[INFO] updating cached repository ZangaiFamily/matching
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ZangaiFamily/matching
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ZangaiFamily/matching" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/ZangaiFamily/matching"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/ZangaiFamily/matching'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ZangaiFamily/matching" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/ZangaiFamily/matching"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/ZangaiFamily/matching'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3a29e668dd3a058a482cf0193b1156ea6f6c2787
[INFO] sha for GitHub repo ZangaiFamily/matching: 3a29e668dd3a058a482cf0193b1156ea6f6c2787
[INFO] validating manifest of ZangaiFamily/matching on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ZangaiFamily/matching on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ZangaiFamily/matching
[INFO] finished frobbing ZangaiFamily/matching
[INFO] frobbed toml for ZangaiFamily/matching written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/ZangaiFamily/matching/Cargo.toml
[INFO] started frobbing ZangaiFamily/matching
[INFO] finished frobbing ZangaiFamily/matching
[INFO] frobbed toml for ZangaiFamily/matching written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/ZangaiFamily/matching/Cargo.toml
[INFO] crate ZangaiFamily/matching already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ZangaiFamily/matching against master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7 for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-3/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/ZangaiFamily/matching:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] aaed4a100bb9990bad3cf936b24c0572e806827e31ae9bdb0b51999b9fdf0b59
[INFO] running `"docker" "start" "-a" "aaed4a100bb9990bad3cf936b24c0572e806827e31ae9bdb0b51999b9fdf0b59"`
[INFO] [stderr]     Checking serde_json v1.0.26
[INFO] [stderr]     Checking rust_decimal v0.10.1
[INFO] [stderr]     Checking matching v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `rust_decimal::Decimal`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rust_decimal::Decimal;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Error`, `Value`
[INFO] [stderr]  --> src/main.rs:5:18
[INFO] [stderr]   |
[INFO] [stderr] 5 | use serde_json::{Value, Error};
[INFO] [stderr]   |                  ^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::read_to_string`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::fs::read_to_string;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude::*`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::io::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::BufReader`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::io::BufReader;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::LinkedList`
[INFO] [stderr]  --> src/structs/order_book.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::LinkedList;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ord`
[INFO] [stderr]  --> src/structs/order_book.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cmp::Ord;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/structs/order_book.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_decimal::Decimal`
[INFO] [stderr]  --> src/structs/order_book.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rust_decimal::Decimal;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ord`
[INFO] [stderr]  --> src/ds/list.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp::Ord;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/ds/list.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `test::Bencher`
[INFO] [stderr]   --> src/main.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 | use test::Bencher;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Error`
[INFO] [stderr]  --> src/main.rs:5:25
[INFO] [stderr]   |
[INFO] [stderr] 5 | use serde_json::{Value, Error};
[INFO] [stderr]   |                         ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::read_to_string`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::fs::read_to_string;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::BufReader`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::io::BufReader;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::LinkedList`
[INFO] [stderr]  --> src/structs/order_book.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::LinkedList;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ord`
[INFO] [stderr]  --> src/structs/order_book.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cmp::Ord;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/structs/order_book.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ord`
[INFO] [stderr]  --> src/ds/list.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp::Ord;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/ds/list.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start`
[INFO] [stderr]   --> src/ds/heap.rs:37:7
[INFO] [stderr]    |
[INFO] [stderr] 37 |         let start = 0;
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_start`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Limit`
[INFO] [stderr]  --> src/structs/order.rs:8:2
[INFO] [stderr]   |
[INFO] [stderr] 8 |     Limit,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Market`
[INFO] [stderr]  --> src/structs/order.rs:9:2
[INFO] [stderr]   |
[INFO] [stderr] 9 |     Market
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Ask`
[INFO] [stderr]   --> src/structs/order.rs:14:2
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Ask,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Bid`
[INFO] [stderr]   --> src/structs/order.rs:15:2
[INFO] [stderr]    |
[INFO] [stderr] 15 |     Bid
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/structs/order.rs:29:2
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn new(id: u64, price: &str, volume: &str, kind: OrderKind, side: OrderSide) -> Order {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_fulfilled`
[INFO] [stderr]   --> src/structs/order.rs:40:2
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn is_fulfilled(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `volume_remained`
[INFO] [stderr]   --> src/structs/order.rs:44:2
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn volume_remained(&self) -> Decimal {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `OrderBook`
[INFO] [stderr]   --> src/structs/order_book.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub struct OrderBook {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/structs/order_book.rs:18:2
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn new(side: OrderSide) -> OrderBook {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_order`
[INFO] [stderr]   --> src/structs/order_book.rs:31:2
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn add_order(&mut self, order: Order) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `cancel_order`
[INFO] [stderr]   --> src/structs/order_book.rs:39:2
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn cancel_order(&mut self, order: Order) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Market`
