[INFO] fetching crate dioxus-webview 0.0.0...
[INFO] building dioxus-webview-0.0.0 against master#ff34b919075f35a1787659e9c448a34b06bab8de for issue-85264
[INFO] extracting crate dioxus-webview 0.0.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate dioxus-webview 0.0.0 on toolchain ff34b919075f35a1787659e9c448a34b06bab8de
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dioxus-webview 0.0.0
[INFO] finished tweaking crates.io crate dioxus-webview 0.0.0
[INFO] tweaked toml for crates.io crate dioxus-webview 0.0.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate dioxus-webview 0.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 660a218f3252b9d6afc32d8a59db6b1cf3a14c649083f4aef38810970ec61d2d
[INFO] running `Command { std: "docker" "start" "-a" "660a218f3252b9d6afc32d8a59db6b1cf3a14c649083f4aef38810970ec61d2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "660a218f3252b9d6afc32d8a59db6b1cf3a14c649083f4aef38810970ec61d2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "660a218f3252b9d6afc32d8a59db6b1cf3a14c649083f4aef38810970ec61d2d", kill_on_drop: false }`
[INFO] [stdout] 660a218f3252b9d6afc32d8a59db6b1cf3a14c649083f4aef38810970ec61d2d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce600e98e1d8b1c7d0f5aee1fa859e437c41a35ae8953c0e625ffb1c297266bc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ce600e98e1d8b1c7d0f5aee1fa859e437c41a35ae8953c0e625ffb1c297266bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling once_cell v1.7.0
[INFO] [stderr]    Compiling futures-core v0.3.13
[INFO] [stderr]    Compiling pin-project-lite v0.2.4
[INFO] [stderr]    Compiling futures-io v0.3.13
[INFO] [stderr]    Compiling fastrand v1.4.0
[INFO] [stderr]    Compiling vec-arena v1.0.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling argh_shared v0.1.4
[INFO] [stderr]    Compiling urlencoding v1.1.1
[INFO] [stderr]    Compiling bumpalo v3.6.1
[INFO] [stderr]    Compiling boxfnonce v0.1.1
[INFO] [stderr]    Compiling dioxus-webview v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling longest-increasing-subsequence v0.1.0
[INFO] [stderr]    Compiling id-arena v2.2.1
[INFO] [stderr]    Compiling webkit2gtk-sys v0.12.0
[INFO] [stderr]    Compiling webview-sys v0.6.2
[INFO] [stderr]    Compiling tinyfiledialogs v3.3.10
[INFO] [stderr]    Compiling async-lock v2.3.0
[INFO] [stderr]    Compiling generational-arena v0.2.8
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]    Compiling toolshed v0.8.1
[INFO] [stderr]    Compiling thread_local v1.1.3
[INFO] [stderr]    Compiling async-channel v1.6.1
[INFO] [stderr]    Compiling futures-lite v1.11.3
[INFO] [stderr]    Compiling regex v1.4.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling socket2 v0.3.19
[INFO] [stderr]    Compiling javascriptcore-rs-sys v0.2.0
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling blocking v1.0.2
[INFO] [stderr]    Compiling async-executor v1.4.0
[INFO] [stderr]    Compiling nb-connect v1.0.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]    Compiling ctor v0.1.19
[INFO] [stderr]    Compiling fstrings-proc-macro v0.2.3
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]    Compiling argh_derive v0.1.4
[INFO] [stderr]    Compiling dioxus-core-macro v0.1.1
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.6
[INFO] [stderr]    Compiling fstrings v0.2.3
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling polling v2.0.2
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling fern v0.6.0
[INFO] [stderr]    Compiling async-io v1.3.1
[INFO] [stderr]    Compiling pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling argh v0.1.4
[INFO] [stderr]    Compiling async-global-executor v2.0.2
[INFO] [stderr]    Compiling async-std v1.9.0
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling dioxus-core v0.1.2
[INFO] [stderr] =>
[INFO] [stderr] format_args ! ("hello")
[INFO] [stderr] -------------------
[INFO] [stderr] 
[INFO] [stderr]    Compiling system-deps v1.3.2
[INFO] [stderr]    Compiling glib-sys v0.10.1
[INFO] [stderr]    Compiling gobject-sys v0.10.0
[INFO] [stderr]    Compiling gio-sys v0.10.1
