[INFO] cloning repository https://github.com/yiblet/tagtask
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yiblet/tagtask" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyiblet%2Ftagtask", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyiblet%2Ftagtask'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3519bafac16bc8275346973c7e679d932b549266
[INFO] checking yiblet/tagtask against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyiblet%2Ftagtask" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yiblet/tagtask
[INFO] finished tweaking git repo https://github.com/yiblet/tagtask
[INFO] tweaked toml for git repo https://github.com/yiblet/tagtask written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yiblet/tagtask on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yiblet/tagtask 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded kdtree v0.5.1
[INFO] [stderr]   Downloaded lazy_static v1.0.2
[INFO] [stderr]   Downloaded derive_builder v0.5.1
[INFO] [stderr]   Downloaded derive_builder_core v0.2.0
[INFO] [stderr]   Downloaded smallvec v0.6.3
[INFO] [stderr]   Downloaded ropey v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe85bc791e9b26221669c996520a3bd49b0fdc432d1ec3a6599e009ec94acc48
[INFO] running `Command { std: "docker" "start" "-a" "fe85bc791e9b26221669c996520a3bd49b0fdc432d1ec3a6599e009ec94acc48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe85bc791e9b26221669c996520a3bd49b0fdc432d1ec3a6599e009ec94acc48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe85bc791e9b26221669c996520a3bd49b0fdc432d1ec3a6599e009ec94acc48", kill_on_drop: false }`
[INFO] [stdout] fe85bc791e9b26221669c996520a3bd49b0fdc432d1ec3a6599e009ec94acc48
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b32854c6eae3684a6babc2703651c653cca0e1fbbb2ba4a4f9b5cd1c96c7e28
[INFO] running `Command { std: "docker" "start" "-a" "1b32854c6eae3684a6babc2703651c653cca0e1fbbb2ba4a4f9b5cd1c96c7e28", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling derive_builder v0.5.1
[INFO] [stderr]     Checking futures v0.1.23
[INFO] [stderr]     Checking lazy_static v1.0.2
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]    Compiling derive_builder_core v0.2.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking smallvec v0.6.3
[INFO] [stderr]     Checking ropey v0.8.1
[INFO] [stderr]     Checking kdtree v0.5.1
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking tagtask v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `SquareBuilder`
[INFO] [stdout]  --> src/view/layout.rs:2:28
[INFO] [stdout]   |
[INFO] [stdout] 2 | use view::widget::{Square, SquareBuilder};
[INFO] [stdout]   |                            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `view::widget::Widget`
[INFO] [stdout]   --> src/view/render.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use view::widget::Widget;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred
[INFO] [stdout]   --> src/pool.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | /     lazy_static! {
[INFO] [stdout] 10 | |         static ref POOL: CpuPool = CpuPool::new_num_cpus();
[INFO] [stdout] 11 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred
[INFO] [stdout]  --> src/view/id.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | / lazy_static!  {
[INFO] [stdout] 8 | |     static ref COUNT : AtomicUsize = AtomicUsize::new(0);
[INFO] [stdout] 9 | | }
[INFO] [stdout]   | |_^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:20:29
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn main() -> Result<(), Box<std::error::Error>> {
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn main() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Id` is never used
[INFO] [stdout]   --> src/view/id.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub trait Id {
[INFO] [stdout]    |           ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fetch` is never used
[INFO] [stdout]   --> src/view/id.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn fetch() -> u64 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Horizontal` is never constructed
[INFO] [stdout]  --> src/view/layout.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Layout {
[INFO] [stdout]   |          ------ variant in this enum
[INFO] [stdout] 6 |     Vertical,
[INFO] [stdout] 7 |     Horizontal,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Layout` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VirtualScreen` is never constructed
[INFO] [stdout]   --> src/view/render.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct VirtualScreen<T: Space> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `insert`, and `in_range` are never used
[INFO] [stdout]   --> src/view/render.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl<T: Space + Id> VirtualScreen<T> {
