SwiftUI preview does not update when changing an Int range supplied to a ForEach

Number:rdar://FB10035120 Date Originated:2/6/2022
Status:Open Resolved:No
Product:Xcode Product Version:Version 13.4 (13F17a)
Classification:Bug Reproducible:Always
Please describe the issue:
I noticed that in Xcode, the SwiftUI preview canvas does not update when I change an Int range supplied to a ForEach. 

Please list the steps you took to reproduce the issue:
I previewed the code below in the SwiftUI canvas, then I changed the ForEach from 1..<12 to 1..<13

import SwiftUI

struct StackTestView: View {
    var body: some View {
            alignment: .leading,
            spacing: 10
        ) {
            ) {
                Text("Item \($0)")

struct StackTestView_Previews: PreviewProvider {
    static var previews: some View {

What did you expect to happen?
 I've attached a screenshot in this state. I expected the preview to update, i.e. a 12th row should appear. The resume button when the preview can't be dynamically updated didn't appear either.

What actually happened?




By indiekiduk at June 2, 2022, 12:27 p.m. (reply...)

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