[INFO] fetching crate serde-feature-hack 0.2.1...
[INFO] documenting serde-feature-hack-0.2.1 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate serde-feature-hack 0.2.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate serde-feature-hack 0.2.1 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 serde-feature-hack 0.2.1
[INFO] finished tweaking crates.io crate serde-feature-hack 0.2.1
[INFO] tweaked toml for crates.io crate serde-feature-hack 0.2.1 written to /workspace/builds/worker-12/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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] fb22e4b5020c4e7f4145d723c062c9ce787c771ce572b7a9f9a15e344b61eabc
[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" "fb22e4b5020c4e7f4145d723c062c9ce787c771ce572b7a9f9a15e344b61eabc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb22e4b5020c4e7f4145d723c062c9ce787c771ce572b7a9f9a15e344b61eabc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb22e4b5020c4e7f4145d723c062c9ce787c771ce572b7a9f9a15e344b61eabc", kill_on_drop: false }`
[INFO] [stdout] fb22e4b5020c4e7f4145d723c062c9ce787c771ce572b7a9f9a15e344b61eabc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e32e91f6745af1982b7143da39fc867ea4cfddad9d15613027c8b4098b338f84
[INFO] running `Command { std: "docker" "start" "-a" "e32e91f6745af1982b7143da39fc867ea4cfddad9d15613027c8b4098b338f84", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]  Documenting serde-feature-hack v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.94s
[INFO] running `Command { std: "docker" "inspect" "e32e91f6745af1982b7143da39fc867ea4cfddad9d15613027c8b4098b338f84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e32e91f6745af1982b7143da39fc867ea4cfddad9d15613027c8b4098b338f84", kill_on_drop: false }`
[INFO] [stdout] e32e91f6745af1982b7143da39fc867ea4cfddad9d15613027c8b4098b338f84
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 9de55b65a79b8824575c31ddd30c1c2efeea7b83902c3c0cda2859c98b5bc475
[INFO] running `Command { std: "docker" "start" "-a" "9de55b65a79b8824575c31ddd30c1c2efeea7b83902c3c0cda2859c98b5bc475", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]  Documenting serde-feature-hack v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.32s
[INFO] running `Command { std: "docker" "inspect" "9de55b65a79b8824575c31ddd30c1c2efeea7b83902c3c0cda2859c98b5bc475", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9de55b65a79b8824575c31ddd30c1c2efeea7b83902c3c0cda2859c98b5bc475", kill_on_drop: false }`
[INFO] [stdout] 9de55b65a79b8824575c31ddd30c1c2efeea7b83902c3c0cda2859c98b5bc475