CodeQL fixes

Vincent Biret (baywet) · Aug 19, 2026 · Aug 18, 2026 · Aug 18, 2026 · Aug 18, 2026 · Aug 18, 2026
commit d09dff2fe34dea5d6782edda48d154647210f8ef
diff --git a/src/Microsoft.OpenApi.YamlReader/YamlJsonParser.cs b/src/Microsoft.OpenApi.YamlReader/YamlJsonParser.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Text.Json.Nodes;
@@ -180,7 +180,7 @@ private void AddNode(MaterializedNode materialized)
                 frame.NodeCount = checked(frame.NodeCount + materialized.NodeCount);
                 frame.MaxChildHeight = Math.Max(frame.MaxChildHeight, materialized.Height);
                 break;
-            case JsonObject map when frame.PendingKey is null:
+            case JsonObject when frame.PendingKey is null:
                 frame.PendingKey = materialized.MappingKey
                     ?? throw new OpenApiReaderException("YAML mapping keys must be scalar values.");
                 break;

diff --git a/src/Microsoft.OpenApi/Validations/Rules/OpenApiSchemaRules.cs b/src/Microsoft.OpenApi/Validations/Rules/OpenApiSchemaRules.cs
@@ -160,12 +160,9 @@ private static IEnumerable<IOpenApiSchema> GetSchemaCombinators(IOpenApiSchema s
 
         private static void EnqueueSchemas(Queue<IOpenApiSchema> schemasToVisit, IEnumerable<IOpenApiSchema> childSchemas)
         {
-            foreach (var childSchema in childSchemas)
+            foreach (var childSchema in childSchemas.Where(childSchema => childSchema is not null))
             {
-                if (childSchema is not null)
-                {
-                    schemasToVisit.Enqueue(childSchema);
-                }
+                schemasToVisit.Enqueue(childSchema);
             }
         }