[INFO] fetching crate nag-toolkit 0.1.0...
[INFO] documenting nag-toolkit-0.1.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate nag-toolkit 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate nag-toolkit 0.1.0 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 nag-toolkit 0.1.0
[INFO] finished tweaking crates.io crate nag-toolkit 0.1.0
[INFO] tweaked toml for crates.io crate nag-toolkit 0.1.0 written to /workspace/builds/worker-6-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]     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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] babcbd58c7a9e3d58a2165118e409225d639b562feb0c0fec6f0c800e44b07bf
[INFO] running `Command { std: "docker" "start" "-a" "babcbd58c7a9e3d58a2165118e409225d639b562feb0c0fec6f0c800e44b07bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "babcbd58c7a9e3d58a2165118e409225d639b562feb0c0fec6f0c800e44b07bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "babcbd58c7a9e3d58a2165118e409225d639b562feb0c0fec6f0c800e44b07bf", kill_on_drop: false }`
[INFO] [stdout] babcbd58c7a9e3d58a2165118e409225d639b562feb0c0fec6f0c800e44b07bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 27c999c0b2cdd1d4ccff24f955c932238d186e8792d9fcd6680b16cf036cd8dd
[INFO] running `Command { std: "docker" "start" "-a" "27c999c0b2cdd1d4ccff24f955c932238d186e8792d9fcd6680b16cf036cd8dd", kill_on_drop: false }`
[INFO] [stderr]  Documenting nag-toolkit v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `rustc_middle`
[INFO] [stdout]   --> src/lib.rs:49:1
[INFO] [stdout]    |
[INFO] [stdout] 49 | extern crate rustc_middle;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe you need to install the missing components with: `rustup component add rust-src rustc-dev llvm-tools-preview`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:47:1
[INFO] [stdout]    |
[INFO] [stdout] 47 | #![feature(rustc_private)]
[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: E0463, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `nag-toolkit`
[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 nag_toolkit src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=71ea0eda35cda156 -L dependency=/opt/rustwide/target/debug/deps --extern paste=/opt/rustwide/target/debug/deps/libpaste-5d8b8ccb77a64e55.so --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "27c999c0b2cdd1d4ccff24f955c932238d186e8792d9fcd6680b16cf036cd8dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27c999c0b2cdd1d4ccff24f955c932238d186e8792d9fcd6680b16cf036cd8dd", kill_on_drop: false }`
[INFO] [stdout] 27c999c0b2cdd1d4ccff24f955c932238d186e8792d9fcd6680b16cf036cd8dd
