[INFO] fetching crate cargo-external-doc 0.2.0...
[INFO] documenting cargo-external-doc-0.2.0 against 1.75.0 for beta-1.76-rustdoc-2
[INFO] extracting crate cargo-external-doc 0.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate cargo-external-doc 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 cargo-external-doc 0.2.0
[INFO] finished tweaking crates.io crate cargo-external-doc 0.2.0
[INFO] tweaked toml for crates.io crate cargo-external-doc 0.2.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate cargo-external-doc 0.2.0 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tempfile v2.2.0
[INFO] [stderr]   Downloaded walkdir v2.2.9
[INFO] [stderr]   Downloaded itoa v0.1.1
[INFO] [stderr]   Downloaded dtoa v0.2.2
[INFO] [stderr]   Downloaded winapi-util v0.1.2
[INFO] [stderr]   Downloaded cfg-if v0.1.2
[INFO] [stderr]   Downloaded serde_json v0.8.6
[INFO] [stderr]   Downloaded num-traits v0.1.43
[INFO] [stderr]   Downloaded redox_syscall v0.1.37
[INFO] [stderr]   Downloaded log v0.3.9
[INFO] [stderr]   Downloaded handlebars v0.22.0
[INFO] [stderr]   Downloaded log v0.4.1
[INFO] [stderr]   Downloaded num-traits v0.2.1
[INFO] [stderr]   Downloaded quick-error v1.2.1
[INFO] [stderr]   Downloaded libc v0.2.39
[INFO] [stderr]   Downloaded winapi v0.3.4
[INFO] [stderr]   Downloaded same-file v1.0.5
[INFO] [stderr]   Downloaded rand v0.3.22
[INFO] [stderr]   Downloaded serde v0.8.23
[INFO] [stderr]   Downloaded bitflags v1.0.1
[INFO] [stderr]   Downloaded pest v0.3.3
[INFO] [stderr]   Downloaded rand v0.4.2
[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] 0c2389c776f3804b3c065c2cf36b5f3481781ae7ca66f4d1fedb3d98eb966afe
[INFO] running `Command { std: "docker" "start" "-a" "0c2389c776f3804b3c065c2cf36b5f3481781ae7ca66f4d1fedb3d98eb966afe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c2389c776f3804b3c065c2cf36b5f3481781ae7ca66f4d1fedb3d98eb966afe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c2389c776f3804b3c065c2cf36b5f3481781ae7ca66f4d1fedb3d98eb966afe", kill_on_drop: false }`
[INFO] [stdout] 0c2389c776f3804b3c065c2cf36b5f3481781ae7ca66f4d1fedb3d98eb966afe
[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] fc3dd00a01a437d8e3900539283920b87011d6574bae22dcd9042edfd869f963
[INFO] running `Command { std: "docker" "start" "-a" "fc3dd00a01a437d8e3900539283920b87011d6574bae22dcd9042edfd869f963", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.39
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking num-traits v0.2.1
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking quick-error v1.2.1
[INFO] [stderr]     Checking itoa v0.1.1
[INFO] [stderr]     Checking same-file v1.0.5
[INFO] [stderr]     Checking dtoa v0.2.2
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]     Checking pest v0.3.3
[INFO] [stderr]     Checking walkdir v2.2.9
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking tempfile v2.2.0
[INFO] [stderr]     Checking handlebars v0.22.0
[INFO] [stderr]     Checking serde_json v0.8.6
[INFO] [stderr]  Documenting cargo-external-doc v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.01s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]    Generated /opt/rustwide/target/doc/cargo_external_doc/index.html
[INFO] running `Command { std: "docker" "inspect" "fc3dd00a01a437d8e3900539283920b87011d6574bae22dcd9042edfd869f963", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc3dd00a01a437d8e3900539283920b87011d6574bae22dcd9042edfd869f963", kill_on_drop: false }`
[INFO] [stdout] fc3dd00a01a437d8e3900539283920b87011d6574bae22dcd9042edfd869f963