[INFO] cloning repository https://github.com/ZangaiFamily/matching
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ZangaiFamily/matching" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZangaiFamily%2Fmatching", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZangaiFamily%2Fmatching'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a29e668dd3a058a482cf0193b1156ea6f6c2787
[INFO] testing ZangaiFamily/matching against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZangaiFamily%2Fmatching" "/workspace/builds/worker-16/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-16/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ZangaiFamily/matching on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ZangaiFamily/matching
[INFO] finished tweaking git repo https://github.com/ZangaiFamily/matching
[INFO] tweaked toml for git repo https://github.com/ZangaiFamily/matching written to /workspace/builds/worker-16/source/Cargo.toml
[INFO] crate git repo https://github.com/ZangaiFamily/matching already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-bigint v0.2.0
[INFO] [stderr]   Downloaded ryu v0.2.5
[INFO] [stderr]   Downloaded serde v1.0.71
[INFO] [stderr]   Downloaded serde_json v1.0.26
[INFO] [stderr]   Downloaded rust_decimal v0.10.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 141adec0ee5b673379d77aa4bf292b66fab97b6cfab2aa3ab772e4e21ada0e00
[INFO] running `Command { std: "docker" "start" "-a" "141adec0ee5b673379d77aa4bf292b66fab97b6cfab2aa3ab772e4e21ada0e00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "141adec0ee5b673379d77aa4bf292b66fab97b6cfab2aa3ab772e4e21ada0e00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "141adec0ee5b673379d77aa4bf292b66fab97b6cfab2aa3ab772e4e21ada0e00", kill_on_drop: false }`
[INFO] [stdout] 141adec0ee5b673379d77aa4bf292b66fab97b6cfab2aa3ab772e4e21ada0e00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 46ee120a8d64abc27dc79db50473c2492f2507c192a18b0695ca14b21d2fce81
[INFO] running `Command { std: "docker" "start" "-a" "46ee120a8d64abc27dc79db50473c2492f2507c192a18b0695ca14b21d2fce81", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling num-bigint v0.2.0
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]    Compiling serde v1.0.71
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]    Compiling ryu v0.2.5
[INFO] [stderr]    Compiling byteorder v1.2.4
[INFO] [stderr]    Compiling itoa v0.4.2
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling rust_decimal v0.10.1
[INFO] [stderr]    Compiling serde_json v1.0.26
[INFO] [stderr]    Compiling matching v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rust_decimal::Decimal`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rust_decimal::Decimal;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error`, `Value`
[INFO] [stdout]  --> src/main.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 | use serde_json::{Value, Error};
[INFO] [stdout]   |                  ^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::read_to_string`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::fs::read_to_string;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::prelude::*`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::io::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufReader`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::io::BufReader;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::LinkedList`
[INFO] [stdout]  --> src/structs/order_book.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::LinkedList;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::Ord`
[INFO] [stdout]  --> src/structs/order_book.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cmp::Ord;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp`
[INFO] [stdout]  --> src/structs/order_book.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::cmp;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rust_decimal::Decimal`
[INFO] [stdout]  --> src/structs/order_book.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rust_decimal::Decimal;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::Ord`
[INFO] [stdout]  --> src/ds/list.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::Ord;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::Ordering`
[INFO] [stdout]  --> src/ds/list.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::cmp::Ordering;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `test::Bencher`
[INFO] [stdout]   --> src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | use test::Bencher;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]   --> src/ds/heap.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let start = 0;
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `consume_limit_orders`
[INFO] [stdout]  --> src/matching/mod.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn consume_limit_orders (order: &mut Order, order_book: &mut OrderBook) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `consume_market_orders`
[INFO] [stdout]   --> src/matching/mod.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn consume_market_orders (order: &mut Order, order_book: &mut OrderBook) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `start_match`
[INFO] [stdout]   --> src/matching/mod.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn start_match (mut order: Order, market: &mut Market) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `subtract_volume`
[INFO] [stdout]   --> src/matching/mod.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub fn subtract_volume(order_a: &mut Order, order_b: &mut Order) -> (bool, bool) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Limit`
[INFO] [stdout]  --> src/structs/order.rs:8:2
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Limit,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `OrderKind` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/structs/order.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(Debug, PartialEq)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Market`
[INFO] [stdout]  --> src/structs/order.rs:9:2
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Market
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `OrderKind` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/structs/order.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(Debug, PartialEq)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Ask`
[INFO] [stdout]   --> src/structs/order.rs:14:2
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Ask,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `OrderSide` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/structs/order.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | #[derive(Debug, PartialEq)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bid`
[INFO] [stdout]   --> src/structs/order.rs:15:2
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Bid
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `OrderSide` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/structs/order.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | #[derive(Debug, PartialEq)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/structs/order.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn new(id: u64, price: &str, volume: &str, kind: OrderKind, side: OrderSide) -> Order {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_fulfilled`
