[INFO] cloning repository https://github.com/Abdulkarim4u/TransactionLog
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Abdulkarim4u/TransactionLog" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbdulkarim4u%2FTransactionLog", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbdulkarim4u%2FTransactionLog'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9d4fa8bd758dec9951237ee3c4d0a57eb8af5d28
[INFO] testing Abdulkarim4u/TransactionLog against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbdulkarim4u%2FTransactionLog" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Abdulkarim4u/TransactionLog
[INFO] finished tweaking git repo https://github.com/Abdulkarim4u/TransactionLog
[INFO] tweaked toml for git repo https://github.com/Abdulkarim4u/TransactionLog written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Abdulkarim4u/TransactionLog on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Abdulkarim4u/TransactionLog 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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bb30ed56e46197512925ca31d0b18cfc65e3f418ad046983895ed652ec2d42a7
[INFO] running `Command { std: "docker" "start" "-a" "bb30ed56e46197512925ca31d0b18cfc65e3f418ad046983895ed652ec2d42a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb30ed56e46197512925ca31d0b18cfc65e3f418ad046983895ed652ec2d42a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb30ed56e46197512925ca31d0b18cfc65e3f418ad046983895ed652ec2d42a7", kill_on_drop: false }`
[INFO] [stdout] bb30ed56e46197512925ca31d0b18cfc65e3f418ad046983895ed652ec2d42a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1dd581bd4c7dd44b847b6c84b135c0263a721dee5cac4e81f08ed94c927b5929
[INFO] running `Command { std: "docker" "start" "-a" "1dd581bd4c7dd44b847b6c84b135c0263a721dee5cac4e81f08ed94c927b5929", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.118
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling transactionLog v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/doubly_linked_list.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::Cell`
[INFO] [stdout]   --> src/dynamic_array.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::cell::Cell;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/skip_list.rs:8:17
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/doubly_linked_list.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl Node {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 19 |     fn new(value: String) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BetterTransactionLog` is never constructed
[INFO] [stdout]   --> src/doubly_linked_list.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct BetterTransactionLog {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_empty`, `append`, `pop`, `back_iter`, and `iter` are never used
[INFO] [stdout]   --> src/doubly_linked_list.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl BetterTransactionLog {
[INFO] [stdout]    | ------------------------- associated items in this implementation
[INFO] [stdout] 36 |     pub fn new_empty() -> BetterTransactionLog {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     pub fn append(&mut self, value: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub fn pop(&mut self) -> Option<String> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |     pub fn back_iter(self) -> ListIterator {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 78 |     pub fn 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:97:8
[INFO] [stdout]    |
[INFO] [stdout] 96 | impl ListIterator {
[INFO] [stdout]    | ----------------- associated function in this implementation
[INFO] [stdout] 97 |     fn new(start_at: Link) -> ListIterator {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MIN_SIZE` is never used
[INFO] [stdout]   --> src/dynamic_array.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const MIN_SIZE: usize = 10;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TimestampSaver` is never constructed
[INFO] [stdout]   --> src/dynamic_array.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct TimestampSaver {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_empty`, `grow`, `append`, and `at` are never used
[INFO] [stdout]   --> src/dynamic_array.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl TimestampSaver {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 27 |     pub fn new_empty() -> TimestampSaver {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn grow(&mut self, min_cap: usize) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn append(&mut self, value: u64) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn at(&mut self, index: usize) -> Node {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/dynamic_array.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | impl ListIterator {
[INFO] [stdout]    | ----------------- associated function in this implementation
[INFO] [stdout] 80 |     fn new(index: usize, buf: Box<[Node]>) -> ListIterator {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/singly_linked_list.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Link` is never used
[INFO] [stdout]   --> src/singly_linked_list.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | type Link = Option<Rc<RefCell<Node>>>;
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/singly_linked_list.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Node {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 15 |     fn new(value: String) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TransactionLog` is never constructed
[INFO] [stdout]   --> src/singly_linked_list.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct TransactionLog {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_empty`, `append`, and `pop` are never used
