Calling PopupWindow show() in a init callback causes "Recursion Detected" panics

[NigelBreslaw]

This code panics: (Recursion detected)

component Demo { 
    popup := PopupWindow {  }
    init => popup.show();
}

(at least on slintpad)

Original Bug Description

See the example below. Not only does it not work the entire WASM side of slintpad seems to have locked up. You cannot open/close the console.

Reproducible Code (if applicable)

Visit
https://snapshots.slint.dev/master/editor/?lib=material=https://raw.githubusercontent.com/slint-ui/slint/refs/heads/master/ui-libraries/material/material.slint

Then paste the following example


import { ModalNavigationDrawer } from "@material";
export component Example inherits Window {
    width: 400px;
    height: 300px;
    // background: transparent;
    init => {
        debug("hi");
        mdf.show();
    }
    mdf := ModalNavigationDrawer {
        width: 280px;
        height: parent.height;
        groups: [
            {
                title: "Main",
                items: [
                    { icon: @image-url("../icons/share.svg"), text: "Home" },
                    { icon: @image-url("../icons/search.svg"), text: "Search" }
                ]
            }
        ];
    }
}

Environment Details

• Slint Version:
• Platform/OS:
• Programming Language:
• Backend/Renderer:

Product Impact

No response