2.0.1
[INFO] [stderr]     Checking typemap_rev v0.1.4
[INFO] [stderr]     Checking dotenv v0.15.0
[INFO] [stderr]    Compiling unicase v2.6.0
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[INFO] [stderr]     Checking form_urlencoded v1.0.0
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[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking sha-1 v0.9.2
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[INFO] [stderr]    Compiling pin-project-internal v1.0.2
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]    Compiling async-trait v0.1.42
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]     Checking tokio v0.2.23
[INFO] [stderr]     Checking tracing v0.1.22
[INFO] [stderr]     Checking pin-project v1.0.2
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-rustls v0.14.1
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking futures-executor v0.3.8
[INFO] [stderr]     Checking async-tungstenite v0.9.3
[INFO] [stderr]     Checking futures v0.3.8
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking hyper v0.13.9
[INFO] [stderr]     Checking hyper-rustls v0.21.0
[INFO] [stderr]     Checking reqwest v0.10.9
[INFO] [stderr]  Documenting discord-retention-bot v1.0.2 (/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 `discord-retention-bot`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name discord_retention_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 anyhow=/opt/rustwide/target/debug/deps/libanyhow-ecc373997957a2e0.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-b513d7caadab6164.rmeta --extern dotenv=/opt/rustwide/target/debug/deps/libdotenv-fac2af56d99fafd7.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-48081d013cce65e5.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-59b257565b0a002d.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-ad9dab5804e289b3.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-04407112c7abb439.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-7ed66481d39ad35f.rmeta --extern serenity=/opt/rustwide/target/debug/deps/libserenity-15c07066d238d943.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-e25f58bccb948e55.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-473c8e3f275ac002.rmeta --extern tokio_test=/opt/rustwide/target/debug/deps/libtokio_test-008a9c5e1c9f9ef0.rmeta --cap-lints=warn --crate-version 1.0.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "6e0d6ceccd7667aa261cb00874746703c5f850e3c538a0b6258ee37a6ee41ba1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e0d6ceccd7667aa261cb00874746703c5f850e3c538a0b6258ee37a6ee41ba1", kill_on_drop: false }`
[INFO] [stdout] 6e0d6ceccd7667aa261cb00874746703c5f850e3c538a0b6258ee37a6ee41ba1