[INFO] [stdout]   --> src/singly_linked_list.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl TransactionLog {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 31 |     pub fn new_empty() -> TransactionLog {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn append(&mut self, value: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     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/skip_list.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Node {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 24 |     fn new(links: Vec<Link>, offset: u64, command: String) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BestTransactionLog` is never constructed
[INFO] [stdout]   --> src/skip_list.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub struct BestTransactionLog {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_empty`, `get_level`, `append`, `find`, and `iter_level` are never used
[INFO] [stdout]    --> src/skip_list.rs:42:12
[INFO] [stdout]     |
[INFO] [stdout] 41  | impl BestTransactionLog {
[INFO] [stdout]     | ----------------------- associated items in this implementation
[INFO] [stdout] 42  |     pub fn new_empty(max_level: usize) -> BestTransactionLog {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51  |     fn get_level(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60  |     pub fn append(&mut self, offset: u64, value: String) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 87  |     pub fn find(&self, offset: u64) -> Option<String> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 121 |     fn iter_level(&self, level: usize) -> ListIterator {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/skip_list.rs:142:8
[INFO] [stdout]     |
[INFO] [stdout] 141 | impl ListIterator {
[INFO] [stdout]     | ----------------- associated function in this implementation
[INFO] [stdout] 142 |     fn new(start_at: Option<Rc<RefCell<Node>>>, level: usize) -> ListIterator {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `transactionLog` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `transaction_log`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.64s
[INFO] running `Command { std: "docker" "inspect" "1dd581bd4c7dd44b847b6c84b135c0263a721dee5cac4e81f08ed94c927b5929", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dd581bd4c7dd44b847b6c84b135c0263a721dee5cac4e81f08ed94c927b5929", kill_on_drop: false }`
[INFO] [stdout] 1dd581bd4c7dd44b847b6c84b135c0263a721dee5cac4e81f08ed94c927b5929
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 799b198d0dd0f9f79c9f84b0dc0b4b0fee45cc39ab0841661b20ddfae538e3e0
[INFO] running `Command { std: "docker" "start" "-a" "799b198d0dd0f9f79c9f84b0dc0b4b0fee45cc39ab0841661b20ddfae538e3e0", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/doubly_linked_list.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::Cell`
[INFO] [stdout]   --> src/dynamic_array.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::cell::Cell;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/skip_list.rs:8:17
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/doubly_linked_list.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl Node {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 19 |     fn new(value: String) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BetterTransactionLog` is never constructed
[INFO] [stdout]   --> src/doubly_linked_list.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct BetterTransactionLog {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_empty`, `append`, `pop`, `back_iter`, and `iter` are never used
[INFO] [stdout]   --> src/doubly_linked_list.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl BetterTransactionLog {
[INFO] [stdout]    | ------------------------- associated items in this implementation
[INFO] [stdout] 36 |     pub fn new_empty() -> BetterTransactionLog {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     pub fn append(&mut self, value: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub fn pop(&mut self) -> Option<String> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |     pub fn back_iter(self) -> ListIterator {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 78 |     pub fn 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:97:8
[INFO] [stdout]    |
[INFO] [stdout] 96 | impl ListIterator {
[INFO] [stdout]    | ----------------- associated function in this implementation
[INFO] [stdout] 97 |     fn new(start_at: Link) -> ListIterator {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MIN_SIZE` is never used
[INFO] [stdout]   --> src/dynamic_array.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const MIN_SIZE: usize = 10;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TimestampSaver` is never constructed
[INFO] [stdout]   --> src/dynamic_array.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct TimestampSaver {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_empty`, `grow`, `append`, and `at` are never used
[INFO] [stdout]   --> src/dynamic_array.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl TimestampSaver {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 27 |     pub fn new_empty() -> TimestampSaver {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn grow(&mut self, min_cap: usize) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn append(&mut self, value: u64) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn at(&mut self, index: usize) -> Node {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/dynamic_array.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | impl ListIterator {
[INFO] [stdout]    | ----------------- associated function in this implementation
[INFO] [stdout] 80 |     fn new(index: usize, buf: Box<[Node]>) -> ListIterator {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/singly_linked_list.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Link` is never used
[INFO] [stdout]   --> src/singly_linked_list.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | type Link = Option<Rc<RefCell<Node>>>;
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/singly_linked_list.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Node {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 15 |     fn new(value: String) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TransactionLog` is never constructed
