[INFO] cloning repository https://github.com/xfix/smw-mwl-file-joiner
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xfix/smw-mwl-file-joiner" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxfix%2Fsmw-mwl-file-joiner", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxfix%2Fsmw-mwl-file-joiner'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c7e85080723d70952c7cf2182e6946e38708b8af
[INFO] checking xfix/smw-mwl-file-joiner against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxfix%2Fsmw-mwl-file-joiner" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xfix/smw-mwl-file-joiner on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/xfix/smw-mwl-file-joiner
[INFO] finished tweaking git repo https://github.com/xfix/smw-mwl-file-joiner
[INFO] tweaked toml for git repo https://github.com/xfix/smw-mwl-file-joiner written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/xfix/smw-mwl-file-joiner already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded synstructure v0.6.1
[INFO] [stderr]   Downloaded libc v0.2.34
[INFO] [stderr]   Downloaded backtrace v0.3.4
[INFO] [stderr]   Downloaded failure_derive v0.1.1
[INFO] [stderr]   Downloaded cc v1.0.3
[INFO] [stderr]   Downloaded failure v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b80c65471fd77eeb81d29f99f12d26d5a352e32f7381a6dadfcae7b65d5ea4f3
[INFO] running `Command { std: "docker" "start" "-a" "b80c65471fd77eeb81d29f99f12d26d5a352e32f7381a6dadfcae7b65d5ea4f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b80c65471fd77eeb81d29f99f12d26d5a352e32f7381a6dadfcae7b65d5ea4f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b80c65471fd77eeb81d29f99f12d26d5a352e32f7381a6dadfcae7b65d5ea4f3", kill_on_drop: false }`
[INFO] [stdout] b80c65471fd77eeb81d29f99f12d26d5a352e32f7381a6dadfcae7b65d5ea4f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9a3be2a83d67aae9cdbec5f76ba787cfb16aabbf8c395ac044506d47b912a154
[INFO] running `Command { std: "docker" "start" "-a" "9a3be2a83d67aae9cdbec5f76ba787cfb16aabbf8c395ac044506d47b912a154", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.34
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]     Checking backtrace v0.3.4
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking smw-mwl-file-joiner v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Rectangle`
[INFO] [stdout]  --> src/entry.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use map16::{Rectangle, Tile};
[INFO] [stdout]   |             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ByteOrder`, `LE`
[INFO] [stdout]  --> src/entry.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | use byteorder::{ByteOrder, LE};
[INFO] [stdout]   |                 ^^^^^^^^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `failure::Error`
[INFO] [stdout]  --> src/entry.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use failure::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/entry.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `failure::Error`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use failure::Error;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Rectangle`
[INFO] [stdout]  --> src/entry.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use map16::{Rectangle, Tile};
[INFO] [stdout]   |             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ByteOrder`, `LE`
[INFO] [stdout]  --> src/entry.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | use byteorder::{ByteOrder, LE};
[INFO] [stdout]   |                 ^^^^^^^^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `failure::Error`
[INFO] [stdout]  --> src/entry.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use failure::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/entry.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `failure::Error`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use failure::Error;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dir_entry`
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     for dir_entry in fs::read_dir("../entries").unwrap() {
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dir_entry`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `entry`
[INFO] [stdout]   --> src/main.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let entry = Entry::new(&mut database);
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_entry`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `cache`
[INFO] [stdout]  --> src/cache.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     cache: HashMap<T, u16>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `current_number`
[INFO] [stdout]  --> src/cache.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     current_number: u16,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_number`
[INFO] [stdout]   --> src/cache.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn get_number(&mut self, elem: T) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fg`
[INFO] [stdout]  --> src/db.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fg: Optimizer,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bg`
[INFO] [stdout]  --> src/db.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     bg: Optimizer,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `exgfx`
[INFO] [stdout]  --> src/db.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     exgfx: Cache<Vec<u8>>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `current_secondary`
[INFO] [stdout]  --> src/db.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     current_secondary: u16,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `current_regular`
[INFO] [stdout]  --> src/db.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     current_regular: u16,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `current_sublevel`
[INFO] [stdout]   --> src/db.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     current_sublevel: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `exgfx_number`
[INFO] [stdout]   --> src/db.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn exgfx_number(&mut self, exgfx: Vec<u8>) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tile_number`
[INFO] [stdout]   --> src/db.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn tile_number(&mut self, tile: Tile) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tile_number_for_rectangle`
[INFO] [stdout]   --> src/db.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn tile_number_for_rectangle(&mut self, rectangle: Rectangle) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_regular`
[INFO] [stdout]   --> src/db.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn next_regular(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_sublevel`
[INFO] [stdout]   --> src/db.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn next_sublevel(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `db`
[INFO] [stdout]   --> src/entry.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     db: &'a mut Database,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `exgfx`
[INFO] [stdout]   --> src/entry.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     exgfx: HashMap<u16, u16>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tiles`