[INFO] [stdout]   --> src/structs/order.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn is_fulfilled(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `volume_remained`
[INFO] [stdout]   --> src/structs/order.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn volume_remained(&self) -> Decimal {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/structs/order_book.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn new(side: OrderSide) -> OrderBook {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_order`
[INFO] [stdout]   --> src/structs/order_book.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn add_order(&mut self, order: Order) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cancel_order`
[INFO] [stdout]   --> src/structs/order_book.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn cancel_order(&mut self, order: Order) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Market`
[INFO] [stdout]  --> src/structs/market.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Market {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/structs/market.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(id: u64) -> Market {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_order`
[INFO] [stdout]   --> src/structs/market.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn add_order(&mut self, order: Order) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cancel_order`
[INFO] [stdout]   --> src/structs/market.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn cancel_order(&mut self, order: Order) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `vec`
[INFO] [stdout]  --> src/ds/heap.rs:8:2
[INFO] [stdout]   |
[INFO] [stdout] 8 |     vec: Vec<T>,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Heap` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/ds/heap.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `map`
[INFO] [stdout]  --> src/ds/heap.rs:9:2
[INFO] [stdout]   |
[INFO] [stdout] 9 |     map: HashMap<u64, usize>
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Heap` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/ds/heap.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/ds/heap.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn new() -> Heap<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parent`
[INFO] [stdout]   --> src/ds/heap.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn parent(&self, idx: usize) -> usize {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `left`
[INFO] [stdout]   --> src/ds/heap.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn left(&self, idx: usize) -> usize {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `right`
[INFO] [stdout]   --> src/ds/heap.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn right(&self, idx: usize) -> usize {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sift_up`
[INFO] [stdout]   --> src/ds/heap.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn sift_up(&mut self, from: usize) -> usize {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sift_down`
[INFO] [stdout]   --> src/ds/heap.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn sift_down(&mut self, from: usize) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> src/ds/heap.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub fn push(&mut self, elem: T) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `swap`
[INFO] [stdout]   --> src/ds/heap.rs:81:9
[INFO] [stdout]    |
[INFO] [stdout] 81 |     pub fn swap(&mut self, idx_a: usize, idx_b: usize) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/ds/heap.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |     pub fn remove(&mut self, id: u64) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek`
[INFO] [stdout]    --> src/ds/heap.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |     pub fn peek(&self) -> Option<&T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_mut`
[INFO] [stdout]    --> src/ds/heap.rs:119:9
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn peek_mut(&mut self) -> Option<&mut T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]    --> src/ds/heap.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |     pub fn pop(&mut self) {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]    --> src/ds/heap.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |     pub fn len(&self) -> usize {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `map`
[INFO] [stdout]  --> src/ds/list.rs:8:2
[INFO] [stdout]   |
[INFO] [stdout] 8 |     map: HashMap<u64, Node<T>>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/ds/list.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `head`
[INFO] [stdout]  --> src/ds/list.rs:9:2
[INFO] [stdout]   |
[INFO] [stdout] 9 |     head: Option<u64>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/ds/list.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tail`
[INFO] [stdout]   --> src/ds/list.rs:10:2
[INFO] [stdout]    |
[INFO] [stdout] 10 |     tail: Option<u64>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ds/list.rs:6:10
[INFO] [stdout]    |
[INFO] [stdout] 6  | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `len`
[INFO] [stdout]   --> src/ds/list.rs:11:2
[INFO] [stdout]    |
[INFO] [stdout] 11 |     len: usize
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ds/list.rs:6:10
[INFO] [stdout]    |
[INFO] [stdout] 6  | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `prev`
[INFO] [stdout]   --> src/ds/list.rs:16:2
[INFO] [stdout]    |
[INFO] [stdout] 16 |     prev: Option<u64>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ds/list.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next`
[INFO] [stdout]   --> src/ds/list.rs:17:2
[INFO] [stdout]    |
[INFO] [stdout] 17 |     next: Option<u64>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ds/list.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]   --> src/ds/list.rs:18:2
[INFO] [stdout]    |
[INFO] [stdout] 18 |     data: T
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ds/list.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/ds/list.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn new() -> List<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/ds/list.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `front`
[INFO] [stdout]   --> src/ds/list.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn front(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `front_mut`
[INFO] [stdout]   --> src/ds/list.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn front_mut(&mut self) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_back`
[INFO] [stdout]   --> src/ds/list.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn push_back(&mut self, elem: T) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/ds/list.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn remove(&mut self, id: u64) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_front`
[INFO] [stdout]   --> src/ds/list.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     pub fn pop_front(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 60 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `matching` due to 2 previous errors; 60 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "46ee120a8d64abc27dc79db50473c2492f2507c192a18b0695ca14b21d2fce81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46ee120a8d64abc27dc79db50473c2492f2507c192a18b0695ca14b21d2fce81", kill_on_drop: false }`
[INFO] [stdout] 46ee120a8d64abc27dc79db50473c2492f2507c192a18b0695ca14b21d2fce81