[INFO] cloning repository https://github.com/yxxx5/leetcode_rusrt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yxxx5/leetcode_rusrt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyxxx5%2Fleetcode_rusrt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyxxx5%2Fleetcode_rusrt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 31eca0197ae14438fed9f6280b93bbc4ecc26e9b
[INFO] documenting yxxx5/leetcode_rusrt against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyxxx5%2Fleetcode_rusrt" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yxxx5/leetcode_rusrt on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yxxx5/leetcode_rusrt
[INFO] finished tweaking git repo https://github.com/yxxx5/leetcode_rusrt
[INFO] tweaked toml for git repo https://github.com/yxxx5/leetcode_rusrt written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/yxxx5/leetcode_rusrt already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-6/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff2383e4258bc831d97c8d13dff215e79c74d2ba39a56e9d3857ec94434a7388
[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" "ff2383e4258bc831d97c8d13dff215e79c74d2ba39a56e9d3857ec94434a7388", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff2383e4258bc831d97c8d13dff215e79c74d2ba39a56e9d3857ec94434a7388", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff2383e4258bc831d97c8d13dff215e79c74d2ba39a56e9d3857ec94434a7388", kill_on_drop: false }`
[INFO] [stdout] ff2383e4258bc831d97c8d13dff215e79c74d2ba39a56e9d3857ec94434a7388
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bc2ad68c4ec6ef49810d286a92f41b28a98ec18da344a9c2ecbd390912edbc6
[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" "2bc2ad68c4ec6ef49810d286a92f41b28a98ec18da344a9c2ecbd390912edbc6", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling leetcode_test v0.1.2
[INFO] [stderr]     Checking leetcode_prelude v0.2.3
[INFO] [stderr]  Documenting leetcode_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `makeRcTree` should have a snake case name
[INFO] [stdout]   --> src/merge_trees/mod.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn makeRcTree(val:i32) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stdout]    |        ^^^^^^^^^^ help: convert the identifier to snake case: `make_rc_tree`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `treeLen` should have a snake case name
[INFO] [stdout]   --> src/kth_smallest_element_in_a_bst/mod.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn treeLen(root: Option<Rc<RefCell<TreeNode>>>) -> i32{
[INFO] [stdout]    |    ^^^^^^^ help: convert the identifier to snake case: `tree_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.18s
[INFO] running `Command { std: "docker" "inspect" "2bc2ad68c4ec6ef49810d286a92f41b28a98ec18da344a9c2ecbd390912edbc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bc2ad68c4ec6ef49810d286a92f41b28a98ec18da344a9c2ecbd390912edbc6", kill_on_drop: false }`
[INFO] [stdout] 2bc2ad68c4ec6ef49810d286a92f41b28a98ec18da344a9c2ecbd390912edbc6