[bug] on macOS call systray set_icon will cause memory leak

[zangdale]

Describe the bug

I want to change the icon on notifications area, I found that each calling method "app.tray_handle().set_icon(tauri::Icon::Raw(include_bytes!("../icons/2.png").to_vec())).unwrap();" will increase memory.

loop {
                    let icon_row = icons.get(i % icons_len);
                    if let Some(v) = icon_row {
                        app.tray_handle().set_icon(v.clone()).unwrap();
                    } else {
                        println!("Failed to open the file.");
                    }
                    i = i + 1;
                    if i == icons_len {
                        i = 0;
                    }
                    thread::sleep(ten_millis);
}

Reproduction

Continuous calls “set_icon()”

Expected behavior

No memory leaks

Platform and versions

cargo tauri info

Environment
› OS: Mac OS 12.6.0 X64
› Node.js: 16.17.0
› npm: 8.15.0
› pnpm: Not installed!
› yarn: 1.22.19
› rustup: 1.25.1
› rustc: 1.63.0
› cargo: 1.63.0
› Rust toolchain: stable-x86_64-apple-darwin

Packages
› @tauri-apps/cli [NPM]: 1.1.1
› @tauri-apps/api [NPM]: 1.1.0
› tauri [RUST]: 1.1.1,
› tauri-build [RUST]: 1.1.0,
› tao [RUST]: 0.14.0,
› wry [RUST]: 0.21.1,

App
› build-type: bundle
› CSP: unset
› distDir: ../dist
› devPath: http://localhost:1420/
› framework: Vue.js

App directory structure
├─ dist
├─ resources
├─ node_modules
├─ public
├─ runcat.app
├─ src-tauri
├─ .git
├─ .vscode
├─ .idea
└─ src

Stack trace

No response

Additional context

Other languages have similar problems：
getlantern/systray#135

[zangdale]

[haselkern]

This is not only limited to set_icon. I'm noticing similar behavior when calling set_title and set_menu.

[dustinblackman]

Currently able to repro on MacOS using Tauri 1.6.7, where each update I push to my tray adds nearly 1MB of memory that never frees. It's unclear why values passed in to set_icon + friends do not properly drop memory after they're replaced. I've dug a bit and haven't found anything so far. I'm wondering if this is happening outside of rust and in the OS bindings instead?

[dustinblackman]

Digging deeper it looks like this may be the cause:

SSheldon/rust-objc#80

Possible alternative here that may solve this in the future tauri-apps/wry#1239

Specifically for tray icon: tauri-apps/tray-icon#172