[INFO] fetching crate cat-ascii-faces 0.1.4...
[INFO] documenting cat-ascii-faces-0.1.4 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate cat-ascii-faces 0.1.4 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate cat-ascii-faces 0.1.4 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 cat-ascii-faces 0.1.4
[INFO] finished tweaking crates.io crate cat-ascii-faces 0.1.4
[INFO] tweaked toml for crates.io crate cat-ascii-faces 0.1.4 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate cat-ascii-faces 0.1.4 already has a lockfile, it will not be regenerated
[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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tinyrand v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 8387a9db32c8a8e3f2dd2f0ef531cd25ce95f026e40631cca4a6688fcf29d55a
[INFO] running `Command { std: "docker" "start" "-a" "8387a9db32c8a8e3f2dd2f0ef531cd25ce95f026e40631cca4a6688fcf29d55a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8387a9db32c8a8e3f2dd2f0ef531cd25ce95f026e40631cca4a6688fcf29d55a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8387a9db32c8a8e3f2dd2f0ef531cd25ce95f026e40631cca4a6688fcf29d55a", kill_on_drop: false }`
[INFO] [stdout] 8387a9db32c8a8e3f2dd2f0ef531cd25ce95f026e40631cca4a6688fcf29d55a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 531cc646b8a0d7fd86d57a3de44148548dbbbe3fe757778871d634abbf57466d
[INFO] running `Command { std: "docker" "start" "-a" "531cc646b8a0d7fd86d57a3de44148548dbbbe3fe757778871d634abbf57466d", kill_on_drop: false }`
[INFO] [stderr]     Checking tinyrand v0.5.0
[INFO] [stderr]  Documenting cat-ascii-faces v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking cat-ascii-faces v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(let_chains)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `cat-ascii-faces`
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type bin --crate-name cargo_cat 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=adc6dd4604d1b184 -L dependency=/opt/rustwide/target/debug/deps --extern cat_ascii_faces=/opt/rustwide/target/debug/deps/libcat_ascii_faces-7c7657baad83a9a7.rmeta --extern tinyrand=/opt/rustwide/target/debug/deps/libtinyrand-2e33291392a42db4.rmeta --cap-lints=warn --crate-version 0.1.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "531cc646b8a0d7fd86d57a3de44148548dbbbe3fe757778871d634abbf57466d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "531cc646b8a0d7fd86d57a3de44148548dbbbe3fe757778871d634abbf57466d", kill_on_drop: false }`
[INFO] [stdout] 531cc646b8a0d7fd86d57a3de44148548dbbbe3fe757778871d634abbf57466d
