[INFO] cloning repository https://github.com/FauxFaux/quadrs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FauxFaux/quadrs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFauxFaux%2Fquadrs", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5eb95804ebaf455c6ac5cb503af6cd3323e92cd8
[INFO] building FauxFaux/quadrs against try#334963c956d25708feab489a3816ae63f639355d for pr-135216
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFauxFaux%2Fquadrs" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FauxFaux/quadrs on toolchain 334963c956d25708feab489a3816ae63f639355d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/FauxFaux/quadrs
[INFO] finished tweaking git repo https://github.com/FauxFaux/quadrs
[INFO] tweaked toml for git repo https://github.com/FauxFaux/quadrs written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/FauxFaux/quadrs 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" "+334963c956d25708feab489a3816ae63f639355d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]    Compiling regex v1.10.3
[INFO] [stderr]    Compiling smithay-client-toolkit v0.6.6
[INFO] [stderr]    Compiling octagon v0.1.0 (/opt/rustwide/workdir/octagon)
[INFO] [stdout] warning: unexpected `cfg` condition name: `never`
[INFO] [stdout]   --> octagon/src/bits.rs:37:15
[INFO] [stdout]    |
[INFO] [stdout] 37 |         #[cfg(never)]
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `clippy`, `debug_assertions`, `doc`, `docsrs`, `doctest`, `feature`, `fmt_debug`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `rustfmt`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, and `windows`
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(never)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(never)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `never`
[INFO] [stdout]   --> octagon/src/fft.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 |         #[cfg(never)]
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(never)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(never)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode` is never used
[INFO] [stdout]  --> octagon/src/bits.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn decode(data: &[bool]) -> String {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fmt` is never used
[INFO] [stdout]    --> octagon/src/bits.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn fmt(bits: &[bool]) -> String {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `sample_rate` and `levels` are never read
[INFO] [stdout]   --> octagon/src/fft.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub struct Levels {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 72 |     pub sample_rate: u64,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 73 |     pub vals: Vec<usize>,
[INFO] [stdout] 74 |     pub levels: usize,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Levels` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling smithay-clipboard v0.4.0
[INFO] [stderr]    Compiling copypasta v0.6.3
[INFO] [stderr]    Compiling conrod_core v0.76.1
[INFO] [stderr]    Compiling smithay-client-toolkit v0.12.3
[INFO] [stderr]    Compiling glutin v0.25.1
[INFO] [stderr]    Compiling conrod_glium v0.76.1
[INFO] [stderr]    Compiling quadrs v0.1.0 (/opt/rustwide/workdir/tool)
[INFO] [stdout] warning: unexpected `cfg` condition name: `never`
[INFO] [stdout]    --> tool/src/ui/mod.rs:410:19
[INFO] [stdout]     |
[INFO] [stdout] 410 |             #[cfg(never)]
[INFO] [stdout]     |                   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: expected names are: `clippy`, `debug_assertions`, `doc`, `docsrs`, `doctest`, `feature`, `fmt_debug`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `rustfmt`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, and `windows`
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(never)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(never)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tool/src/ui/mod.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut events_loop = glium::glutin::event_loop::EventLoop::new();
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WindowRef` is never constructed
[INFO] [stdout]   --> tool/src/ui/mod.rs:85:12
[INFO] [stdout]    |
[INFO] [stdout] 85 |     struct WindowRef<'a>(&'a winit::window::Window);
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> tool/src/ui/mod.rs:234:24
[INFO] [stdout]     |
[INFO] [stdout] 234 |               for val in widget::NumberDialer::new(f64::from(params.stride), 1., 4096., 0)
[INFO] [stdout]     |  ________________________^
[INFO] [stdout] 235 | |                 .mid_left_of(ids.buttons)
[INFO] [stdout] 236 | |                 .right_from(ids.stride_down, BUTTON_PAD)
[INFO] [stdout] 237 | |                 .w(64.)
