bind_context called while the SlintContext is still alive

Error message

bind_context called while the SlintContext is still alive

What it means

Error "bind_context called while the SlintContext is still alive" thrown in slint-ui/slint.

Source

Thrown at internal/backends/android-activity/lib.rs:182

        }
    }

    fn clipboard_text(&self, clipboard: Clipboard) -> Option<String> {
        if clipboard == Clipboard::DefaultClipboard {
            Some(
                self.window
                    .java_helper
                    .get_clipboard()
                    .unwrap_or_else(|e| javahelper::print_jni_error(&self.app, e)),
            )
        } else {
            None
        }
    }

    fn bind_context(&self, ctx: i_slint_core::SlintContextWeak, _: i_slint_core::InternalToken) {
        let _ = self.context.set(ctx.clone());
        let ctx = ctx.upgrade().expect("bind_context called while the SlintContext is still alive");
        let color_scheme = match self
            .window
            .java_helper
            .color_scheme()
            .unwrap_or_else(|e| javahelper::print_jni_error(&self.app, e))
        {
            0x10 => i_slint_core::items::ColorScheme::Light, // UI_MODE_NIGHT_NO
            0x20 => i_slint_core::items::ColorScheme::Dark,  // UI_MODE_NIGHT_YES
            _ => i_slint_core::items::ColorScheme::Unknown,
        };
        ctx.set_color_scheme(color_scheme);
        if let Ok(accent) = self.window.java_helper.accent_color() {
            ctx.set_accent_color(accent);
        }
        if let Ok(scale) = self.window.java_helper.font_scale()
            && let Some(size) = javahelper::font_scale_to_logical_length(scale)
        {
            ctx.set_platform_default_font_size(Some(size));

View on GitHub (pinned to 3fd8f2ec03)

Solutions

Drop the previous SlintContext before binding a new context.
Do not call bind_context twice for the same platform.

When it happens

Trigger: Thrown at internal/backends/android-activity/lib.rs:182 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/56f87b5f6fbad3d9. Report an issue: GitHub.