[INFO] [stdout]   --> src/singly_linked_list.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct TransactionLog {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_empty`, `append`, and `pop` are never used
[INFO] [stdout]   --> src/singly_linked_list.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl TransactionLog {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 31 |     pub fn new_empty() -> TransactionLog {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn append(&mut self, value: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     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/skip_list.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Node {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 24 |     fn new(links: Vec<Link>, offset: u64, command: String) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BestTransactionLog` is never constructed
[INFO] [stdout]   --> src/skip_list.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub struct BestTransactionLog {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_empty`, `get_level`, `append`, `find`, and `iter_level` are never used
[INFO] [stdout]    --> src/skip_list.rs:42:12
[INFO] [stdout]     |
[INFO] [stdout] 41  | impl BestTransactionLog {
[INFO] [stdout]     | ----------------------- associated items in this implementation
[INFO] [stdout] 42  |     pub fn new_empty(max_level: usize) -> BestTransactionLog {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51  |     fn get_level(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60  |     pub fn append(&mut self, offset: u64, value: String) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 87  |     pub fn find(&self, offset: u64) -> Option<String> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 121 |     fn iter_level(&self, level: usize) -> ListIterator {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/skip_list.rs:142:8
[INFO] [stdout]     |
[INFO] [stdout] 141 | impl ListIterator {
[INFO] [stdout]     | ----------------- associated function in this implementation
[INFO] [stdout] 142 |     fn new(start_at: Option<Rc<RefCell<Node>>>, level: usize) -> ListIterator {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling transactionLog v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: crate `transactionLog` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `transaction_log`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/doubly_linked_list.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::Cell`
[INFO] [stdout]   --> src/dynamic_array.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::cell::Cell;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/skip_list.rs:8:17
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.17s
[INFO] running `Command { std: "docker" "inspect" "799b198d0dd0f9f79c9f84b0dc0b4b0fee45cc39ab0841661b20ddfae538e3e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "799b198d0dd0f9f79c9f84b0dc0b4b0fee45cc39ab0841661b20ddfae538e3e0", kill_on_drop: false }`
[INFO] [stdout] 799b198d0dd0f9f79c9f84b0dc0b4b0fee45cc39ab0841661b20ddfae538e3e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a61b23e0bfcba89956d85089f88b438b7984dd3e204dca0e0e8c2f4d61ce13ad
[INFO] running `Command { std: "docker" "start" "-a" "a61b23e0bfcba89956d85089f88b438b7984dd3e204dca0e0e8c2f4d61ce13ad", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `Ref`
[INFO] [stderr]  --> src/doubly_linked_list.rs:6:17
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::cell::{Ref, RefCell};
[INFO] [stderr]   |                 ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::Cell`
[INFO] [stderr]   --> src/dynamic_array.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use std::cell::Cell;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Ref`
[INFO] [stderr]  --> src/skip_list.rs:8:17
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::cell::{Ref, RefCell};
[INFO] [stderr]   |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/doubly_linked_list.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | impl Node {
[INFO] [stderr]    | --------- associated function in this implementation
[INFO] [stderr] 19 |     fn new(value: String) -> Rc<RefCell<Node>> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `BetterTransactionLog` is never constructed
[INFO] [stderr]   --> src/doubly_linked_list.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub struct BetterTransactionLog {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new_empty`, `append`, `pop`, `back_iter`, and `iter` are never used
[INFO] [stderr]   --> src/doubly_linked_list.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr] 35 | impl BetterTransactionLog {
[INFO] [stderr]    | ------------------------- associated items in this implementation
[INFO] [stderr] 36 |     pub fn new_empty() -> BetterTransactionLog {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 44 |     pub fn append(&mut self, value: String) {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 57 |     pub fn pop(&mut self) -> Option<String> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 74 |     pub fn back_iter(self) -> ListIterator {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 78 |     pub fn iter(&self) -> ListIterator {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/doubly_linked_list.rs:97:8
[INFO] [stderr]    |
[INFO] [stderr] 96 | impl ListIterator {
[INFO] [stderr]    | ----------------- associated function in this implementation
[INFO] [stderr] 97 |     fn new(start_at: Link) -> ListIterator {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `MIN_SIZE` is never used
[INFO] [stderr]   --> src/dynamic_array.rs:16:7
[INFO] [stderr]    |
[INFO] [stderr] 16 | const MIN_SIZE: usize = 10;
[INFO] [stderr]    |       ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `TimestampSaver` is never constructed
[INFO] [stderr]   --> src/dynamic_array.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub struct TimestampSaver {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new_empty`, `grow`, `append`, and `at` are never used
