[INFO] cloning repository https://github.com/darwinia-network/sparse-merkle-tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/darwinia-network/sparse-merkle-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdarwinia-network%2Fsparse-merkle-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdarwinia-network%2Fsparse-merkle-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 704fd346aa1a2190a58c124e9beda5a2b756ae4f
[INFO] documenting darwinia-network/sparse-merkle-tree against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdarwinia-network%2Fsparse-merkle-tree" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/darwinia-network/sparse-merkle-tree on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/darwinia-network/sparse-merkle-tree
[INFO] finished tweaking git repo https://github.com/darwinia-network/sparse-merkle-tree
[INFO] tweaked toml for git repo https://github.com/darwinia-network/sparse-merkle-tree written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/darwinia-network/sparse-merkle-tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 14227d0497b8dee6137d60e542937dcf4cfa1962226bd8070ef8cc49adde2cb0
[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" "14227d0497b8dee6137d60e542937dcf4cfa1962226bd8070ef8cc49adde2cb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14227d0497b8dee6137d60e542937dcf4cfa1962226bd8070ef8cc49adde2cb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14227d0497b8dee6137d60e542937dcf4cfa1962226bd8070ef8cc49adde2cb0", kill_on_drop: false }`
[INFO] [stdout] 14227d0497b8dee6137d60e542937dcf4cfa1962226bd8070ef8cc49adde2cb0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2022-05-20" "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] 5b647092a3d27bde223313abbc7b3a8944f7a36ec3170c5b176febc6b71a75bd
[INFO] running `Command { std: "docker" "start" "-a" "5b647092a3d27bde223313abbc7b3a8944f7a36ec3170c5b176febc6b71a75bd", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]  Documenting tiny-sparse-merkle-tree v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unresolved link to `SparseMerkleRoot::proof_of`
[INFO] [stdout]    --> src/lib.rs:251:47
[INFO] [stdout]     |
[INFO] [stdout] 251 |     /// Pass the `indices` in descend order to [`SparseMerkleRoot::proof_of`],
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ no item named `SparseMerkleRoot` in scope
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.91s
[INFO] running `Command { std: "docker" "inspect" "5b647092a3d27bde223313abbc7b3a8944f7a36ec3170c5b176febc6b71a75bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b647092a3d27bde223313abbc7b3a8944f7a36ec3170c5b176febc6b71a75bd", kill_on_drop: false }`
[INFO] [stdout] 5b647092a3d27bde223313abbc7b3a8944f7a36ec3170c5b176febc6b71a75bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2022-05-20" "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] c0c827ffe610f11acaf9d617802734a888c436535699a0f1baac47b2809f107f
[INFO] running `Command { std: "docker" "start" "-a" "c0c827ffe610f11acaf9d617802734a888c436535699a0f1baac47b2809f107f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]  Documenting tiny-sparse-merkle-tree v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unresolved link to `SparseMerkleRoot::proof_of`
[INFO] [stdout]    --> src/lib.rs:251:47
[INFO] [stdout]     |
[INFO] [stdout] 251 |     /// Pass the `indices` in descend order to [`SparseMerkleRoot::proof_of`],
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ no item named `SparseMerkleRoot` in scope
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.21s
[INFO] running `Command { std: "docker" "inspect" "c0c827ffe610f11acaf9d617802734a888c436535699a0f1baac47b2809f107f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0c827ffe610f11acaf9d617802734a888c436535699a0f1baac47b2809f107f", kill_on_drop: false }`
[INFO] [stdout] c0c827ffe610f11acaf9d617802734a888c436535699a0f1baac47b2809f107f