[INFO] [stdout] 238 | |                 .set(ids.stride_label, ui)
[INFO] [stdout]     | |__________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 234 |             while let Some(val) = widget::NumberDialer::new(f64::from(params.stride), 1., 4096., 0)
[INFO] [stdout]     |             ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 234 |             if let Some(val) = widget::NumberDialer::new(f64::from(params.stride), 1., 4096., 0)
[INFO] [stdout]     |             ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: quick-xml v0.22.0
[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" "acd6cc5b8dd13ed45fbd5dd984142b0d3c9636cc45b6050c9b1926a6c3a59c7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acd6cc5b8dd13ed45fbd5dd984142b0d3c9636cc45b6050c9b1926a6c3a59c7d", kill_on_drop: false }`
[INFO] [stdout] acd6cc5b8dd13ed45fbd5dd984142b0d3c9636cc45b6050c9b1926a6c3a59c7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6ed8c5106f6fa75347fda634d87a03d9124ef4ae41e1bb8bd52f58bb5c118b2a
[INFO] running `Command { std: "docker" "start" "-a" "6ed8c5106f6fa75347fda634d87a03d9124ef4ae41e1bb8bd52f58bb5c118b2a", kill_on_drop: false }`
[INFO] [stdout] warning: unexpected `cfg` condition name: `never`
[INFO] [stdout]   --> octagon/src/bits.rs:37:15
[INFO] [stdout]    |
[INFO] [stdout] 37 |         #[cfg(never)]
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `clippy`, `debug_assertions`, `doc`, `docsrs`, `doctest`, `feature`, `fmt_debug`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `rustfmt`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, and `windows`
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(never)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(never)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `never`
[INFO] [stdout]   --> octagon/src/fft.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 |         #[cfg(never)]
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(never)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(never)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode` is never used
[INFO] [stdout]  --> octagon/src/bits.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn decode(data: &[bool]) -> String {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fmt` is never used
[INFO] [stdout]    --> octagon/src/bits.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn fmt(bits: &[bool]) -> String {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `sample_rate` and `levels` are never read
[INFO] [stdout]   --> octagon/src/fft.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub struct Levels {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 72 |     pub sample_rate: u64,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 73 |     pub vals: Vec<usize>,
[INFO] [stdout] 74 |     pub levels: usize,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Levels` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling octagon v0.1.0 (/opt/rustwide/workdir/octagon)
[INFO] [stderr]    Compiling quadrs v0.1.0 (/opt/rustwide/workdir/tool)
[INFO] [stdout] warning: unexpected `cfg` condition name: `never`
[INFO] [stdout]   --> octagon/src/bits.rs:37:15
[INFO] [stdout]    |
[INFO] [stdout] 37 |         #[cfg(never)]
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `clippy`, `debug_assertions`, `doc`, `docsrs`, `doctest`, `feature`, `fmt_debug`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `rustfmt`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, and `windows`
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(never)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(never)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `never`
[INFO] [stdout]   --> octagon/src/fft.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 |         #[cfg(never)]
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(never)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(never)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `never`
[INFO] [stdout]    --> tool/src/ui/mod.rs:410:19
[INFO] [stdout]     |
[INFO] [stdout] 410 |             #[cfg(never)]
[INFO] [stdout]     |                   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: expected names are: `clippy`, `debug_assertions`, `doc`, `docsrs`, `doctest`, `feature`, `fmt_debug`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `rustfmt`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, and `windows`
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(never)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(never)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `sample_rate` and `levels` are never read
[INFO] [stdout]   --> octagon/src/fft.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub struct Levels {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 72 |     pub sample_rate: u64,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 73 |     pub vals: Vec<usize>,
[INFO] [stdout] 74 |     pub levels: usize,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Levels` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tool/src/ui/mod.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut events_loop = glium::glutin::event_loop::EventLoop::new();
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WindowRef` is never constructed
[INFO] [stdout]   --> tool/src/ui/mod.rs:85:12
[INFO] [stdout]    |
[INFO] [stdout] 85 |     struct WindowRef<'a>(&'a winit::window::Window);
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> tool/src/ui/mod.rs:234:24
[INFO] [stdout]     |
[INFO] [stdout] 234 |               for val in widget::NumberDialer::new(f64::from(params.stride), 1., 4096., 0)
[INFO] [stdout]     |  ________________________^
[INFO] [stdout] 235 | |                 .mid_left_of(ids.buttons)
[INFO] [stdout] 236 | |                 .right_from(ids.stride_down, BUTTON_PAD)
[INFO] [stdout] 237 | |                 .w(64.)
[INFO] [stdout] 238 | |                 .set(ids.stride_label, ui)
[INFO] [stdout]     | |__________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 234 |             while let Some(val) = widget::NumberDialer::new(f64::from(params.stride), 1., 4096., 0)
[INFO] [stdout]     |             ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 234 |             if let Some(val) = widget::NumberDialer::new(f64::from(params.stride), 1., 4096., 0)
[INFO] [stdout]     |             ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.34s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: quick-xml v0.22.0
[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" "6ed8c5106f6fa75347fda634d87a03d9124ef4ae41e1bb8bd52f58bb5c118b2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ed8c5106f6fa75347fda634d87a03d9124ef4ae41e1bb8bd52f58bb5c118b2a", kill_on_drop: false }`
[INFO] [stdout] 6ed8c5106f6fa75347fda634d87a03d9124ef4ae41e1bb8bd52f58bb5c118b2a
