I’ve hit a strange SwiftUI preview crash that happens on macOS previews when using a view inside a List’s ForEach, resulting in the error Fatal Error in TableViewListCore_Mac2.swift.
- Only crashes macOS preview - iPhone/iPad preview doesn't crash.
- Doesn't crash when actually running the app.
Here’s a minimal reproducible example, causing the preview to crash.
XCode: Version 26.0.1 (17A400)
MacOS: 26.0.1 (25A362)
import SwiftUI
struct Item: Identifiable {
    let id = UUID()
    let name: String
}
struct ItemRow: View {
    let item: Item
    var body: some View {
        HStack {
            Button(action: {}) { Image(systemName: "play") }
            Text(item.name)
            Spacer()
            ProgressView()
        }
    }
}
struct ContentView: View {
    @State private var items = [
        Item(name: "Item A"),
        Item(name: "Item B"),
    ]
    var body: some View {
        List {
            ForEach(items) { item in
                ItemRow(item: item)
            }
        }
    }
}
#Preview("Content view") {
    ContentView()
}
#Preview("Item row") {
    ItemRow(item: Item(name: "Item A"))
}
If I wrap the row in a container, like this:
ForEach(items) { item in
    ZStack {
        ItemRow(item: item)
    }
}
the crash seems to disappear.
- Has anyone else seen this behavior?
- What might I be doing wrong?
- Any ideas about what could be causing this?