[INFO] [stderr]  --> src/structs/market.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Market {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/structs/market.rs:11:2
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(id: u64) -> Market {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_order`
[INFO] [stderr]   --> src/structs/market.rs:19:2
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn add_order(&mut self, order: Order) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `cancel_order`
[INFO] [stderr]   --> src/structs/market.rs:26:2
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn cancel_order(&mut self, order: Order) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `consume_limit_orders`
[INFO] [stderr]  --> src/matching/mod.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn consume_limit_orders (order: &mut Order, order_book: &mut OrderBook) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `consume_market_orders`
[INFO] [stderr]   --> src/matching/mod.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub fn consume_market_orders (order: &mut Order, order_book: &mut OrderBook) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `start_match`
[INFO] [stderr]   --> src/matching/mod.rs:46:1
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn start_match (mut order: Order, market: &mut Market) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `subtract_volume`
[INFO] [stderr]   --> src/matching/mod.rs:67:1
[INFO] [stderr]    |
[INFO] [stderr] 67 | pub fn subtract_volume(order_a: &mut Order, order_b: &mut Order) -> (bool, bool) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Heap`
[INFO] [stderr]  --> src/ds/heap.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Heap<T: Ord + WithId> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/ds/heap.rs:13:2
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn new() -> Heap<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parent`
[INFO] [stderr]   --> src/ds/heap.rs:21:2
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn parent(&self, idx: usize) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `left`
[INFO] [stderr]   --> src/ds/heap.rs:26:2
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn left(&self, idx: usize) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `right`
[INFO] [stderr]   --> src/ds/heap.rs:31:2
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn right(&self, idx: usize) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sift_up`
[INFO] [stderr]   --> src/ds/heap.rs:36:2
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn sift_up(&mut self, from: usize) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sift_down`
[INFO] [stderr]   --> src/ds/heap.rs:52:2
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn sift_down(&mut self, from: usize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push`
[INFO] [stderr]   --> src/ds/heap.rs:73:2
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn push(&mut self, elem: T) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `swap`
[INFO] [stderr]   --> src/ds/heap.rs:81:2
[INFO] [stderr]    |
[INFO] [stderr] 81 |     pub fn swap(&mut self, idx_a: usize, idx_b: usize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove`
[INFO] [stderr]   --> src/ds/heap.rs:88:2
[INFO] [stderr]    |
[INFO] [stderr] 88 |     pub fn remove(&mut self, id: u64) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek`
[INFO] [stderr]    --> src/ds/heap.rs:114:2
[INFO] [stderr]     |
[INFO] [stderr] 114 |     pub fn peek(&self) -> Option<&T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_mut`
[INFO] [stderr]    --> src/ds/heap.rs:119:2
[INFO] [stderr]     |
[INFO] [stderr] 119 |     pub fn peek_mut(&mut self) -> Option<&mut T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]    --> src/ds/heap.rs:124:2
[INFO] [stderr]     |
[INFO] [stderr] 124 |     pub fn pop(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]    --> src/ds/heap.rs:130:2
[INFO] [stderr]     |
[INFO] [stderr] 130 |     pub fn len(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `List`
[INFO] [stderr]  --> src/ds/list.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct List<T: WithId> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Node`
[INFO] [stderr]   --> src/ds/list.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub struct Node<T> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/ds/list.rs:22:2
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn new() -> List<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]   --> src/ds/list.rs:32:2
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `front`
[INFO] [stderr]   --> src/ds/list.rs:37:2
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn front(&self) -> Option<&T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `front_mut`
[INFO] [stderr]   --> src/ds/list.rs:42:2
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub fn front_mut(&mut self) -> Option<&mut T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_back`
[INFO] [stderr]   --> src/ds/list.rs:47:2
[INFO] [stderr]    |
[INFO] [stderr] 47 |     pub fn push_back(&mut self, elem: T) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove`
[INFO] [stderr]   --> src/ds/list.rs:71:2
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn remove(&mut self, id: u64) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop_front`
[INFO] [stderr]   --> src/ds/list.rs:99:2
[INFO] [stderr]    |
[INFO] [stderr] 99 |     pub fn pop_front(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Order`
[INFO] [stderr]    --> src/ds/list.rs:106:1
[INFO] [stderr]     |
[INFO] [stderr] 106 | struct Order {
[INFO] [stderr]     | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::io::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `market`
[INFO] [stderr]   --> src/structs/market.rs:48:6
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let market = Market::new(1);
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_market`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b_fulfilled`
[INFO] [stderr]   --> src/matching/mod.rs:81:20
[INFO] [stderr]    |
[INFO] [stderr] 81 |     let (a_fulfilled, b_fulfilled) = subtract_volume(&mut order_a, &mut order_b);
[INFO] [stderr]    |                       ^^^^^^^^^^^ help: consider prefixing with an underscore: `_b_fulfilled`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start`
[INFO] [stderr]   --> src/ds/heap.rs:37:7
[INFO] [stderr]    |
[INFO] [stderr] 37 |         let start = 0;
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_start`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `left`
[INFO] [stderr]   --> src/ds/heap.rs:26:2
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn left(&self, idx: usize) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `right`
[INFO] [stderr]   --> src/ds/heap.rs:31:2
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn right(&self, idx: usize) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.04s
[INFO] running `"docker" "inspect" "aaed4a100bb9990bad3cf936b24c0572e806827e31ae9bdb0b51999b9fdf0b59"`
[INFO] running `"docker" "rm" "-f" "aaed4a100bb9990bad3cf936b24c0572e806827e31ae9bdb0b51999b9fdf0b59"`
[INFO] [stdout] aaed4a100bb9990bad3cf936b24c0572e806827e31ae9bdb0b51999b9fdf0b59