vecty panic with list child

vecty-panic-list-child.go

package main

import (
	"github.com/gopherjs/vecty"
	"github.com/gopherjs/vecty/elem"
	"github.com/gopherjs/vecty/event"
	"github.com/gopherjs/vecty/prop"
)

type PageView struct {
	vecty.Core
	bHTMLLabel *Button
	bListLabel *Button
}

type Button struct {
	vecty.Core
	Label    vecty.ComponentOrHTML
	Disabled bool
}

func main() {
	bHTMLLabel := &Button{
		Label: vecty.Text("HTML Label"),
	}
	bListLabel := &Button{
		Label: vecty.List{
			vecty.Text("List "),
			elem.Code(vecty.Text("Label")),
		},
	}
	vecty.RenderBody(&PageView{
		bHTMLLabel: bHTMLLabel,
		bListLabel: bListLabel,
	})
}

func (c *PageView) Render() vecty.ComponentOrHTML {
	return elem.Body(
		elem.Div(
			elem.Input(
				vecty.Markup(
					prop.Type(prop.TypeCheckbox),
					event.Change(func(e *vecty.Event) {
						checked := e.Target.Get("checked").Bool()
						c.bHTMLLabel.Disabled = checked
						vecty.Rerender(c.bHTMLLabel)
						c.bListLabel.Disabled = checked
						vecty.Rerender(c.bListLabel)
					}),
				),
			),
			vecty.Text("Disable all buttons"),
		),
		c.bHTMLLabel,
		c.bListLabel,
	)
}

func (c *Button) Render() vecty.ComponentOrHTML {
	return elem.Button(
		vecty.Markup(
			prop.Type(prop.TypeButton),
			vecty.Property("disabled", c.Disabled),
			event.Change(func(e *vecty.Event) {
				c.Disabled = true
				vecty.Rerender(c)
			}),
		),
		c.Label,
	)
}