pot-app/pot-desktop · error

Create Cache Dir Failed

Error message

Create Cache Dir Failed

What it means

In screenshot, after building the app cache path (<cache_dir>/<bundle.identifier>), fs::create_dir_all failed (returned Err) and .expect('Create Cache Dir Failed') panicked. This means the directory could not be created — typically a permissions problem, a read-only filesystem, or a non-directory file already occupying that path — so the screenshot file cannot be written.

Source

Thrown at src-tauri/src/screenshot.rs:20

#[tauri::command]
pub fn screenshot(x: i32, y: i32) {
    use crate::APP;
    use dirs::cache_dir;
    use screenshots::{Compression, Screen};
    use std::fs;
    info!("Screenshot screen with position: x={}, y={}", x, y);
    let screens = Screen::all().unwrap();
    for screen in screens {
        let info = screen.display_info;
        info!("Screen: {:?}", info);
        if info.x == x && info.y == y {
            let handle = APP.get().unwrap();
            let mut app_cache_dir_path = cache_dir().expect("Get Cache Dir Failed");
            app_cache_dir_path.push(&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.png");

            let image = screen.capture().unwrap();
            let buffer = image.to_png(Compression::Fast).unwrap();
            fs::write(app_cache_dir_path, buffer).unwrap();
            break;
        }
    }
}

View on GitHub (pinned to 594d32ede9)

Solutions

1. Check filesystem permissions on the cache directory and that it is writable by the app user
2. Ensure no regular file exists at the target path that blocks directory creation
3. Handle the io::Error (match on kind) and surface it to the frontend instead of panicking
4. Fall back to a temp directory if the cache location is unusable

When it happens

Trigger: Thrown at src-tauri/src/screenshot.rs:20 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/e628e533ef79ef00. Report an issue: GitHub.