[INFO] [stdout]    | ------------------------------------ associated items in this implementation
[INFO] [stdout] 17 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn insert(&mut self, x: u16, y: u16, item: Rc<T>) -> Result<(), ErrorKind> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn in_range(&mut self, square: &Square) -> Result<Vec<Rc<T>>, ErrorKind> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `full_width`, `full_height`, `width`, and `height` are never used
[INFO] [stdout]  --> src/view/space.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Space: PartialEq {
[INFO] [stdout]   |           ----- methods in this trait
[INFO] [stdout] 4 |     fn full_width(&self) -> u16;
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 5 |     fn full_height(&self) -> u16;
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 6 |     fn width(&self) -> u16;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 7 |     fn height(&self) -> u16;
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `horizontal` and `vertical` are never used
[INFO] [stdout]   --> src/view/widget.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Square {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] 16 |     pub fn horizontal(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn vertical(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to `<[T; N] as IntoIterator>::into_iter` in Rust 2021
[INFO] [stdout]   --> src/view/render.rs:27:33
[INFO] [stdout]    |
[INFO] [stdout] 27 |         for horiz in [x, right].into_iter() {
[INFO] [stdout]    |                                 ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 27 -         for horiz in [x, right].into_iter() {
[INFO] [stdout] 27 +         for horiz in [x, right].iter() {
[INFO] [stdout]    |
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 27 -         for horiz in [x, right].into_iter() {
[INFO] [stdout] 27 +         for horiz in [x, right] {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to `<[T; N] as IntoIterator>::into_iter` in Rust 2021
[INFO] [stdout]   --> src/view/render.rs:28:34
[INFO] [stdout]    |
[INFO] [stdout] 28 |             for vert in [y, bot].into_iter() {
[INFO] [stdout]    |                                  ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 28 -             for vert in [y, bot].into_iter() {
[INFO] [stdout] 28 +             for vert in [y, bot].iter() {
[INFO] [stdout]    |
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 28 -             for vert in [y, bot].into_iter() {
[INFO] [stdout] 28 +             for vert in [y, bot] {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to `<[T; N] as IntoIterator>::into_iter` in Rust 2021
[INFO] [stdout]   --> src/view/render.rs:51:14
[INFO] [stdout]    |
[INFO] [stdout] 51 |             .into_iter()
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 51 -             .into_iter()
[INFO] [stdout] 51 +             .iter()
[INFO] [stdout]    |
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 50 -         let radius = corners
[INFO] [stdout] 51 -             .into_iter()
[INFO] [stdout] 50 +         let radius = IntoIterator::into_iter(corners)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/view/render.rs:65:21
[INFO] [stdout]    |
[INFO] [stdout] 65 |                     &set.insert(t.id());
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 65 |                     let _ = &set.insert(t.id());
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SquareBuilder`
[INFO] [stdout]  --> src/view/layout.rs:2:28
[INFO] [stdout]   |
[INFO] [stdout] 2 | use view::widget::{Square, SquareBuilder};
[INFO] [stdout]   |                            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `view::widget::Widget`
[INFO] [stdout]   --> src/view/render.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use view::widget::Widget;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred
[INFO] [stdout]   --> src/pool.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | /     lazy_static! {
[INFO] [stdout] 10 | |         static ref POOL: CpuPool = CpuPool::new_num_cpus();
[INFO] [stdout] 11 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred
[INFO] [stdout]  --> src/view/id.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | / lazy_static!  {
[INFO] [stdout] 8 | |     static ref COUNT : AtomicUsize = AtomicUsize::new(0);
[INFO] [stdout] 9 | | }
[INFO] [stdout]   | |_^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:20:29
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn main() -> Result<(), Box<std::error::Error>> {
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn main() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Id` is never used
[INFO] [stdout]   --> src/view/id.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub trait Id {
