[INFO] fetching crate zkp-merkle-tree 0.1.0...
[INFO] documenting zkp-merkle-tree-0.1.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate zkp-merkle-tree 0.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate zkp-merkle-tree 0.1.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zkp-merkle-tree 0.1.0
[INFO] finished tweaking crates.io crate zkp-merkle-tree 0.1.0
[INFO] tweaked toml for crates.io crate zkp-merkle-tree 0.1.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6c8ff3fa338b1bd3479df402f82b748a8ee42f79504dddaa4cd726f7b79aea17
[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" "6c8ff3fa338b1bd3479df402f82b748a8ee42f79504dddaa4cd726f7b79aea17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6c8ff3fa338b1bd3479df402f82b748a8ee42f79504dddaa4cd726f7b79aea17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c8ff3fa338b1bd3479df402f82b748a8ee42f79504dddaa4cd726f7b79aea17", kill_on_drop: false }`
[INFO] [stdout] 6c8ff3fa338b1bd3479df402f82b748a8ee42f79504dddaa4cd726f7b79aea17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f99ab3af5f4e6e64036bd53d73b1b5e728398109370f3eed14082821e24a64f
[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" "0f99ab3af5f4e6e64036bd53d73b1b5e728398109370f3eed14082821e24a64f", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling hex v0.4.2
[INFO] [stderr]     Checking either v1.6.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling rayon-core v1.8.0
[INFO] [stderr]     Checking no-std-compat v0.1.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking zkp-error-utils v0.1.0
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking tiny-keccak v1.5.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling rayon v1.4.0
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking zkp-mmap-vec v0.1.0
[INFO] [stderr]    Compiling zkp-macros-lib v0.1.0
[INFO] [stderr]    Compiling zkp-macros-impl v0.1.0
[INFO] [stderr]     Checking zkp-macros-decl v0.1.0
[INFO] [stderr]     Checking zkp-u256 v0.1.1
[INFO] [stderr]     Checking zkp-primefield v0.1.1
[INFO] [stderr]     Checking zkp-hash v0.1.0
[INFO] [stderr]  Documenting zkp-merkle-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/proof.rs:48:17
[INFO] [stdout]    |
[INFO] [stdout] 48 | /                 (Index::from_size_offset(self.commitment.size(), *index)
[INFO] [stdout] 49 | |                     .map(|index| (index, leaf.hash())))
[INFO] [stdout]    | |_______________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     unused,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    = note: `#[warn(unused_parens)]` implied by `#[warn(unused)]`
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 48 |                 Index::from_size_offset(self.commitment.size(), *index)
[INFO] [stdout] 49 |                     .map(|index| (index, leaf.hash()))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: documentation test in private item
[INFO] [stdout]   --> src/index.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | / /// Index into a balanced binary tree
[INFO] [stdout] 11 | | ///
[INFO] [stdout] 12 | | /// The index has two representations, as a (depth, offset) pair and as an
[INFO] [stdout] 13 | | /// index.
[INFO] [stdout] ...  |
[INFO] [stdout] 29 | | /// and nodes in the tree. Nodes are indexed in breadth-first order, starting
[INFO] [stdout] 30 | | /// with the root at 0.
[INFO] [stdout]    | |_______________________^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     private_doc_tests,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.73s
[INFO] running `Command { std: "docker" "inspect" "0f99ab3af5f4e6e64036bd53d73b1b5e728398109370f3eed14082821e24a64f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f99ab3af5f4e6e64036bd53d73b1b5e728398109370f3eed14082821e24a64f", kill_on_drop: false }`
[INFO] [stdout] 0f99ab3af5f4e6e64036bd53d73b1b5e728398109370f3eed14082821e24a64f