[INFO] fetching crate lineup 1.0.0...
[INFO] documenting lineup-1.0.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate lineup 1.0.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate lineup 1.0.0 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 lineup 1.0.0
[INFO] finished tweaking crates.io crate lineup 1.0.0
[INFO] tweaked toml for crates.io crate lineup 1.0.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate lineup 1.0.0 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]  Downloading crates ...
[INFO] [stderr]   Downloaded darling_core v0.14.2
[INFO] [stderr]   Downloaded darling_macro v0.14.2
[INFO] [stderr]   Downloaded darling v0.14.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 073873759a2af58f1fb7a0975877d149e9b3455828eadb6c1b4518ac79b539f7
[INFO] running `Command { std: "docker" "start" "-a" "073873759a2af58f1fb7a0975877d149e9b3455828eadb6c1b4518ac79b539f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "073873759a2af58f1fb7a0975877d149e9b3455828eadb6c1b4518ac79b539f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "073873759a2af58f1fb7a0975877d149e9b3455828eadb6c1b4518ac79b539f7", kill_on_drop: false }`
[INFO] [stdout] 073873759a2af58f1fb7a0975877d149e9b3455828eadb6c1b4518ac79b539f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 551e8d811ceef2a051e0e8180a650c4ba0afef71078a95a90542dc38185be1e0
[INFO] running `Command { std: "docker" "start" "-a" "551e8d811ceef2a051e0e8180a650c4ba0afef71078a95a90542dc38185be1e0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking os_str_bytes v6.4.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking once_cell v1.16.0
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking clap_lex v0.3.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling darling_core v0.14.2
[INFO] [stderr]    Compiling clap_derive v4.0.21
[INFO] [stderr]    Compiling derive-new v0.5.9
[INFO] [stderr]    Compiling darling_macro v0.14.2
[INFO] [stderr]    Compiling darling v0.14.2
[INFO] [stderr]    Compiling derive_builder_core v0.11.2
[INFO] [stderr]     Checking clap v4.0.22
[INFO] [stderr]    Compiling derive_builder_macro v0.11.2
[INFO] [stderr]     Checking derive_builder v0.11.2
[INFO] [stderr]  Documenting lineup v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(let_chains)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 `lineup`
[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 --edition=2021 --crate-type lib --crate-name lineup src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=d141a9fe2a6a5f93 -L dependency=/opt/rustwide/target/debug/deps --extern clap=/opt/rustwide/target/debug/deps/libclap-5b51a59a3a8987ea.rmeta --extern derive_new=/opt/rustwide/target/debug/deps/libderive_new-3ce69250e45f753f.so --extern derive_builder=/opt/rustwide/target/debug/deps/libderive_builder-711f1143dc726962.rmeta --cap-lints=warn --crate-version 1.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "551e8d811ceef2a051e0e8180a650c4ba0afef71078a95a90542dc38185be1e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "551e8d811ceef2a051e0e8180a650c4ba0afef71078a95a90542dc38185be1e0", kill_on_drop: false }`
[INFO] [stdout] 551e8d811ceef2a051e0e8180a650c4ba0afef71078a95a90542dc38185be1e0
