[INFO] cloning repository https://github.com/NavyD/leetcode-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NavyD/leetcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNavyD%2Fleetcode-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNavyD%2Fleetcode-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 388684fd22bb6237070005ed07c369abf2f25e7f
[INFO] documenting NavyD/leetcode-rust against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNavyD%2Fleetcode-rust" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NavyD/leetcode-rust 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 git repo https://github.com/NavyD/leetcode-rust
[INFO] finished tweaking git repo https://github.com/NavyD/leetcode-rust
[INFO] tweaked toml for git repo https://github.com/NavyD/leetcode-rust written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/NavyD/leetcode-rust 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]  Downloading crates ...
[INFO] [stderr]   Downloaded leetcode_prelude v0.2.3
[INFO] [stderr]   Downloaded leetcode_test v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 8626d3bbb2a3aae883f96e85faeddb3785bf19823af5413f37bf22630e6a8e34
[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" "8626d3bbb2a3aae883f96e85faeddb3785bf19823af5413f37bf22630e6a8e34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8626d3bbb2a3aae883f96e85faeddb3785bf19823af5413f37bf22630e6a8e34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8626d3bbb2a3aae883f96e85faeddb3785bf19823af5413f37bf22630e6a8e34", kill_on_drop: false }`
[INFO] [stdout] 8626d3bbb2a3aae883f96e85faeddb3785bf19823af5413f37bf22630e6a8e34
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 08af5aea5ea49de0054fb7ae7906853c58b18d7cee70de1c0df14aa71d8530a0
[INFO] running `Command { std: "docker" "start" "-a" "08af5aea5ea49de0054fb7ae7906853c58b18d7cee70de1c0df14aa71d8530a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[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: could not parse code block as Rust code
[INFO] [stdout]   --> src/minimum_depth_of_binary_tree.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |   //! ```ignore
[INFO] [stdout]    |  _____^
[INFO] [stdout] 12 | | //!     3
[INFO] [stdout] 13 | | //!    / \
[INFO] [stdout] 14 | | //!   9  20
[INFO] [stdout] 15 | | //!     /  \
[INFO] [stdout] 16 | | //!    15   7
[INFO] [stdout] 17 | | //! ```
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: could not parse code block as Rust code
[INFO] [stdout]   --> src/path_sum.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 9  |   //! ```ignore
[INFO] [stdout]    |  _____^
[INFO] [stdout] 10 | | //!       5
[INFO] [stdout] 11 | | //!      / \
[INFO] [stdout] 12 | | //!     4   8
[INFO] [stdout] ...  |
[INFO] [stdout] 16 | | //! 7    2      1
[INFO] [stdout] 17 | | //! ```
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: could not parse code block as Rust code
[INFO] [stdout]   --> src/invert_binary_tree.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 6  |   //! ```ignore
[INFO] [stdout]    |  _____^
[INFO] [stdout] 7  | | //!      4
[INFO] [stdout] 8  | | //!    /   \
[INFO] [stdout] 9  | | //!   2     7
[INFO] [stdout] 10 | | //!  / \   / \
[INFO] [stdout] 11 | | //! 1   3 6   9
[INFO] [stdout] 12 | | //! ```
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: could not parse code block as Rust code
[INFO] [stdout]   --> src/invert_binary_tree.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |   //! ```ignore
[INFO] [stdout]    |  _____^
[INFO] [stdout] 15 | | //!      4
[INFO] [stdout] 16 | | //!    /   \
[INFO] [stdout] 17 | | //!   7     2
[INFO] [stdout] 18 | | //!  / \   / \
[INFO] [stdout] 19 | | //! 9   6 3   1
[INFO] [stdout] 20 | | //! ```
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: could not parse code block as Rust code
[INFO] [stdout]   --> src/binary_tree_paths.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  |   //! ```ignore
[INFO] [stdout]    |  _____^
[INFO] [stdout] 9  | | //!    1
[INFO] [stdout] 10 | | //!  /   \
[INFO] [stdout] 11 | | //! 2     3
[INFO] [stdout] 12 | | //!  \
[INFO] [stdout] 13 | | //!   5
[INFO] [stdout] 14 | | //! ```
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: could not parse code block as Rust code
[INFO] [stdout]   --> src/sum_of_left_leaves.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  |   //! ```ignore
[INFO] [stdout]    |  _____^
[INFO] [stdout] 5  | | //!     3
[INFO] [stdout] 6  | | //!    / \
[INFO] [stdout] 7  | | //!   9  20
[INFO] [stdout] 8  | | //!     /  \
[INFO] [stdout] 9  | | //!    15   7
[INFO] [stdout] 10 | | //! ```
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout]    = note: error from rustc: unknown start of token: \
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: could not parse code block as Rust code
[INFO] [stdout]   --> src/merge_two_sorted_lists.rs:7:5
[INFO] [stdout]    |
[INFO] [stdout] 7  |   /// ```ignore
[INFO] [stdout]    |  _____^
[INFO] [stdout] 8  | | /// while let (Some(head1), Some(head2)) = (l1, l2) {
[INFO] [stdout] 9  | | /// }
[INFO] [stdout] 10 | | /// 
[INFO] [stdout] ...  |
[INFO] [stdout] 16 | | /// (None, l2) => l2,
[INFO] [stdout] 17 | | /// ```
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: error from rustc: unknown start of token: `
[INFO] [stdout]    = note: error from rustc: unknown start of token: `
[INFO] [stdout]    = note: error from rustc: unknown start of token: `
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.30s
[INFO] running `Command { std: "docker" "inspect" "08af5aea5ea49de0054fb7ae7906853c58b18d7cee70de1c0df14aa71d8530a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08af5aea5ea49de0054fb7ae7906853c58b18d7cee70de1c0df14aa71d8530a0", kill_on_drop: false }`
[INFO] [stdout] 08af5aea5ea49de0054fb7ae7906853c58b18d7cee70de1c0df14aa71d8530a0