[INFO] updating cached repository xfix/smw-mwl-file-joiner
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/xfix/smw-mwl-file-joiner
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/xfix/smw-mwl-file-joiner" "work/ex/beta-1.38-1/sources/1.37.0/gh/xfix/smw-mwl-file-joiner"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/xfix/smw-mwl-file-joiner'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/xfix/smw-mwl-file-joiner" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/xfix/smw-mwl-file-joiner"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/xfix/smw-mwl-file-joiner'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c7e85080723d70952c7cf2182e6946e38708b8af
[INFO] sha for GitHub repo xfix/smw-mwl-file-joiner: c7e85080723d70952c7cf2182e6946e38708b8af
[INFO] validating manifest of xfix/smw-mwl-file-joiner on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of xfix/smw-mwl-file-joiner on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing xfix/smw-mwl-file-joiner
[INFO] finished frobbing xfix/smw-mwl-file-joiner
[INFO] frobbed toml for xfix/smw-mwl-file-joiner written to work/ex/beta-1.38-1/sources/1.37.0/gh/xfix/smw-mwl-file-joiner/Cargo.toml
[INFO] started frobbing xfix/smw-mwl-file-joiner
[INFO] finished frobbing xfix/smw-mwl-file-joiner
[INFO] frobbed toml for xfix/smw-mwl-file-joiner written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/xfix/smw-mwl-file-joiner/Cargo.toml
[INFO] crate xfix/smw-mwl-file-joiner already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing xfix/smw-mwl-file-joiner against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/xfix/smw-mwl-file-joiner:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] aafbc0a883ece778da6ec386fe6944a1d16b9d83e061d813a2ae7979d334d587
[INFO] running `"docker" "start" "-a" "aafbc0a883ece778da6ec386fe6944a1d16b9d83e061d813a2ae7979d334d587"`
[INFO] [stderr]    Compiling cc v1.0.3
[INFO] [stderr]    Compiling rustc-demangle v0.1.5
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling backtrace v0.3.4
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling smw-mwl-file-joiner v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Rectangle`
[INFO] [stderr]  --> src/entry.rs:2:13
[INFO] [stderr]   |
[INFO] [stderr] 2 | use map16::{Rectangle, Tile};
[INFO] [stderr]   |             ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ByteOrder`, `LE`
[INFO] [stderr]  --> src/entry.rs:4:17
[INFO] [stderr]   |
[INFO] [stderr] 4 | use byteorder::{ByteOrder, LE};
[INFO] [stderr]   |                 ^^^^^^^^^  ^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `failure::Error`
[INFO] [stderr]  --> src/entry.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use failure::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::Path`
[INFO] [stderr]  --> src/entry.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::path::Path;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `failure::Error`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use failure::Error;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dir_entry`
[INFO] [stderr]   --> src/main.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     for dir_entry in fs::read_dir("../entries").unwrap() {
[INFO] [stderr]    |         ^^^^^^^^^ help: consider prefixing with an underscore: `_dir_entry`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `entry`
[INFO] [stderr]   --> src/main.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let entry = Entry::new(&mut database);
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_entry`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cache`
[INFO] [stderr]  --> src/cache.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     cache: HashMap<T, u16>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `current_number`
[INFO] [stderr]  --> src/cache.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     current_number: u16,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_number`
[INFO] [stderr]   --> src/cache.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn get_number(&mut self, elem: T) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `fg`
[INFO] [stderr]  --> src/db.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     fg: Optimizer,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `bg`
[INFO] [stderr]  --> src/db.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     bg: Optimizer,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `exgfx`
[INFO] [stderr]  --> src/db.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     exgfx: Cache<Vec<u8>>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `current_secondary`
[INFO] [stderr]  --> src/db.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     current_secondary: u16,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `current_regular`
[INFO] [stderr]  --> src/db.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     current_regular: u16,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `current_sublevel`
[INFO] [stderr]   --> src/db.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     current_sublevel: u16,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `exgfx_number`
[INFO] [stderr]   --> src/db.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn exgfx_number(&mut self, exgfx: Vec<u8>) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tile_number`
[INFO] [stderr]   --> src/db.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn tile_number(&mut self, tile: Tile) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tile_number_for_rectangle`
[INFO] [stderr]   --> src/db.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn tile_number_for_rectangle(&mut self, rectangle: Rectangle) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_regular`
[INFO] [stderr]   --> src/db.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn next_regular(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_sublevel`
[INFO] [stderr]   --> src/db.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn next_sublevel(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `db`
[INFO] [stderr]   --> src/entry.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     db: &'a mut Database,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `exgfx`
[INFO] [stderr]   --> src/entry.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     exgfx: HashMap<u16, u16>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `tiles`
[INFO] [stderr]   --> src/entry.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     tiles: HashMap<u16, Tile>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Level`
[INFO] [stderr]  --> src/level.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Level<'a> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/level.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn new(bytes: &[u8]) -> Level {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_block`
[INFO] [stderr]   --> src/level.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn read_block(&self, position: usize) -> &[u8] {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_level_number`
[INFO] [stderr]   --> src/level.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn read_level_number(&self) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `next`
[INFO] [stderr]  --> src/map16.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     next: u16,
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `tiles`
[INFO] [stderr]  --> src/map16.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     tiles: HashMap<Tile, u16>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `rectangles`
[INFO] [stderr]  --> src/map16.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     rectangles: HashMap<Rectangle, u16>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `big_tiles`
[INFO] [stderr]  --> src/map16.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     big_tiles: HashSet<u16>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `assign_tile`
