pot-app/pot-desktop · error

Get Cache Dir Failed

Error message

Get Cache Dir Failed

What it means

In the macOS branch of ocr_recognize(), dirs::cache_dir() returned None and .expect('Get Cache Dir Failed') panicked. Without a cache directory the app cannot store/read the screenshot cut used for OCR, so OCR recognition cannot proceed; this fires when the OS gives no user cache path (unusual HOME/library configuration).

Source

Thrown at src-tauri/src/window.rs:339

    {
        let monitor = window.current_monitor().unwrap().unwrap();
        let size = monitor.size();
        window.set_decorations(false).unwrap();
        window.set_size(*size).unwrap();
    }

    #[cfg(not(target_os = "macos"))]
    window.set_fullscreen(true).unwrap();

    window.set_always_on_top(true).unwrap();
    window
}

pub fn ocr_recognize() {
    #[cfg(target_os = "macos")]
    {
        let app_handle = APP.get().unwrap();
        let mut app_cache_dir_path = cache_dir().expect("Get Cache Dir Failed");
        app_cache_dir_path.push(&app_handle.config().tauri.bundle.identifier);
        if !app_cache_dir_path.exists() {
            // 创建目录
            fs::create_dir_all(&app_cache_dir_path).expect("Create Cache Dir Failed");
        }
        app_cache_dir_path.push("pot_screenshot_cut.png");

        let path = app_cache_dir_path.to_string_lossy().replace("\\\\?\\", "");
        println!("Screenshot path: {}", path);
        if let Ok(_output) = std::process::Command::new("/usr/sbin/screencapture")
            .arg("-i")
            .arg("-r")
            .arg(path)
            .output()
        {
            recognize_window();
        }
    }

View on GitHub (pinned to 594d32ede9)

Solutions

1. Ensure HOME is set and the user Library/Caches location is accessible on macOS
2. Use std::env::temp_dir() or dirs::home_dir().join("Library/Caches") as a fallback
3. Refactor to propagate a Result and notify the caller (handle_ocr_recognize/tray handlers) instead of panicking

When it happens

Trigger: Thrown at src-tauri/src/window.rs:339 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of pot-app/pot-desktop@594d32ede9 (2026-09-02). Data as JSON: /api/errors/b05273f954608838. Report an issue: GitHub.