I've encountered an interesting issue while working on a SwiftUI project, specifically when using @Environment(\.dismiss) along with a callback function like onSuccess: (Bool) -> Void in a ListDetail view. The app starts freezing, and CPU utilization spikes to 99%.

The repository now contains two branches:

• issue/swiftui-freezing: This branch keeps the original code that reproduces the issue as encountered.
• main: This branch contains the fixed code, which resolves the freezing problem.

• Scenario:

  • Using @Environment(\.dismiss) in the ListDetail view.
  • Including a callback function, onSuccess: (Bool) -> Void, to handle success scenarios for ListDetail.

• Symptoms:

  • The app freezes when these two components are used together.
  • CPU utilization spikes to 99%, causing performance degradation.

• Workaround:

  • If I comment out @Environment(\.dismiss), in the ListDetail view. or
  • Remove the onSuccess callback from ListDetail View, the app works perfectly fine without freezing.

1. Open the project.

2. Check these two files that are causing the issue:

   • ListDetail.swift
   • ListView.swift

   In both files, the combination of @Environment(\.dismiss) and the onSuccess callback is causing the freeze.

This issue raises the question of whether there is a potential conflict when using @Environment(\.dismiss) alongside a callback in SwiftUI.

• Xcode: 15.2
• iOS: 17.2
• macOS: 14.6.1