[INFO] fetching crate intercom-utils 0.2.0...
[INFO] documenting intercom-utils-0.2.0 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate intercom-utils 0.2.0 into /workspace/builds/worker-71/source
[INFO] validating manifest of crates.io crate intercom-utils 0.2.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate intercom-utils 0.2.0
[INFO] finished tweaking crates.io crate intercom-utils 0.2.0
[INFO] tweaked toml for crates.io crate intercom-utils 0.2.0 written to /workspace/builds/worker-71/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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 if_chain v0.1.3
[INFO] [stderr]   Downloaded sha1 v0.3.0
[INFO] [stderr]   Downloaded intercom-common v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5adac79b1065df233b8eacbe36c964de9db7db98373461a5e6c77cff8fbc7adb
[INFO] running `Command { std: "docker" "start" "-a" "5adac79b1065df233b8eacbe36c964de9db7db98373461a5e6c77cff8fbc7adb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5adac79b1065df233b8eacbe36c964de9db7db98373461a5e6c77cff8fbc7adb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5adac79b1065df233b8eacbe36c964de9db7db98373461a5e6c77cff8fbc7adb", kill_on_drop: false }`
[INFO] [stdout] 5adac79b1065df233b8eacbe36c964de9db7db98373461a5e6c77cff8fbc7adb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e2c6a2f18902ba1d3abcb7c1c57f947fb500e96ba8783bbfb02ec9050f69de9b
[INFO] running `Command { std: "docker" "start" "-a" "e2c6a2f18902ba1d3abcb7c1c57f947fb500e96ba8783bbfb02ec9050f69de9b", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]     Checking unicode-xid v0.0.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking quote v0.3.15
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking sha1 v0.3.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking if_chain v0.1.3
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking synom v0.11.3
[INFO] [stderr]     Checking syn v0.11.11
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking intercom-common v0.2.0
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]  Documenting intercom-utils v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_trait)]
[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 `intercom-utils`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name intercom_utils 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 clap=/opt/rustwide/target/debug/deps/libclap-d6db9be6da54064e.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-75065ba5cc94e6ed.rmeta --extern if_chain=/opt/rustwide/target/debug/deps/libif_chain-c9ab29041ebcc0ac.rmeta --extern intercom_common=/opt/rustwide/target/debug/deps/libintercom_common-c16296568884b936.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-d39a4b97ad210b91.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-dc0a92f3574d8630.rmeta --cap-lints=warn --crate-version 0.2.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e2c6a2f18902ba1d3abcb7c1c57f947fb500e96ba8783bbfb02ec9050f69de9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2c6a2f18902ba1d3abcb7c1c57f947fb500e96ba8783bbfb02ec9050f69de9b", kill_on_drop: false }`
[INFO] [stdout] e2c6a2f18902ba1d3abcb7c1c57f947fb500e96ba8783bbfb02ec9050f69de9b
