Repository: tauri
Issue: [bug] unsafe precondition(s) violated: slice::from_raw_parts requires the pointer to be aligned and non-null, and the total size of the slice not to exceed `isize::MAX`
Labels: type: bug,status: needs triage

### Describe the bug

tauri app crashes with:

```
thread 'main' panicked at core/src/panicking.rs:221:5:
unsafe precondition(s) violated: slice::from_raw_parts requires the pointer to be aligned and non-null, and the total size of the slice not to exceed `isize::MAX`
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread caused non-unwinding panic. aborting.
```

when i call this command:

```rs
#[tauri::command]
pub async fn open_pipe_window(
    app_handle: tauri::AppHandle<tauri::Wry>,
    port: u16,
    title: String,
) -> Result<(), String> {
    // Close existing window if it exists
    if let Some(existing_window) = app_handle.get_webview_window(&title) {
        if let Err(e) = existing_window.destroy() {
            error!("failed to destroy existing window: {}", e);
        }
        tokio::time::sleep(tokio::time::Duration::from_millis(100)).await;
    }

    let window = match tauri::WebviewWindowBuilder::new(
        &app_handle,
        &title,
        tauri::WebviewUrl::External(format!("http://localhost:{}", port).parse().unwrap()),
    )
    .title(title)
    .inner_size(1200.0, 850.0)
    .always_on_top(true)
    .visible_on_all_workspaces(true)
    .build()
    {
        Ok(window) => window,
        Err(e) => {
            error!("failed to create window: {}", e);
            return Err(format!("failed to create window: {}", e));
        }
    };

    // Only try to manipulate window if creation succeeded
    if let Err(e) = window.set_focus() {
        error!("failed to set window focus: {}", e);
    }
    if let Err(e) = window.show() {
        error!("failed to show window: {}", e);
    }

    #[cfg(target_os = "macos")]
    if let Err(e) = app_handle.set_activation_policy(tauri::ActivationPolicy::Accessory) {
        error!("failed to set activation policy: {}", e);
    }

    Ok(())
}

```

note that this is non deterministic :/

most of the time it works, 5-10% of the time it crashes :(

### Reproduction

n/a

### Expected behavior

_No response_

### Full `tauri info` output

```text
(base) louisbeaumont@MacBook-Pro-2:~/Documents/screenpipe/screenpipe-app-tauri$ bun tauri info
$ tauri info
WARNING: Only one package manager should be used, but found bun and npm.
         Please remove unused package manager lock files, will use bun for now!

[✔] Environment
    - OS: Mac OS 15.1.0 arm64 (X64)
    ✔ Xcode Command Line Tools: installed
    ✔ rustc: 1.83.0 (90b35a623 2024-11-26)
    ✔ cargo: 1.83.0 (5ffbef321 2024-10-29)
    ✔ rustup: 1.27.1 (54dd3d00f 2024-04-24)
    ✔ Rust toolchain: stable-aarch64-apple-darwin (default)
    - node: 20.9.0
    - pnpm: 9.14.4
    - yarn: 1.22.19
    - npm: 10.1.0
    - bun: 1.1.38
    - deno: deno 2.0.2

[-] Packages
    - tauri 🦀: 2.1.1
    - tauri-build 🦀: 2.0.3
    - wry 🦀: 0.47.2
    - tao 🦀: 0.30.8
    - tauri-cli 🦀: 1.6.2
    - @tauri-apps/api : 2.1.1
    - @tauri-apps/cli : 2.1.0

[-] Plugins
    - tauri-plugin-store 🦀: 2.2.0
    - @tauri-apps/plugin-store : 2.2.0
    - tauri-plugin-deep-link 🦀: 2.2.0
    - @tauri-apps/plugin-deep-link : 2.2.0
    - tauri-plugin-autostart 🦀: 2.0.0
    - @tauri-apps/plugin-autostart : not installed!
    - tauri-plugin-os 🦀: 2.0.0
    - @tauri-apps/plugin-os : 2.0.0 (outdated, latest: 2.2.0)
    - tauri-plugin-fs 🦀: 2.0.0
    - @tauri-apps/plugin-fs : 2.0.0 (outdated, latest: 2.2.0)
    - tauri-plugin-notification 🦀: 2.0.0
    - @tauri-apps/plugin-notification : 2.0.0 (outdated, latest: 2.2.0)
    - tauri-plugin-updater 🦀: 2.0.1
    - @tauri-apps/plugin-updater : 2.0.0 (outdated, latest: 2.3.0)
    - tauri-plugin-dialog 🦀: 2.0.0
    - @tauri-apps/plugin-dialog : 2.0.0 (outdated, latest: 2.2.0)
    - tauri-plugin-http 🦀: 2.0.0
    - @tauri-apps/plugin-http : 2.2.0
    - tauri-plugin-shell 🦀: 2.0.0
    - @tauri-apps/plugin-shell : 2.0.0 (outdated, latest: 2.2.0)
    - tauri-plugin-global-shortcut 🦀: 2.0.0
    - @tauri-apps/plugin-global-shortcut : 2.0.0 (outdated, latest: 2.2.0)
    - tauri-plugin-cli 🦀: 2.0.0
    - @tauri-apps/plugin-cli : 2.0.0 (outdated, latest: 2.2.0)
    - tauri-plugin-single-instance 🦀: 2.0.0
    - @tauri-apps/plugin-single-instance : not installed!
    - tauri-plugin-process 🦀: 2.0.0
    - @tauri-apps/plugin-process : 2.0.0 (outdated, latest: 2.2.0)

[-] App
    - build-type: bundle
    - CSP: unset
    - frontendDist: ../out
    - devUrl: http://localhost:3000/
    - framework: React (Next.js)
    - bundler: Webpack
```


### Stack trace

_No response_

### Additional context

my users run a bunch of nextjs apps that i embed in tauri webviews that's why the localhost thing