Null checks

src/PixiEditor/Models/DocumentModels/UpdateableChangeExecutors/TransformSelectedExecutor.cs

@@ -200,7 +200,8 @@ internal class TransformSelectedExecutor : UpdateableChangeExecutor, ITransforma
             }
             else
             {
-                if (document.SoftSelectedStructureMembers.Contains(topMost) || document.SelectedStructureMember?.Id == topMost.Id)
+                if (document.SoftSelectedStructureMembers.Contains(topMost) ||
+                    document.SelectedStructureMember?.Id == topMost.Id)
                 {
                     Deselect(smallestSizeDifferenceList);
                 }
@@ -253,15 +254,20 @@ internal class TransformSelectedExecutor : UpdateableChangeExecutor, ITransforma
             bool deselectingWasMain = document.SelectedStructureMember?.Id == topMost.Id;
             if (deselectingWasMain)
             {
-                Guid? nextMain = document.SoftSelectedStructureMembers.FirstOrDefault()?.Id;
-                List<Guid> softSelected = document.SoftSelectedStructureMembers
+                Guid? nextMain = document.SoftSelectedStructureMembers?.FirstOrDefault()?.Id;
+                List<Guid> softSelected = document.SoftSelectedStructureMembers?
                     .Select(x => x.Id).Where(x => x != nextMain.Value).ToList();
 
                 document.Operations.ClearSoftSelectedMembers();
-                document.Operations.SetSelectedMember(nextMain.Value);
+                if (nextMain.HasValue)
+                {
+                    document.Operations.SetSelectedMember(nextMain.Value);
+                }
 
                 foreach (var guid in softSelected)
                 {
+                    if (guid == Guid.Empty) continue;
+
                     document.Operations.AddSoftSelectedMember(guid);
                 }
             }