slint-ui/slint · error · std::io::Error

Connection is no longer available

Error message

Connection is no longer available

What it means

Error "Connection is no longer available" thrown in slint-ui/slint.

Source

Thrown at internal/live-preview/remote/compilation.rs:21

use std::rc::Weak;

use i_slint_core::InternalToken;
use lsp_types::Url;

use super::connection::Connection;

pub fn init_compiler(connection: Weak<Connection>) -> slint_interpreter::Compiler {
    let mut compiler = slint_interpreter::Compiler::new();

    let file_loader_connection = connection.clone();
    compiler.set_file_loader(move |path: &std::path::Path| {
        let url = Url::from_file_path(path);
        let path_display = path.display().to_string();
        let connection = file_loader_connection.clone();
        Box::pin(async move {
            let Some(connection) = connection.upgrade() else {
                return Some(Err(std::io::Error::new(
                    std::io::ErrorKind::BrokenPipe,
                    "Connection is no longer available",
                )));
            };
            let Ok(url) = url else {
                return Some(Err(std::io::Error::new(
                    std::io::ErrorKind::InvalidInput,
                    format!("Not an absolute file path: {path_display}"),
                )));
            };
            Some(
                connection.request_file(url).await.map(|file_content| {
                    String::from_utf8_lossy(&file_content.contents).to_string()
                }),
            )
        })
    });

View on GitHub (pinned to 3fd8f2ec03)

Solutions

1. Reconnect the live-preview remote connection and retry the operation.
2. Check the network/WebSocket between the viewer and the remote side.

When it happens

Trigger: Thrown at internal/live-preview/remote/compilation.rs:21 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of slint-ui/slint@3fd8f2ec03 (2026-08-19). Data as JSON: /api/errors/8ad10f2df8ae0667. Report an issue: GitHub.