Address PR feedback

dotnet · Aug 15, 2023 · 70c9f16 · 70c9f16
1 parent 275be61
commit 70c9f16
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Showing 2 changed files with 4 additions and 0 deletions.
diff --git a/src/libraries/System.Collections.Immutable/src/System/Collections/Frozen/FrozenDictionary.cs b/src/libraries/System.Collections.Immutable/src/System/Collections/Frozen/FrozenDictionary.cs
@@ -113,6 +113,8 @@ public static FrozenDictionary<TKey, TElement> ToFrozenDictionary<TSource, TKey,
         private static FrozenDictionary<TKey, TValue> CreateFromDictionary<TKey, TValue>(Dictionary<TKey, TValue> source)
             where TKey : notnull
         {
+            Debug.Assert(source.Count > 0, "Empty sources should have been filtered out by caller");
+
             IEqualityComparer<TKey> comparer = source.Comparer;
 
             // Optimize for value types when the default comparer is being used. In such a case, the implementation

diff --git a/src/libraries/System.Collections.Immutable/src/System/Collections/Frozen/FrozenSet.cs b/src/libraries/System.Collections.Immutable/src/System/Collections/Frozen/FrozenSet.cs
@@ -59,6 +59,8 @@ public static FrozenSet<T> ToFrozenSet<T>(this IEnumerable<T> source, IEqualityC
 
         private static FrozenSet<T> CreateFromSet<T>(HashSet<T> source)
         {
+            Debug.Assert(source.Count > 0, "Empty sources should have been filtered out by caller");
+
             IEqualityComparer<T> comparer = source.Comparer;
 
             // Optimize for value types when the default comparer is being used. In such a case, the implementation