[INFO] cloning repository https://github.com/stevebob/realtime-game-experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stevebob/realtime-game-experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevebob%2Frealtime-game-experiment", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevebob%2Frealtime-game-experiment'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 22e7e58ff6dce1c67762c072312f5ab621e8cd2c
[INFO] testing stevebob/realtime-game-experiment against 1.90.0 for beta-1.91-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevebob%2Frealtime-game-experiment" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/stevebob/realtime-game-experiment
[INFO] finished tweaking git repo https://github.com/stevebob/realtime-game-experiment
[INFO] tweaked toml for git repo https://github.com/stevebob/realtime-game-experiment written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/stevebob/realtime-game-experiment on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/stevebob/realtime-game-experiment already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded objc v0.2.2
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[INFO] [stderr]   Downloaded cc v1.0.15
[INFO] [stderr]   Downloaded derivative v1.0.0
[INFO] [stderr]   Downloaded gcc v0.3.54
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[INFO] [stderr]   Downloaded gilrs v0.6.0
[INFO] [stderr]   Downloaded syn v0.10.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 967f434da91b1c1c55a01a878a418d94aff46252d91571bdb0dd5c76da843649
[INFO] running `Command { std: "docker" "start" "-a" "967f434da91b1c1c55a01a878a418d94aff46252d91571bdb0dd5c76da843649", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "967f434da91b1c1c55a01a878a418d94aff46252d91571bdb0dd5c76da843649", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "967f434da91b1c1c55a01a878a418d94aff46252d91571bdb0dd5c76da843649", kill_on_drop: false }`
[INFO] [stdout] 967f434da91b1c1c55a01a878a418d94aff46252d91571bdb0dd5c76da843649
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8dbee78ab3d0b4b2d34a6d8e498229b78cc0bc2da0087727aef6046266a1b508
[INFO] running `Command { std: "docker" "start" "-a" "8dbee78ab3d0b4b2d34a6d8e498229b78cc0bc2da0087727aef6046266a1b508", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling libc v0.2.40
[INFO] [stderr]    Compiling cfg-if v0.1.3
[INFO] [stderr]    Compiling cc v1.0.15
[INFO] [stderr]    Compiling lazy_static v1.0.0
[INFO] [stderr]    Compiling pkg-config v0.3.11
[INFO] [stderr]    Compiling token_store v0.1.2
[INFO] [stderr]    Compiling wayland-scanner v0.12.5
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling remove_dir_all v0.5.1
[INFO] [stderr]    Compiling draw_state v0.8.0
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]    Compiling x11-dl v2.17.5
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]    Compiling wayland-client v0.12.5
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling wayland-protocols v0.12.5
[INFO] [stderr]    Compiling memmap v0.6.2
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling shared_library v0.1.8
[INFO] [stderr]    Compiling gfx_gl v0.5.0
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling tempfile v3.0.2
[INFO] [stderr]    Compiling glutin v0.15.0
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling byteorder v1.2.3
[INFO] [stderr]    Compiling dlib v0.4.1
[INFO] [stderr]    Compiling wayland-sys v0.12.5
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]    Compiling bytes v0.4.7
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling uuid v0.6.3
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling wayland-kbd v0.13.1
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling derivative v1.0.0
[INFO] [stderr]    Compiling gfx_core v0.8.2
[INFO] [stderr]    Compiling wayland-window v0.13.3
[INFO] [stderr]    Compiling winit v0.13.1
[INFO] [stderr]    Compiling gilrs v0.6.0
[INFO] [stderr]    Compiling gfx_device_gl v0.15.2
[INFO] [stderr]    Compiling gfx v0.17.1
[INFO] [stderr]    Compiling gfx_window_glutin v0.23.0
[INFO] [stderr]    Compiling realtime-game-experiment v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `AabbSplitFour` is never constructed
[INFO] [stdout]  --> src/aabb.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct AabbSplitFour {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `from_centre_and_half_size`, `is_intersecting`, `centre`, `split_four`, and `double_about_centre` are never used
[INFO] [stdout]   --> src/aabb.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Aabb {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 17 |     pub fn new(top_left_coord: Vector2<f32>, size: Vector2<f32>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn from_centre_and_half_size(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn is_intersecting(&self, other: &Aabb) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn centre(&self) -> Vector2<f32> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn split_four(&self) -> AabbSplitFour {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub fn double_about_centre(&self) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `entity_id_allocator` is never read
[INFO] [stdout]   --> src/game.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub struct GameState {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 53 |     entity_id_allocator: EntityIdAllocator,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/game.rs:77:22
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn to_render(&self) -> impl Iterator<Item = ToRender> {
[INFO] [stdout]    |                      ^^^^^                          -------- the same lifetime is hidden here
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn to_render(&self) -> impl Iterator<Item = ToRender<'_>> {
