fix: null reference check

Signed-off-by: Vincent Biret <[email protected]>
microsoft · Jan 31, 2025 · a5023d6 · a5023d6
1 parent ac05342
commit a5023d6
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/Microsoft.OpenApi/Models/OpenApiSchema.cs b/src/Microsoft.OpenApi/Models/OpenApiSchema.cs
@@ -633,6 +633,7 @@ private void SerializeTypeProperty(JsonSchemaType? type, IOpenApiWriter writer,
         {
             // check whether nullable is true for upcasting purposes
             var isNullable = Nullable || 
+                                Extensions is not null &&
                                 Extensions.TryGetValue(OpenApiConstants.NullableExtension, out var nullExtRawValue) && 
                                 nullExtRawValue is OpenApiAny openApiAny &&
                                 openApiAny.Node is JsonNode jsonNode &&