[INFO] [stderr]   --> src/dynamic_array.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 26 | impl TimestampSaver {
[INFO] [stderr]    | ------------------- associated items in this implementation
[INFO] [stderr] 27 |     pub fn new_empty() -> TimestampSaver {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 35 |     fn grow(&mut self, min_cap: usize) {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 48 |     pub fn append(&mut self, value: u64) {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 56 |     pub fn at(&mut self, index: usize) -> Node {
[INFO] [stderr]    |            ^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/dynamic_array.rs:80:8
[INFO] [stderr]    |
[INFO] [stderr] 79 | impl ListIterator {
[INFO] [stderr]    | ----------------- associated function in this implementation
[INFO] [stderr] 80 |     fn new(index: usize, buf: Box<[Node]>) -> ListIterator {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Node` is never constructed
[INFO] [stderr]  --> src/singly_linked_list.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct Node {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `Link` is never used
[INFO] [stderr]   --> src/singly_linked_list.rs:12:6
[INFO] [stderr]    |
[INFO] [stderr] 12 | type Link = Option<Rc<RefCell<Node>>>;
[INFO] [stderr]    |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/singly_linked_list.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 14 | impl Node {
[INFO] [stderr]    | --------- associated function in this implementation
[INFO] [stderr] 15 |     fn new(value: String) -> Rc<RefCell<Node>> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `TransactionLog` is never constructed
[INFO] [stderr]   --> src/singly_linked_list.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub struct TransactionLog {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new_empty`, `append`, and `pop` are never used
[INFO] [stderr]   --> src/singly_linked_list.rs:31:12
[INFO] [stderr]    |
[INFO] [stderr] 30 | impl TransactionLog {
[INFO] [stderr]    | ------------------- associated items in this implementation
[INFO] [stderr] 31 |     pub fn new_empty() -> TransactionLog {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 38 |     pub fn append(&mut self, value: String) {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 49 |     pub fn pop(&mut self) -> Option<String> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/skip_list.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 23 | impl Node {
[INFO] [stderr]    | --------- associated function in this implementation
[INFO] [stderr] 24 |     fn new(links: Vec<Link>, offset: u64, command: String) -> Rc<RefCell<Node>> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `BestTransactionLog` is never constructed
[INFO] [stderr]   --> src/skip_list.rs:34:12
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub struct BestTransactionLog {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new_empty`, `get_level`, `append`, `find`, and `iter_level` are never used
[INFO] [stderr]    --> src/skip_list.rs:42:12
[INFO] [stderr]     |
[INFO] [stderr] 41  | impl BestTransactionLog {
[INFO] [stderr]     | ----------------------- associated items in this implementation
[INFO] [stderr] 42  |     pub fn new_empty(max_level: usize) -> BestTransactionLog {
[INFO] [stderr]     |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 51  |     fn get_level(&self) -> usize {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 60  |     pub fn append(&mut self, offset: u64, value: String) {
[INFO] [stderr]     |            ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 87  |     pub fn find(&self, offset: u64) -> Option<String> {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 121 |     fn iter_level(&self, level: usize) -> ListIterator {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]    --> src/skip_list.rs:142:8
[INFO] [stderr]     |
[INFO] [stderr] 141 | impl ListIterator {
[INFO] [stderr]     | ----------------- associated function in this implementation
[INFO] [stderr] 142 |     fn new(start_at: Option<Rc<RefCell<Node>>>, level: usize) -> ListIterator {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `transactionLog` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = help: convert the identifier to snake case: `transaction_log`
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `transactionLog` (lib) generated 21 warnings (run `cargo fix --lib -p transactionLog` to apply 3 suggestions)
[INFO] [stderr] warning: `transactionLog` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/transactionLog-a95ec9ad75c8c544)
[INFO] [stdout] 
[INFO] [stdout] running 17 tests
[INFO] [stdout] test tests::better_transaction_log_append ... ok
[INFO] [stdout] test tests::bench_dynamic_array_append ... ok
[INFO] [stdout] test tests::bench_linked_list_append ... ok
[INFO] [stdout] test tests::better_transaction_log_iterator ... ok
[INFO] [stdout] test tests::bench_vec_append ... ok
[INFO] [stdout] test tests::dynamic_array_at ... ok
[INFO] [stdout] test tests::skip_list_append ... ok
[INFO] [stdout] test tests::skip_list_find ... ok
[INFO] [stdout] test tests::transaction_log_append ... ok
[INFO] [stdout] test tests::transaction_log_pop ... ok
[INFO] [stdout] test tests::dynamic_array_iterate ... ok
[INFO] [stdout] test tests::bench_vec_find ... ok
[INFO] [stdout] test tests::dynamic_array_append ... ok
[INFO] [stdout] test tests::better_transaction_log_pop ... ok
[INFO] [stdout] test tests::bench_skip_list_find ... ok
[INFO] [stdout] test tests::bench_std_linked_list_find ... ok
[INFO] [stdout] test tests::bench_linked_list_find ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 17 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests transactionLog
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a61b23e0bfcba89956d85089f88b438b7984dd3e204dca0e0e8c2f4d61ce13ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a61b23e0bfcba89956d85089f88b438b7984dd3e204dca0e0e8c2f4d61ce13ad", kill_on_drop: false }`
[INFO] [stdout] a61b23e0bfcba89956d85089f88b438b7984dd3e204dca0e0e8c2f4d61ce13ad