[INFO] [stdout]    |                                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 38.10s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.10.8
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "8dbee78ab3d0b4b2d34a6d8e498229b78cc0bc2da0087727aef6046266a1b508", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dbee78ab3d0b4b2d34a6d8e498229b78cc0bc2da0087727aef6046266a1b508", kill_on_drop: false }`
[INFO] [stdout] 8dbee78ab3d0b4b2d34a6d8e498229b78cc0bc2da0087727aef6046266a1b508
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92524fa434b0f45081a7f4ad9cc85588dfd7b40a2be1895c19cb29bcd3913bb1
[INFO] running `Command { std: "docker" "start" "-a" "92524fa434b0f45081a7f4ad9cc85588dfd7b40a2be1895c19cb29bcd3913bb1", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling realtime-game-experiment v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `AabbSplitFour` is never constructed
[INFO] [stdout]  --> src/aabb.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct AabbSplitFour {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `from_centre_and_half_size`, `is_intersecting`, `centre`, `split_four`, and `double_about_centre` are never used
[INFO] [stdout]   --> src/aabb.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Aabb {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 17 |     pub fn new(top_left_coord: Vector2<f32>, size: Vector2<f32>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn from_centre_and_half_size(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn is_intersecting(&self, other: &Aabb) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn centre(&self) -> Vector2<f32> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn split_four(&self) -> AabbSplitFour {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub fn double_about_centre(&self) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `entity_id_allocator` is never read
[INFO] [stdout]   --> src/game.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub struct GameState {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 53 |     entity_id_allocator: EntityIdAllocator,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/game.rs:77:22
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn to_render(&self) -> impl Iterator<Item = ToRender> {
[INFO] [stdout]    |                      ^^^^^                          -------- the same lifetime is hidden here
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn to_render(&self) -> impl Iterator<Item = ToRender<'_>> {
[INFO] [stdout]    |                                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.66s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.10.8
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "92524fa434b0f45081a7f4ad9cc85588dfd7b40a2be1895c19cb29bcd3913bb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92524fa434b0f45081a7f4ad9cc85588dfd7b40a2be1895c19cb29bcd3913bb1", kill_on_drop: false }`
[INFO] [stdout] 92524fa434b0f45081a7f4ad9cc85588dfd7b40a2be1895c19cb29bcd3913bb1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 640f6f6ffbca750edc4482c1df9307884c30345a8022a60a8e9543269027fb32
[INFO] running `Command { std: "docker" "start" "-a" "640f6f6ffbca750edc4482c1df9307884c30345a8022a60a8e9543269027fb32", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr] warning: struct `AabbSplitFour` is never constructed
[INFO] [stderr]  --> src/aabb.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub struct AabbSplitFour {
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `from_centre_and_half_size`, `is_intersecting`, `centre`, `split_four`, and `double_about_centre` are never used
[INFO] [stderr]   --> src/aabb.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 16 | impl Aabb {
[INFO] [stderr]    | --------- associated items in this implementation
[INFO] [stderr] 17 |     pub fn new(top_left_coord: Vector2<f32>, size: Vector2<f32>) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 23 |     pub fn from_centre_and_half_size(
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 31 |     pub fn is_intersecting(&self, other: &Aabb) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 37 |     pub fn centre(&self) -> Vector2<f32> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 40 |     pub fn split_four(&self) -> AabbSplitFour {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 55 |     pub fn double_about_centre(&self) -> Self {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `entity_id_allocator` is never read
[INFO] [stderr]   --> src/game.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 49 | pub struct GameState {
[INFO] [stderr]    |            --------- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 53 |     entity_id_allocator: EntityIdAllocator,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/game.rs:77:22
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn to_render(&self) -> impl Iterator<Item = ToRender> {
[INFO] [stderr]    |                      ^^^^^                          -------- the same lifetime is hidden here
[INFO] [stderr]    |                      |
[INFO] [stderr]    |                      the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn to_render(&self) -> impl Iterator<Item = ToRender<'_>> {
[INFO] [stderr]    |                                                             ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `realtime-game-experiment` (bin "realtime-game-experiment" test) generated 4 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.10.8
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/realtime_game_experiment-853e4c89fe76e5e6)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "640f6f6ffbca750edc4482c1df9307884c30345a8022a60a8e9543269027fb32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "640f6f6ffbca750edc4482c1df9307884c30345a8022a60a8e9543269027fb32", kill_on_drop: false }`
[INFO] [stdout] 640f6f6ffbca750edc4482c1df9307884c30345a8022a60a8e9543269027fb32