[INFO] [stderr]   --> src/map16.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn assign_tile(&mut self, tile: Tile) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `assign_rectangle`
[INFO] [stderr]   --> src/map16.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn assign_rectangle(&mut self, rectangle: Rectangle) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_rectangle_allowed`
[INFO] [stderr]   --> src/map16.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     fn is_rectangle_allowed(&self, rectangle: &Rectangle, next: u16) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/map16.rs:83:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     pub fn new(tile: [u8; 8], behaviour: u16) -> Tile {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/map16.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn new(tiles: Vec<Tile>, width: u8) -> Rectangle {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `height`
[INFO] [stderr]   --> src/map16.rs:99:5
[INFO] [stderr]    |
[INFO] [stderr] 99 |     fn height(&self) -> u8 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.65s
[INFO] running `"docker" "inspect" "aafbc0a883ece778da6ec386fe6944a1d16b9d83e061d813a2ae7979d334d587"`
[INFO] running `"docker" "rm" "-f" "aafbc0a883ece778da6ec386fe6944a1d16b9d83e061d813a2ae7979d334d587"`
[INFO] [stdout] aafbc0a883ece778da6ec386fe6944a1d16b9d83e061d813a2ae7979d334d587
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/xfix/smw-mwl-file-joiner:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 36b88e767e27e41e015ef166ca5eb6edc31dd78aaf4ff484f707c29e1095e9f6
[INFO] running `"docker" "start" "-a" "36b88e767e27e41e015ef166ca5eb6edc31dd78aaf4ff484f707c29e1095e9f6"`
[INFO] [stderr]    Compiling smw-mwl-file-joiner v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Rectangle`
[INFO] [stderr]  --> src/entry.rs:2:13
[INFO] [stderr]   |
[INFO] [stderr] 2 | use map16::{Rectangle, Tile};
[INFO] [stderr]   |             ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ByteOrder`, `LE`
[INFO] [stderr]  --> src/entry.rs:4:17
[INFO] [stderr]   |
[INFO] [stderr] 4 | use byteorder::{ByteOrder, LE};
[INFO] [stderr]   |                 ^^^^^^^^^  ^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `failure::Error`
[INFO] [stderr]  --> src/entry.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use failure::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::Path`
[INFO] [stderr]  --> src/entry.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::path::Path;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `failure::Error`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use failure::Error;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dir_entry`
[INFO] [stderr]   --> src/main.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     for dir_entry in fs::read_dir("../entries").unwrap() {
[INFO] [stderr]    |         ^^^^^^^^^ help: consider prefixing with an underscore: `_dir_entry`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `entry`
[INFO] [stderr]   --> src/main.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let entry = Entry::new(&mut database);
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_entry`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cache`
[INFO] [stderr]  --> src/cache.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     cache: HashMap<T, u16>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `current_number`
[INFO] [stderr]  --> src/cache.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     current_number: u16,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_number`
[INFO] [stderr]   --> src/cache.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn get_number(&mut self, elem: T) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `fg`
[INFO] [stderr]  --> src/db.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     fg: Optimizer,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `bg`
[INFO] [stderr]  --> src/db.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     bg: Optimizer,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `exgfx`
[INFO] [stderr]  --> src/db.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     exgfx: Cache<Vec<u8>>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `current_secondary`
[INFO] [stderr]  --> src/db.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     current_secondary: u16,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `current_regular`
[INFO] [stderr]  --> src/db.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     current_regular: u16,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `current_sublevel`
[INFO] [stderr]   --> src/db.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     current_sublevel: u16,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `exgfx_number`
[INFO] [stderr]   --> src/db.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn exgfx_number(&mut self, exgfx: Vec<u8>) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tile_number`
[INFO] [stderr]   --> src/db.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn tile_number(&mut self, tile: Tile) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tile_number_for_rectangle`
[INFO] [stderr]   --> src/db.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn tile_number_for_rectangle(&mut self, rectangle: Rectangle) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_regular`
[INFO] [stderr]   --> src/db.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn next_regular(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_sublevel`
[INFO] [stderr]   --> src/db.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn next_sublevel(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `db`
[INFO] [stderr]   --> src/entry.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     db: &'a mut Database,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `exgfx`
[INFO] [stderr]   --> src/entry.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     exgfx: HashMap<u16, u16>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `tiles`
[INFO] [stderr]   --> src/entry.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     tiles: HashMap<u16, Tile>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Level`
[INFO] [stderr]  --> src/level.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Level<'a> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/level.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn new(bytes: &[u8]) -> Level {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_block`
[INFO] [stderr]   --> src/level.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn read_block(&self, position: usize) -> &[u8] {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_level_number`
[INFO] [stderr]   --> src/level.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn read_level_number(&self) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.70s
[INFO] running `"docker" "inspect" "36b88e767e27e41e015ef166ca5eb6edc31dd78aaf4ff484f707c29e1095e9f6"`
[INFO] running `"docker" "rm" "-f" "36b88e767e27e41e015ef166ca5eb6edc31dd78aaf4ff484f707c29e1095e9f6"`
[INFO] [stdout] 36b88e767e27e41e015ef166ca5eb6edc31dd78aaf4ff484f707c29e1095e9f6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/xfix/smw-mwl-file-joiner:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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=warn" "-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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 4789f387556038db18783de5a601832c3b9122c0cbb7fe28798ebe13506fe3cb
[INFO] running `"docker" "start" "-a" "4789f387556038db18783de5a601832c3b9122c0cbb7fe28798ebe13506fe3cb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/smw_mwl_file_joiner-6a07c329fba4ad48
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test map16::test::test_optimizer ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "4789f387556038db18783de5a601832c3b9122c0cbb7fe28798ebe13506fe3cb"`
[INFO] running `"docker" "rm" "-f" "4789f387556038db18783de5a601832c3b9122c0cbb7fe28798ebe13506fe3cb"`
[INFO] [stdout] 4789f387556038db18783de5a601832c3b9122c0cbb7fe28798ebe13506fe3cb