Fix #3528

Author: cowtowncoder

release-notes/VERSION-2.x

@@ -36,6 +36,8 @@ Project: jackson-databind
   `@JsonInclude(value = JsonInclude.Include.CUSTOM, valueFilter = SomeFieldFilter.class)`
  (contributed by AmiDavidW@github)
 #3497: Deserialization of Throwables with PropertyNamingStrategy does not work
+#3528: `TokenBuffer` defaults for parser/stream-read features neither passed
+  from parser nor use real defaults
 
 2.13.4 (not yet released)
 

src/main/java/com/fasterxml/jackson/databind/util/TokenBuffer.java

@@ -1498,7 +1498,10 @@ public Parser(Segment firstSeg, ObjectCodec codec,
                 boolean hasNativeTypeIds, boolean hasNativeObjectIds,
                 JsonStreamContext parentContext)
         {
-            super(0);
+            // 25-Jun-2022, tatu: Ideally would pass parser flags along (as
+            //    per [databund#3528]) but for now make sure not to clear the flags
+            //    but let defaults be used
+            super();
             _segment = firstSeg;
             _segmentPtr = -1; // not yet read
             _codec = codec;

src/test/java/com/fasterxml/jackson/databind/util/TokenBufferTest.java

@@ -52,6 +52,17 @@ public void testBasicConfig() throws IOException
         assertTrue(buf.isClosed());
     }
 
+    // for [databind#3528]
+    public void testParserFeatureDefaults() throws IOException
+    {
+        TokenBuffer buf = new TokenBuffer(MAPPER, false);
+        try (JsonParser p = buf.asParser()) {
+            for (JsonParser.Feature feat : JsonParser.Feature.values()) {
+                assertEquals("Feature "+feat, feat.enabledByDefault(), p.isEnabled(feat));
+            }
+        }
+    }
+
     /**
      * Test writing of individual simple values
      */