[INFO] cloning repository https://github.com/sivakarasala/ds-algo-rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sivakarasala/ds-algo-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsivakarasala%2Fds-algo-rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsivakarasala%2Fds-algo-rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 140780dd9264836a7c5b28a5ce5bb479c1577575 [INFO] checking sivakarasala/ds-algo-rust against master#ca77504943887037504c7fc0b9bf06dab3910373 for pr-145181 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsivakarasala%2Fds-algo-rust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/sivakarasala/ds-algo-rust [INFO] finished tweaking git repo https://github.com/sivakarasala/ds-algo-rust [INFO] tweaked toml for git repo https://github.com/sivakarasala/ds-algo-rust written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/sivakarasala/ds-algo-rust on toolchain ca77504943887037504c7fc0b9bf06dab3910373 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ca77504943887037504c7fc0b9bf06dab3910373" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/sivakarasala/ds-algo-rust already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ca77504943887037504c7fc0b9bf06dab3910373" "fetch" "--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-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+ca77504943887037504c7fc0b9bf06dab3910373" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 469f97e7e8ce6b7ccfca1afb7f949d892b6ea0b9ebb3a29ae625680d7e8cea18 [INFO] running `Command { std: "docker" "start" "-a" "469f97e7e8ce6b7ccfca1afb7f949d892b6ea0b9ebb3a29ae625680d7e8cea18", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "469f97e7e8ce6b7ccfca1afb7f949d892b6ea0b9ebb3a29ae625680d7e8cea18", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "469f97e7e8ce6b7ccfca1afb7f949d892b6ea0b9ebb3a29ae625680d7e8cea18", kill_on_drop: false }` [INFO] [stdout] 469f97e7e8ce6b7ccfca1afb7f949d892b6ea0b9ebb3a29ae625680d7e8cea18 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+ca77504943887037504c7fc0b9bf06dab3910373" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 0a6696f1aced2f66a5db0ff209cdb590092643c7e89e525f637c553ef9f70e4a [INFO] running `Command { std: "docker" "start" "-a" "0a6696f1aced2f66a5db0ff209cdb590092643c7e89e525f637c553ef9f70e4a", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.139 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Checking ppv-lite86 v0.2.17 [INFO] [stderr] Checking getrandom v0.2.8 [INFO] [stderr] Checking rand_core v0.6.4 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking rand v0.8.5 [INFO] [stderr] Checking ds-algo-rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: type alias `SingleLink` is never used [INFO] [stdout] --> src/bin/c04p01_singly_linked_list.rs:3:6 [INFO] [stdout] | [INFO] [stdout] 3 | type SingleLink = Option>>; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Node` is never constructed [INFO] [stdout] --> src/bin/c04p01_singly_linked_list.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | struct Node { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/bin/c04p01_singly_linked_list.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 11 | impl Node { [INFO] [stdout] | --------- associated function in this implementation [INFO] [stdout] 12 | // create a new node [INFO] [stdout] 13 | fn new(value: String) -> Rc> { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `TransactionLog` is never constructed [INFO] [stdout] --> src/bin/c04p01_singly_linked_list.rs:17:8 [INFO] [stdout] | [INFO] [stdout] 17 | struct TransactionLog { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new_empty`, `append`, and `pop` are never used [INFO] [stdout] --> src/bin/c04p01_singly_linked_list.rs:24:12 [INFO] [stdout] | [INFO] [stdout] 23 | impl TransactionLog { [INFO] [stdout] | ------------------- associated items in this implementation [INFO] [stdout] 24 | pub fn new_empty() -> Self { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 32 | pub fn append(&mut self, value: String) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 42 | pub fn pop(&mut self) -> Option { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `array::::map` that must be used [INFO] [stdout] --> src/bin/c05p01_binary_search_tree.rs:159:9 [INFO] [stdout] | [INFO] [stdout] 159 | / city_list.map(|item| { [INFO] [stdout] 160 | | tree.add(IoTDevice { [INFO] [stdout] 161 | | numerical_id: item.0 as u64, [INFO] [stdout] 162 | | address: item.1.to_owned(), [INFO] [stdout] 163 | | }) [INFO] [stdout] 164 | | }); [INFO] [stdout] | |__________^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 159 | let _ = city_list.map(|item| { [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `array::::map` that must be used [INFO] [stdout] --> src/bin/c05p01_binary_search_tree.rs:187:9 [INFO] [stdout] | [INFO] [stdout] 187 | / city_list.map(|item| { [INFO] [stdout] 188 | | tree.add(IoTDevice { [INFO] [stdout] 189 | | numerical_id: item.0 as u64, [INFO] [stdout] 190 | | address: item.1.to_owned(), [INFO] [stdout] 191 | | }) [INFO] [stdout] 192 | | }); [INFO] [stdout] | |__________^ [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 187 | let _ = city_list.map(|item| { [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.62s [INFO] running `Command { std: "docker" "inspect" "0a6696f1aced2f66a5db0ff209cdb590092643c7e89e525f637c553ef9f70e4a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0a6696f1aced2f66a5db0ff209cdb590092643c7e89e525f637c553ef9f70e4a", kill_on_drop: false }` [INFO] [stdout] 0a6696f1aced2f66a5db0ff209cdb590092643c7e89e525f637c553ef9f70e4a