[INFO] [stdout]    |           ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fetch` is never used
[INFO] [stdout]   --> src/view/id.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn fetch() -> u64 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Horizontal` is never constructed
[INFO] [stdout]  --> src/view/layout.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Layout {
[INFO] [stdout]   |          ------ variant in this enum
[INFO] [stdout] 6 |     Vertical,
[INFO] [stdout] 7 |     Horizontal,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Layout` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VirtualScreen` is never constructed
[INFO] [stdout]   --> src/view/render.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct VirtualScreen<T: Space> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `insert`, and `in_range` are never used
[INFO] [stdout]   --> src/view/render.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl<T: Space + Id> VirtualScreen<T> {
[INFO] [stdout]    | ------------------------------------ associated items in this implementation
[INFO] [stdout] 17 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn insert(&mut self, x: u16, y: u16, item: Rc<T>) -> Result<(), ErrorKind> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn in_range(&mut self, square: &Square) -> Result<Vec<Rc<T>>, ErrorKind> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `full_width`, `full_height`, `width`, and `height` are never used
[INFO] [stdout]  --> src/view/space.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Space: PartialEq {
[INFO] [stdout]   |           ----- methods in this trait
[INFO] [stdout] 4 |     fn full_width(&self) -> u16;
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 5 |     fn full_height(&self) -> u16;
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 6 |     fn width(&self) -> u16;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 7 |     fn height(&self) -> u16;
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `horizontal` and `vertical` are never used
[INFO] [stdout]   --> src/view/widget.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Square {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] 16 |     pub fn horizontal(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn vertical(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to `<[T; N] as IntoIterator>::into_iter` in Rust 2021
[INFO] [stdout]   --> src/view/render.rs:27:33
[INFO] [stdout]    |
[INFO] [stdout] 27 |         for horiz in [x, right].into_iter() {
[INFO] [stdout]    |                                 ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 27 -         for horiz in [x, right].into_iter() {
[INFO] [stdout] 27 +         for horiz in [x, right].iter() {
[INFO] [stdout]    |
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 27 -         for horiz in [x, right].into_iter() {
[INFO] [stdout] 27 +         for horiz in [x, right] {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to `<[T; N] as IntoIterator>::into_iter` in Rust 2021
[INFO] [stdout]   --> src/view/render.rs:28:34
[INFO] [stdout]    |
[INFO] [stdout] 28 |             for vert in [y, bot].into_iter() {
[INFO] [stdout]    |                                  ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 28 -             for vert in [y, bot].into_iter() {
[INFO] [stdout] 28 +             for vert in [y, bot].iter() {
[INFO] [stdout]    |
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 28 -             for vert in [y, bot].into_iter() {
[INFO] [stdout] 28 +             for vert in [y, bot] {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to `<[T; N] as IntoIterator>::into_iter` in Rust 2021
[INFO] [stdout]   --> src/view/render.rs:51:14
[INFO] [stdout]    |
[INFO] [stdout] 51 |             .into_iter()
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 51 -             .into_iter()
[INFO] [stdout] 51 +             .iter()
[INFO] [stdout]    |
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 50 -         let radius = corners
[INFO] [stdout] 51 -             .into_iter()
[INFO] [stdout] 50 +         let radius = IntoIterator::into_iter(corners)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/view/render.rs:65:21
[INFO] [stdout]    |
[INFO] [stdout] 65 |                     &set.insert(t.id());
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 65 |                     let _ = &set.insert(t.id());
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.38s
[INFO] running `Command { std: "docker" "inspect" "1b32854c6eae3684a6babc2703651c653cca0e1fbbb2ba4a4f9b5cd1c96c7e28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b32854c6eae3684a6babc2703651c653cca0e1fbbb2ba4a4f9b5cd1c96c7e28", kill_on_drop: false }`
[INFO] [stdout] 1b32854c6eae3684a6babc2703651c653cca0e1fbbb2ba4a4f9b5cd1c96c7e28