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.10.0
[INFO] [stderr]    Compiling cairo-sys-rs v0.10.0
[INFO] [stderr]    Compiling pango-sys v0.10.0
[INFO] [stderr]    Compiling atk-sys v0.10.0
[INFO] [stderr]    Compiling gdk-sys v0.10.0
[INFO] [stderr]    Compiling soup-sys v0.10.0
[INFO] [stderr]    Compiling gtk-sys v0.10.0
[INFO] [stderr]    Compiling web-view v0.7.3
[INFO] [stdout] warning: unused import: `WebViewBuilder`
[INFO] [stdout]  --> src/lib.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 6 | use web_view::{WVResult, WebView, WebViewBuilder};
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> src/lib.rs:79:17
[INFO] [stdout]    |
[INFO] [stdout] 79 | /                 if let InnerEvent::Initiate(handle) = event {
[INFO] [stdout] 80 | |                     let editlist = ref_edits.clone();
[INFO] [stdout] 81 | |                     handle
[INFO] [stdout] 82 | |                         .dispatch(move |view| {
[INFO] [stdout] ...  |
[INFO] [stdout] 85 | |                         .expect("Dispatch failed");
[INFO] [stdout] 86 | |                 }
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg`
[INFO] [stdout]   --> src/lib.rs:49:36
[INFO] [stdout]    |
[INFO] [stdout] 49 |             .invoke_handler(|view, arg| {
[INFO] [stdout]    |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `builder`
[INFO] [stdout]   --> src/lib.rs:95:29
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn new(root: FC<T>, builder: impl FnOnce() -> WVResult<WebView<'static, ()>>) -> Self {
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_builder`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_val`
[INFO] [stdout]    --> src/lib.rs:106:30
[INFO] [stdout]     |
[INFO] [stdout] 106 |     pub fn update(&mut self, new_val: T) {
[INFO] [stdout]     |                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `modifier`
[INFO] [stdout]    --> src/lib.rs:111:34
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn update_mut(&mut self, modifier: impl Fn(&mut T)) {
[INFO] [stdout]     |                                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_modifier`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `root`
[INFO] [stdout]   --> src/lib.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     root: FC<T>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 05s
[INFO] running `Command { std: "docker" "inspect" "ce600e98e1d8b1c7d0f5aee1fa859e437c41a35ae8953c0e625ffb1c297266bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce600e98e1d8b1c7d0f5aee1fa859e437c41a35ae8953c0e625ffb1c297266bc", kill_on_drop: false }`
[INFO] [stdout] ce600e98e1d8b1c7d0f5aee1fa859e437c41a35ae8953c0e625ffb1c297266bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 23fb93137fc16769de322a49dd4520085f8bad6a751f1db9b243cfd537339087
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "23fb93137fc16769de322a49dd4520085f8bad6a751f1db9b243cfd537339087", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `WebViewBuilder`
[INFO] [stdout]  --> src/lib.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 6 | use web_view::{WVResult, WebView, WebViewBuilder};
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> src/lib.rs:79:17
[INFO] [stdout]    |
[INFO] [stdout] 79 | /                 if let InnerEvent::Initiate(handle) = event {
[INFO] [stdout] 80 | |                     let editlist = ref_edits.clone();
[INFO] [stdout] 81 | |                     handle
[INFO] [stdout] 82 | |                         .dispatch(move |view| {
[INFO] [stdout] ...  |
[INFO] [stdout] 85 | |                         .expect("Dispatch failed");
[INFO] [stdout] 86 | |                 }
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg`
[INFO] [stdout]   --> src/lib.rs:49:36
[INFO] [stdout]    |
[INFO] [stdout] 49 |             .invoke_handler(|view, arg| {
[INFO] [stdout]    |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `builder`
[INFO] [stdout]   --> src/lib.rs:95:29
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn new(root: FC<T>, builder: impl FnOnce() -> WVResult<WebView<'static, ()>>) -> Self {
