[INFO] fetching crate classgroup 0.1.0...
[INFO] documenting classgroup-0.1.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate classgroup 0.1.0 into /workspace/builds/worker-54/source
[INFO] validating manifest of crates.io crate classgroup 0.1.0 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate classgroup 0.1.0
[INFO] finished tweaking crates.io crate classgroup 0.1.0
[INFO] tweaked toml for crates.io crate classgroup 0.1.0 written to /workspace/builds/worker-54/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a5bd92492f45d9f8b17b9eda4052e079e3995f79e617bb64c8bc8cd33cd1eaad
[INFO] running `Command { std: "docker" "start" "-a" "a5bd92492f45d9f8b17b9eda4052e079e3995f79e617bb64c8bc8cd33cd1eaad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5bd92492f45d9f8b17b9eda4052e079e3995f79e617bb64c8bc8cd33cd1eaad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5bd92492f45d9f8b17b9eda4052e079e3995f79e617bb64c8bc8cd33cd1eaad", kill_on_drop: false }`
[INFO] [stdout] a5bd92492f45d9f8b17b9eda4052e079e3995f79e617bb64c8bc8cd33cd1eaad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2dd32aed32445a296a5ff4b46cbc66b7fc27011b894d2dff2a4b02af31b9b91d
[INFO] running `Command { std: "docker" "start" "-a" "2dd32aed32445a296a5ff4b46cbc66b7fc27011b894d2dff2a4b02af31b9b91d", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]  Documenting classgroup v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.10s
[INFO] running `Command { std: "docker" "inspect" "2dd32aed32445a296a5ff4b46cbc66b7fc27011b894d2dff2a4b02af31b9b91d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dd32aed32445a296a5ff4b46cbc66b7fc27011b894d2dff2a4b02af31b9b91d", kill_on_drop: false }`
[INFO] [stdout] 2dd32aed32445a296a5ff4b46cbc66b7fc27011b894d2dff2a4b02af31b9b91d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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" "RUSTC_BOOTSTRAP=1" "-e" "DOCS_RS=1" "-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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] b5ab4d91f9ed6de41d4a2336efd86c554ea831871510024c269db222f0ff6930
[INFO] running `Command { std: "docker" "start" "-a" "b5ab4d91f9ed6de41d4a2336efd86c554ea831871510024c269db222f0ff6930", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]  Documenting classgroup v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.45s
[INFO] running `Command { std: "docker" "inspect" "b5ab4d91f9ed6de41d4a2336efd86c554ea831871510024c269db222f0ff6930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5ab4d91f9ed6de41d4a2336efd86c554ea831871510024c269db222f0ff6930", kill_on_drop: false }`
[INFO] [stdout] b5ab4d91f9ed6de41d4a2336efd86c554ea831871510024c269db222f0ff6930