[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] testing kazukiyoshida/data-structures-and-algorithms against nightly-2025-01-18+rustflags=-Zrandomize-layout for randomize-layout-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazukiyoshida%2Fdata-structures-and-algorithms" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kazukiyoshida/data-structures-and-algorithms on toolchain nightly-2025-01-18
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2025-01-18" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-0-tc2/source/Cargo.toml
[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" "+nightly-2025-01-18" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2025-01-18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83802b856a1c7f76d67239236a7c373a1d9a73c1fcbc45824c042db4151821c1
[INFO] running `Command { std: "docker" "start" "-a" "83802b856a1c7f76d67239236a7c373a1d9a73c1fcbc45824c042db4151821c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83802b856a1c7f76d67239236a7c373a1d9a73c1fcbc45824c042db4151821c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83802b856a1c7f76d67239236a7c373a1d9a73c1fcbc45824c042db4151821c1", kill_on_drop: false }`
[INFO] [stdout] 83802b856a1c7f76d67239236a7c373a1d9a73c1fcbc45824c042db4151821c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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 -Zrandomize-layout" "-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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2025-01-18" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e49a9d9503868a110f86a5072bd1391b046fd3bfd6ec44f20eb97e58d14d2b71
[INFO] running `Command { std: "docker" "start" "-a" "e49a9d9503868a110f86a5072bd1391b046fd3bfd6ec44f20eb97e58d14d2b71", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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)]` 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)]` 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 0.15s
[INFO] running `Command { std: "docker" "inspect" "e49a9d9503868a110f86a5072bd1391b046fd3bfd6ec44f20eb97e58d14d2b71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e49a9d9503868a110f86a5072bd1391b046fd3bfd6ec44f20eb97e58d14d2b71", kill_on_drop: false }`
[INFO] [stdout] e49a9d9503868a110f86a5072bd1391b046fd3bfd6ec44f20eb97e58d14d2b71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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 -Zrandomize-layout" "-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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2025-01-18" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35823517216ab3055a0a08e73ea4b56360d200c357d24d31800c77332e29771f
[INFO] running `Command { std: "docker" "start" "-a" "35823517216ab3055a0a08e73ea4b56360d200c357d24d31800c77332e29771f", kill_on_drop: false }`
[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)]` 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)]` 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] [stderr]    Compiling data-structures-and-algorithms v0.1.0 (/opt/rustwide/workdir)
[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] [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)]` 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)]` 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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "35823517216ab3055a0a08e73ea4b56360d200c357d24d31800c77332e29771f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35823517216ab3055a0a08e73ea4b56360d200c357d24d31800c77332e29771f", kill_on_drop: false }`
[INFO] [stdout] 35823517216ab3055a0a08e73ea4b56360d200c357d24d31800c77332e29771f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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 -Zrandomize-layout" "-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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2025-01-18" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] Error response from daemon: mkdir /var/lib/docker/overlay2/55bcd9708ecdb1d9002708845172cea4943c11e5467baa3527c0698b35bdb0c8-init/merged: no space left on device
