[INFO] fetching crate exercise-sample 0.1.0...
[INFO] documenting exercise-sample-0.1.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate exercise-sample 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate exercise-sample 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 exercise-sample 0.1.0
[INFO] finished tweaking crates.io crate exercise-sample 0.1.0
[INFO] tweaked toml for crates.io crate exercise-sample 0.1.0 written to /workspace/builds/worker-6/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 048e5d212191a745178d5f6ec0ae5514b128961d9dfe423f03d7e57f187ad208
[INFO] running `Command { std: "docker" "start" "-a" "048e5d212191a745178d5f6ec0ae5514b128961d9dfe423f03d7e57f187ad208", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "048e5d212191a745178d5f6ec0ae5514b128961d9dfe423f03d7e57f187ad208", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "048e5d212191a745178d5f6ec0ae5514b128961d9dfe423f03d7e57f187ad208", kill_on_drop: false }`
[INFO] [stdout] 048e5d212191a745178d5f6ec0ae5514b128961d9dfe423f03d7e57f187ad208
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 4475a4f1cd7f3d87b9ef4f7daa545c5faddf0eeed7c376edec26fed3b87b1765
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4475a4f1cd7f3d87b9ef4f7daa545c5faddf0eeed7c376edec26fed3b87b1765", kill_on_drop: false }`
[INFO] [stderr]  Documenting exercise-sample v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.08s
[INFO] running `Command { std: "docker" "inspect" "4475a4f1cd7f3d87b9ef4f7daa545c5faddf0eeed7c376edec26fed3b87b1765", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4475a4f1cd7f3d87b9ef4f7daa545c5faddf0eeed7c376edec26fed3b87b1765", kill_on_drop: false }`
[INFO] [stdout] 4475a4f1cd7f3d87b9ef4f7daa545c5faddf0eeed7c376edec26fed3b87b1765
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6cc284d1d506bc98bf5293dc4eecb11aff39cf7522da63b02bd7cb580f044fbe
[INFO] running `Command { std: "docker" "start" "-a" "6cc284d1d506bc98bf5293dc4eecb11aff39cf7522da63b02bd7cb580f044fbe", kill_on_drop: false }`
[INFO] [stderr]  Documenting exercise-sample v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.97s
[INFO] running `Command { std: "docker" "inspect" "6cc284d1d506bc98bf5293dc4eecb11aff39cf7522da63b02bd7cb580f044fbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cc284d1d506bc98bf5293dc4eecb11aff39cf7522da63b02bd7cb580f044fbe", kill_on_drop: false }`
[INFO] [stdout] 6cc284d1d506bc98bf5293dc4eecb11aff39cf7522da63b02bd7cb580f044fbe