[INFO] fetching crate fart-cli 0.4.0...
[INFO] documenting fart-cli-0.4.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate fart-cli 0.4.0 into /workspace/builds/worker-49/source
[INFO] validating manifest of crates.io crate fart-cli 0.4.0 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 fart-cli 0.4.0
[INFO] finished tweaking crates.io crate fart-cli 0.4.0
[INFO] tweaked toml for crates.io crate fart-cli 0.4.0 written to /workspace/builds/worker-49/source/Cargo.toml
[INFO] crate crates.io crate fart-cli 0.4.0 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 }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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] 9a382459654940d4b44dbfe8dede0ce21a844bd8828b2b61591480c47e500a0a
[INFO] running `Command { std: "docker" "start" "-a" "9a382459654940d4b44dbfe8dede0ce21a844bd8828b2b61591480c47e500a0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a382459654940d4b44dbfe8dede0ce21a844bd8828b2b61591480c47e500a0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a382459654940d4b44dbfe8dede0ce21a844bd8828b2b61591480c47e500a0a", kill_on_drop: false }`
[INFO] [stdout] 9a382459654940d4b44dbfe8dede0ce21a844bd8828b2b61591480c47e500a0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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] fd1206250fbbbe1133dbf8405d3f03654570e9e989028e417405399ee6fd672e
[INFO] running `Command { std: "docker" "start" "-a" "fd1206250fbbbe1133dbf8405d3f03654570e9e989028e417405399ee6fd672e", 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 log v0.4.8
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]     Checking futures-io v0.3.1
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[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-sink v0.3.1
[INFO] [stderr]     Checking futures-task v0.3.1
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[INFO] [stderr]     Checking bytes v0.5.3
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking async-task v1.0.0
[INFO] [stderr]     Checking inotify-sys v0.1.3
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[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking kv-log-macro v1.0.4
[INFO] [stderr]     Checking tokio-threadpool v0.1.17
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[INFO] [stderr]     Checking tokio-reactor v0.1.11
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking notify v4.0.14
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking broadcaster v0.2.6
[INFO] [stderr]     Checking async-std v1.3.0
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling structopt-derive v0.3.5
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking structopt v0.3.5
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking http-service v0.4.0
[INFO] [stderr]     Checking http-service-hyper v0.4.1
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking serde_qs v0.5.2
[INFO] [stderr]     Checking tide v0.4.0
[INFO] [stderr]  Documenting fart-cli v0.4.0 (/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 `fart-cli`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name fart 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 async_std=/opt/rustwide/target/debug/deps/libasync_std-22f4979ca2ae0629.rmeta --extern bytes=/opt/rustwide/target/debug/deps/libbytes-e49724eda1c299fd.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-b25c5ab83eb6a14a.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-b3ae1520324633c6.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-ef6e15006e0ed81d.rmeta --extern http_service=/opt/rustwide/target/debug/deps/libhttp_service-fabeee7932de3338.rmeta --extern notify=/opt/rustwide/target/debug/deps/libnotify-0c0084b90e2a0002.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-db4dc0d084e9af7e.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-55eb031658bb41af.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-b4dd796c00713b05.rmeta --extern tide=/opt/rustwide/target/debug/deps/libtide-0390f9241b70994a.rmeta --cap-lints=warn --crate-version 0.4.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "fd1206250fbbbe1133dbf8405d3f03654570e9e989028e417405399ee6fd672e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd1206250fbbbe1133dbf8405d3f03654570e9e989028e417405399ee6fd672e", kill_on_drop: false }`
[INFO] [stdout] fd1206250fbbbe1133dbf8405d3f03654570e9e989028e417405399ee6fd672e