[INFO] [stdout]   --> src/entry.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     tiles: HashMap<u16, Tile>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Level`
[INFO] [stdout]  --> src/level.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Level<'a> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/level.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn new(bytes: &[u8]) -> Level {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_block`
[INFO] [stdout]   --> src/level.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn read_block(&self, position: usize) -> &[u8] {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_level_number`
[INFO] [stdout]   --> src/level.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn read_level_number(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next`
[INFO] [stdout]  --> src/map16.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     next: u16,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tiles`
[INFO] [stdout]  --> src/map16.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     tiles: HashMap<Tile, u16>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rectangles`
[INFO] [stdout]  --> src/map16.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     rectangles: HashMap<Rectangle, u16>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `big_tiles`
[INFO] [stdout]  --> src/map16.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     big_tiles: HashSet<u16>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `assign_tile`
[INFO] [stdout]   --> src/map16.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn assign_tile(&mut self, tile: Tile) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `assign_rectangle`
[INFO] [stdout]   --> src/map16.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn assign_rectangle(&mut self, rectangle: Rectangle) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_rectangle_allowed`
[INFO] [stdout]   --> src/map16.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 |     fn is_rectangle_allowed(&self, rectangle: &Rectangle, next: u16) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/map16.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn new(tile: [u8; 8], behaviour: u16) -> Tile {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/map16.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn new(tiles: Vec<Tile>, width: u8) -> Rectangle {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `height`
[INFO] [stdout]   --> src/map16.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn height(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 39 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dir_entry`
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     for dir_entry in fs::read_dir("../entries").unwrap() {
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dir_entry`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `entry`
[INFO] [stdout]   --> src/main.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let entry = Entry::new(&mut database);
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_entry`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `cache`
[INFO] [stdout]  --> src/cache.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     cache: HashMap<T, u16>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `current_number`
[INFO] [stdout]  --> src/cache.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     current_number: u16,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_number`
[INFO] [stdout]   --> src/cache.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn get_number(&mut self, elem: T) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fg`
[INFO] [stdout]  --> src/db.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fg: Optimizer,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bg`
[INFO] [stdout]  --> src/db.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     bg: Optimizer,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `exgfx`
[INFO] [stdout]  --> src/db.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     exgfx: Cache<Vec<u8>>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `current_secondary`
[INFO] [stdout]  --> src/db.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     current_secondary: u16,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `current_regular`
[INFO] [stdout]  --> src/db.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     current_regular: u16,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `current_sublevel`
[INFO] [stdout]   --> src/db.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     current_sublevel: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `exgfx_number`
[INFO] [stdout]   --> src/db.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn exgfx_number(&mut self, exgfx: Vec<u8>) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tile_number`
[INFO] [stdout]   --> src/db.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn tile_number(&mut self, tile: Tile) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tile_number_for_rectangle`
[INFO] [stdout]   --> src/db.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn tile_number_for_rectangle(&mut self, rectangle: Rectangle) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_regular`
[INFO] [stdout]   --> src/db.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn next_regular(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_sublevel`
[INFO] [stdout]   --> src/db.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn next_sublevel(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `db`
[INFO] [stdout]   --> src/entry.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     db: &'a mut Database,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `exgfx`
[INFO] [stdout]   --> src/entry.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     exgfx: HashMap<u16, u16>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tiles`
[INFO] [stdout]   --> src/entry.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     tiles: HashMap<u16, Tile>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Level`
[INFO] [stdout]  --> src/level.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Level<'a> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/level.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn new(bytes: &[u8]) -> Level {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_block`
[INFO] [stdout]   --> src/level.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn read_block(&self, position: usize) -> &[u8] {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_level_number`
[INFO] [stdout]   --> src/level.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn read_level_number(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.76s
[INFO] running `Command { std: "docker" "inspect" "9a3be2a83d67aae9cdbec5f76ba787cfb16aabbf8c395ac044506d47b912a154", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a3be2a83d67aae9cdbec5f76ba787cfb16aabbf8c395ac044506d47b912a154", kill_on_drop: false }`
[INFO] [stdout] 9a3be2a83d67aae9cdbec5f76ba787cfb16aabbf8c395ac044506d47b912a154