[INFO] fetching crate intercom-utils 0.2.0...
[INFO] documenting intercom-utils-0.2.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate intercom-utils 0.2.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate intercom-utils 0.2.0 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "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-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded intercom-common v0.2.0
[INFO] [stderr]   Downloaded sha1 v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6a1b2911f9609c2c3f56732523579c9a87902346c8d47743af396eec19370cf1
[INFO] running `Command { std: "docker" "start" "-a" "6a1b2911f9609c2c3f56732523579c9a87902346c8d47743af396eec19370cf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a1b2911f9609c2c3f56732523579c9a87902346c8d47743af396eec19370cf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a1b2911f9609c2c3f56732523579c9a87902346c8d47743af396eec19370cf1", kill_on_drop: false }`
[INFO] [stdout] 6a1b2911f9609c2c3f56732523579c9a87902346c8d47743af396eec19370cf1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09986f534441ec4c662b6f05e046a8d92a18f2d51a305e839f45a25b6ffe2a10
[INFO] running `Command { std: "docker" "start" "-a" "09986f534441ec4c662b6f05e046a8d92a18f2d51a305e839f45a25b6ffe2a10", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]     Checking unicode-xid v0.0.4
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]     Checking quote v0.3.15
[INFO] [stderr]     Checking sha1 v0.3.0
[INFO] [stderr]     Checking if_chain v0.1.3
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking synom v0.11.3
[INFO] [stderr]     Checking syn v0.11.11
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.34.0
[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 stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_trait)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `try_trait`
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_trait)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an 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: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --crate-type bin --crate-name intercom_utils src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=0c417d7e647773e2 -L dependency=/opt/rustwide/target/debug/deps --extern clap=/opt/rustwide/target/debug/deps/libclap-ed1cb72846951241.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-8f2095d171dc7344.rmeta --extern if_chain=/opt/rustwide/target/debug/deps/libif_chain-2cc501071ca21d8f.rmeta --extern intercom_common=/opt/rustwide/target/debug/deps/libintercom_common-69b2252104cbf9f8.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-7bf16c1b1fb6dea6.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-c9cfb73ac1b52ec4.rmeta --cap-lints=warn --crate-version 0.2.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "09986f534441ec4c662b6f05e046a8d92a18f2d51a305e839f45a25b6ffe2a10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09986f534441ec4c662b6f05e046a8d92a18f2d51a305e839f45a25b6ffe2a10", kill_on_drop: false }`
[INFO] [stdout] 09986f534441ec4c662b6f05e046a8d92a18f2d51a305e839f45a25b6ffe2a10
