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?
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