[INFO] fetching crate merklebtree 0.1.5...
[INFO] documenting merklebtree-0.1.5 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate merklebtree 0.1.5 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate merklebtree 0.1.5 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 merklebtree 0.1.5
[INFO] finished tweaking crates.io crate merklebtree 0.1.5
[INFO] tweaked toml for crates.io crate merklebtree 0.1.5 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate merklebtree 0.1.5 already has a lockfile, it will not be regenerated
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded web-sys v0.3.29
[INFO] [stderr]   Downloaded wasm-bindgen-webidl v0.2.52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] ad0217a69249d1b721c4a01906a16f4643e41f014629297e683d1665a101d9a7
[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" "ad0217a69249d1b721c4a01906a16f4643e41f014629297e683d1665a101d9a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad0217a69249d1b721c4a01906a16f4643e41f014629297e683d1665a101d9a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad0217a69249d1b721c4a01906a16f4643e41f014629297e683d1665a101d9a7", kill_on_drop: false }`
[INFO] [stdout] ad0217a69249d1b721c4a01906a16f4643e41f014629297e683d1665a101d9a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b28771a8f9685884334f4b74af8aaf5a7299b263bb48079857572d90001f1bd5
[INFO] running `Command { std: "docker" "start" "-a" "b28771a8f9685884334f4b74af8aaf5a7299b263bb48079857572d90001f1bd5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling ring v0.16.9
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]  Documenting merklebtree v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/node.rs:352:8
[INFO] [stdout]     |
[INFO] [stdout] 352 |     if (node_id == -1) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `position` should have an upper camel case name
[INFO] [stdout]  --> src/iterator.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum position {
[INFO] [stdout]   |          ^^^^^^^^ help: convert the identifier to upper camel case: `Position`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `begin` should have an upper camel case name
[INFO] [stdout]  --> src/iterator.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     begin,
[INFO] [stdout]   |     ^^^^^ help: convert the identifier to upper camel case: `Begin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `between` should have an upper camel case name
[INFO] [stdout]  --> src/iterator.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     between,
[INFO] [stdout]   |     ^^^^^^^ help: convert the identifier to upper camel case: `Between`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `end` should have an upper camel case name
[INFO] [stdout]   --> src/iterator.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     end,
[INFO] [stdout]    |     ^^^ help: convert the identifier to upper camel case: `End`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `btree_iterator` should have an upper camel case name
[INFO] [stdout]   --> src/iterator.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct btree_iterator<'a, T>
[INFO] [stdout]    |            ^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `BtreeIterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/sgxdb.rs:352:8
[INFO] [stdout]     |
[INFO] [stdout] 352 |     if (node_id == -1) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.30s
[INFO] running `Command { std: "docker" "inspect" "b28771a8f9685884334f4b74af8aaf5a7299b263bb48079857572d90001f1bd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b28771a8f9685884334f4b74af8aaf5a7299b263bb48079857572d90001f1bd5", kill_on_drop: false }`
[INFO] [stdout] b28771a8f9685884334f4b74af8aaf5a7299b263bb48079857572d90001f1bd5