[INFO] cloning repository https://github.com/kazukiyoshida/data-structures-and-algorithms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kazukiyoshida/data-structures-and-algorithms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazukiyoshida%2Fdata-structures-and-algorithms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazukiyoshida%2Fdata-structures-and-algorithms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7a413b29d5c5a08ac8a1781f77128e9e42afc8d7
[INFO] checking kazukiyoshida/data-structures-and-algorithms against master#507271bc119683008ec719ecee48814e8ac86c65 for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazukiyoshida%2Fdata-structures-and-algorithms" "/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/kazukiyoshida/data-structures-and-algorithms
[INFO] finished tweaking git repo https://github.com/kazukiyoshida/data-structures-and-algorithms
[INFO] tweaked toml for git repo https://github.com/kazukiyoshida/data-structures-and-algorithms written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kazukiyoshida/data-structures-and-algorithms on toolchain 507271bc119683008ec719ecee48814e8ac86c65
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kazukiyoshida/data-structures-and-algorithms 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" "+507271bc119683008ec719ecee48814e8ac86c65" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 25d00ebc6cbe69c60cef775377a4c4697a96ee34b3cede485284bf8426db8f36
[INFO] running `Command { std: "docker" "start" "-a" "25d00ebc6cbe69c60cef775377a4c4697a96ee34b3cede485284bf8426db8f36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25d00ebc6cbe69c60cef775377a4c4697a96ee34b3cede485284bf8426db8f36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25d00ebc6cbe69c60cef775377a4c4697a96ee34b3cede485284bf8426db8f36", kill_on_drop: false }`
[INFO] [stdout] 25d00ebc6cbe69c60cef775377a4c4697a96ee34b3cede485284bf8426db8f36
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c21b18d1d35d1edee3f16dfb74d8f85c7fc1a2554f8ca6a8b84732413576e29a
[INFO] running `Command { std: "docker" "start" "-a" "c21b18d1d35d1edee3f16dfb74d8f85c7fc1a2554f8ca6a8b84732413576e29a", kill_on_drop: false }`
[INFO] [stderr]     Checking data-structures-and-algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `offset`
[INFO] [stdout]   --> src/skip_list.rs:40:30
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn append(&mut self, offset: u64, value: String) {
[INFO] [stdout]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_offset`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/skip_list.rs:40:43
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn append(&mut self, offset: u64, value: String) {
[INFO] [stdout]    |                                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `pop`, `iter`, and `back_iter` are never used
[INFO] [stdout]   --> src/doubly_linked_list.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl BetterTransactionLog {
[INFO] [stdout]    | ------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 63 |     pub fn pop(&mut self) -> Option<String> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 82 |     pub fn iter(&self) -> ListIterator {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 86 |     pub fn back_iter(self) -> ListIterator {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/skip_list.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/skip_list.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Node {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 12 |     fn new(offset: u64, command: String) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Link` is never used
[INFO] [stdout]   --> src/skip_list.rs:21:6
[INFO] [stdout]    |
[INFO] [stdout] 21 | type Link = Option<Rc<RefCell<Node>>>;
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SkipList` is never constructed
[INFO] [stdout]   --> src/skip_list.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct SkipList {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_empty` and `append` are never used
[INFO] [stdout]   --> src/skip_list.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl SkipList {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 31 |     pub fn new_empty() -> SkipList {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn append(&mut self, offset: u64, value: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `offset`
[INFO] [stdout]   --> src/skip_list.rs:40:30
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn append(&mut self, offset: u64, value: String) {
[INFO] [stdout]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_offset`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/skip_list.rs:40:43
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn append(&mut self, offset: u64, value: String) {
[INFO] [stdout]    |                                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]   --> src/linked_list.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Node {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/linked_list.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | impl Node {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 30 |     fn new(v: String) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `SingleLink` is never used
[INFO] [stdout]   --> src/linked_list.rs:38:6
[INFO] [stdout]    |
[INFO] [stdout] 38 | type SingleLink = Option<Rc<RefCell<Node>>>;
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TransactionLog` is never constructed
[INFO] [stdout]   --> src/linked_list.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct TransactionLog {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_empty`, `append`, and `pop` are never used
[INFO] [stdout]   --> src/linked_list.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl TransactionLog {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 48 |     pub fn new_empty() -> TransactionLog {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn append(&mut self, v: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub fn pop(&mut self) -> Option<String> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/doubly_linked_list.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl Node {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 22 |     fn new(v: String) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BetterTransactionLog` is never constructed
[INFO] [stdout]   --> src/doubly_linked_list.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct BetterTransactionLog {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_empty`, `append`, `pop`, `iter`, and `back_iter` are never used
[INFO] [stdout]   --> src/doubly_linked_list.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl BetterTransactionLog {
[INFO] [stdout]    | ------------------------- associated items in this implementation
[INFO] [stdout] 41 |     pub fn new_empty() -> BetterTransactionLog {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn append(&mut self, v: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     pub fn pop(&mut self) -> Option<String> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 82 |     pub fn iter(&self) -> ListIterator {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 86 |     pub fn back_iter(self) -> ListIterator {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/doubly_linked_list.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 104 | impl ListIterator {
[INFO] [stdout]     | ----------------- associated function in this implementation
[INFO] [stdout] 105 |     fn new(start: Link) -> ListIterator {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/skip_list.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/skip_list.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Node {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 12 |     fn new(offset: u64, command: String) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Link` is never used
[INFO] [stdout]   --> src/skip_list.rs:21:6
[INFO] [stdout]    |
[INFO] [stdout] 21 | type Link = Option<Rc<RefCell<Node>>>;
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SkipList` is never constructed
[INFO] [stdout]   --> src/skip_list.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct SkipList {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_empty` and `append` are never used
[INFO] [stdout]   --> src/skip_list.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl SkipList {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 31 |     pub fn new_empty() -> SkipList {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn append(&mut self, offset: u64, value: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "c21b18d1d35d1edee3f16dfb74d8f85c7fc1a2554f8ca6a8b84732413576e29a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c21b18d1d35d1edee3f16dfb74d8f85c7fc1a2554f8ca6a8b84732413576e29a", kill_on_drop: false }`
[INFO] [stdout] c21b18d1d35d1edee3f16dfb74d8f85c7fc1a2554f8ca6a8b84732413576e29a