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_builder`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_val`
[INFO] [stdout]    --> src/lib.rs:106:30
[INFO] [stdout]     |
[INFO] [stdout] 106 |     pub fn update(&mut self, new_val: T) {
[INFO] [stdout]     |                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `modifier`
[INFO] [stdout]    --> src/lib.rs:111:34
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn update_mut(&mut self, modifier: impl Fn(&mut T)) {
[INFO] [stdout]     |                                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_modifier`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `root`
[INFO] [stdout]   --> src/lib.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     root: FC<T>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] =>
[INFO] [stderr] format_args ! ("hello")
[INFO] [stderr] -------------------
[INFO] [stderr] 
[INFO] [stderr]    Compiling dioxus-webview v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] =>
[INFO] [stderr] format_args ! ("Jon\'s awesome site!!11")
[INFO] [stderr] -------------------
[INFO] [stderr] 
[INFO] [stderr] =>
[INFO] [stderr] format_args ! ("He worked so hard on it :)")
[INFO] [stderr] -------------------
[INFO] [stderr] 
[INFO] [stderr] =>
[INFO] [stderr] format_args ! ("1337")
[INFO] [stderr] -------------------
[INFO] [stderr] 
[INFO] [stderr] =>
[INFO] [stderr] format_args ! ("Legit made my own React")
[INFO] [stderr] -------------------
[INFO] [stderr] 
[INFO] [stdout] warning: static variable `Example` should have an upper case name
[INFO] [stdout]   --> examples/demo.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | static Example: FC<()> = |ctx, _props| {
[INFO] [stdout]    |        ^^^^^^^ help: convert the identifier to upper case: `EXAMPLE`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `WebViewBuilder`
[INFO] [stdout]  --> src/lib.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 6 | use web_view::{WVResult, WebView, WebViewBuilder};
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> src/lib.rs:79:17
[INFO] [stdout]    |
[INFO] [stdout] 79 | /                 if let InnerEvent::Initiate(handle) = event {
[INFO] [stdout] 80 | |                     let editlist = ref_edits.clone();
[INFO] [stdout] 81 | |                     handle
[INFO] [stdout] 82 | |                         .dispatch(move |view| {
[INFO] [stdout] ...  |
[INFO] [stdout] 85 | |                         .expect("Dispatch failed");
[INFO] [stdout] 86 | |                 }
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg`
[INFO] [stdout]   --> src/lib.rs:49:36
[INFO] [stdout]    |
[INFO] [stdout] 49 |             .invoke_handler(|view, arg| {
[INFO] [stdout]    |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `builder`
[INFO] [stdout]   --> src/lib.rs:95:29
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn new(root: FC<T>, builder: impl FnOnce() -> WVResult<WebView<'static, ()>>) -> Self {
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_builder`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_val`
[INFO] [stdout]    --> src/lib.rs:106:30
[INFO] [stdout]     |
[INFO] [stdout] 106 |     pub fn update(&mut self, new_val: T) {
[INFO] [stdout]     |                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `modifier`
[INFO] [stdout]    --> src/lib.rs:111:34
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn update_mut(&mut self, modifier: impl Fn(&mut T)) {
[INFO] [stdout]     |                                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_modifier`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `root`
[INFO] [stdout]   --> src/lib.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     root: FC<T>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.41s
[INFO] running `Command { std: "docker" "inspect" "23fb93137fc16769de322a49dd4520085f8bad6a751f1db9b243cfd537339087", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23fb93137fc16769de322a49dd4520085f8bad6a751f1db9b243cfd537339087", kill_on_drop: false }`
[INFO] [stdout] 23fb93137fc16769de322a49dd4520085f8bad6a751f1db9b243cfd537339087
