[INFO] cloning repository https://github.com/nuclearpesto/rust-binary-tree [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nuclearpesto/rust-binary-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnuclearpesto%2Frust-binary-tree", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnuclearpesto%2Frust-binary-tree'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] e03f93f02462e0ed812e0d43f525598f29b072aa [INFO] documenting nuclearpesto/rust-binary-tree 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%2Fnuclearpesto%2Frust-binary-tree" "/workspace/builds/worker-7/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/nuclearpesto/rust-binary-tree 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/nuclearpesto/rust-binary-tree [INFO] finished tweaking git repo https://github.com/nuclearpesto/rust-binary-tree [INFO] tweaked toml for git repo https://github.com/nuclearpesto/rust-binary-tree written to /workspace/builds/worker-7/source/Cargo.toml [INFO] crate git repo https://github.com/nuclearpesto/rust-binary-tree 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 6362f58778619998b1b1a39f454df84280d527987d4b653999354ad3b8b56791 [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" "6362f58778619998b1b1a39f454df84280d527987d4b653999354ad3b8b56791", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "6362f58778619998b1b1a39f454df84280d527987d4b653999354ad3b8b56791", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6362f58778619998b1b1a39f454df84280d527987d4b653999354ad3b8b56791", kill_on_drop: false }` [INFO] [stdout] 6362f58778619998b1b1a39f454df84280d527987d4b653999354ad3b8b56791 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 35aeab003fa725f3943ea47832f70b17f3fb4ca2f006103cbf8771d56edd1b59 [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" "35aeab003fa725f3943ea47832f70b17f3fb4ca2f006103cbf8771d56edd1b59", kill_on_drop: false }` [INFO] [stderr] Documenting binarytree v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unnecessary parentheses around type [INFO] [stdout] --> src/main.rs:28:62 [INFO] [stdout] | [INFO] [stdout] 28 | pub fn insert(tree: &Option>, key: &str) -> (Option>) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around type [INFO] [stdout] --> src/main.rs:35:51 [INFO] [stdout] | [INFO] [stdout] 35 | fn clone_node(node: &Option>) -> (Option>) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around type [INFO] [stdout] --> src/main.rs:41:35 [INFO] [stdout] | [INFO] [stdout] 41 | fn new_leaf(key: &str) -> (Option>) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around type [INFO] [stdout] --> src/main.rs:49:55 [INFO] [stdout] | [INFO] [stdout] 49 | fn tree_by_key(tree: &Rc, key: &str) -> (Option>) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.39s [INFO] running `Command { std: "docker" "inspect" "35aeab003fa725f3943ea47832f70b17f3fb4ca2f006103cbf8771d56edd1b59", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "35aeab003fa725f3943ea47832f70b17f3fb4ca2f006103cbf8771d56edd1b59", kill_on_drop: false }` [INFO] [stdout] 35aeab003fa725f3943ea47832f70b17f3fb4ca2f006103cbf8771d56edd1b59