Merge pull request swiftlang#39741 from xedin/rdar-80630127-test

[TypeChecker] NFC: Add a test-case for rdar://80630127

Author: xedin

validation-test/Sema/SwiftUI/rdar80630127.swift

@@ -0,0 +1,42 @@
+// RUN: %target-typecheck-verify-swift -target %target-cpu-apple-macosx10.15 -swift-version 5 -disable-availability-checking
+// REQUIRES: objc_interop
+// REQUIRES: OS=macosx
+
+import SwiftUI
+
+struct FullScreenView<Content>: View where Content: View {
+  @State private var showFullScreen: Bool = false
+
+  var x: Double = 0
+  var y: Double = 0
+
+  var content: () -> Content
+
+  // Body of this view used to cause rapid memory use.
+  var body: some View {
+    ZStack {
+      VStack {
+        HStack {
+          Button {
+          } label: {
+            Text("a")
+          }
+          .offset(x: x, y: y)
+        }
+      }
+    }
+    .fullScreenCover(isPresented: $showFullScreen) {    
+      ZStack {
+        VStack {
+          HStack {
+            Button {
+	      
+            } label: {
+              Text("a")
+            }
+          }
+        }
+      }
+    }
+  }
+}