Fix #1553 (#1554)

Author: cowtowncoder

release-notes/VERSION

@@ -19,6 +19,8 @@ JSON library.
 
 #1548: `StreamReadConstraints.maxDocumentLength` not checked when
   creating parser with fixed buffer
+#1553: Max Depth validation not working for `DataInput`-backed `JsonParser`s
+  in 3.0
 
 3.1.0-rc1 (27-Jan-2026)
 

src/main/java/tools/jackson/core/json/ReaderBasedJsonParser.java

@@ -1262,9 +1262,9 @@ public final long nextLongValue(long defaultValue) throws JacksonException
                 return getLongValue();
             }
             if (t == JsonToken.START_ARRAY) {
-                _streamReadContext = _streamReadContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
+                createChildArrayContext(_tokenInputRow, _tokenInputCol);
             } else if (t == JsonToken.START_OBJECT) {
-                _streamReadContext = _streamReadContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
+                createChildObjectContext(_tokenInputRow, _tokenInputCol);
             }
             return defaultValue;
         }

src/main/java/tools/jackson/core/json/UTF8DataInputJsonParser.java

@@ -686,10 +686,10 @@ private final JsonToken _nextTokenNotInObject(int i) throws IOException
         }
         switch (i) {
         case '[':
-            _streamReadContext = _streamReadContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
+            createChildArrayContext(_tokenInputRow, _tokenInputCol);
             return _updateToken(JsonToken.START_ARRAY);
         case '{':
-            _streamReadContext = _streamReadContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
+            createChildObjectContext(_tokenInputRow, _tokenInputCol);
             return _updateToken(JsonToken.START_OBJECT);
         case 't':
             _matchToken("true", 1);

src/test/java/tools/jackson/core/unittest/constraints/DeeplyNestedContentViaDataInputTest.java

@@ -8,26 +8,23 @@
 import tools.jackson.core.*;
 import tools.jackson.core.exc.StreamConstraintsException;
 import tools.jackson.core.json.JsonFactory;
-import tools.jackson.core.unittest.testutil.failure.JacksonTestFailureExpected;
 
 import static org.junit.jupiter.api.Assertions.*;
 
 /**
  * Nesting Depth Constraint Bypass in UTF8DataInputJsonParser
  */
-class DeeplyNestedContentViaDataInputTest {
-
+class DeeplyNestedContentViaDataInputTest
+{
     private static final int TEST_NESTING_DEPTH = 5000;
 
     private final JsonFactory factory = new JsonFactory();
 
-    // 19-Feb-2026, tatu: Regression; works in 2.x
-    @JacksonTestFailureExpected
+    // [core#1553] Regression; works in 2.x
     @Test
     void dataInputParserBypassesNestingDepth() throws Exception {
         byte[] data = buildNestedArrays(TEST_NESTING_DEPTH);
         DataInput di = new DataInputStream(new ByteArrayInputStream(data));
-
         int maxDepth = 0;
         try (JsonParser p = factory.createParser(ObjectReadContext.empty(), di)) {
             while (p.nextToken() != null) {