1 files changed, 62 insertions, 0 deletions
diff --git a/test/863-serialization/src/Main.java b/test/863-serialization/src/Main.java
new file mode 100644
index 0000000000..72cc01f896
--- /dev/null
+++ b/test/863-serialization/src/Main.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2025 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.io.ByteArrayInputStream;
+import java.io.InvalidClassException;
+import java.io.ObjectInputStream;
+
+public class Main {
+
+  public static void main(String[] args) throws Exception {
+    deserializeHexToConcurrentHashMap();
+  }
+
+  public static byte[] hexStringToByteArray(String hexString) {
+    if (hexString == null || hexString.isEmpty()) {
+      return new byte[0];
+    }
+    if (hexString.length() % 2 != 0) {
+      throw new IllegalArgumentException("Hex string must have an even number of characters.");
+    }
+    int len = hexString.length();
+    byte[] data = new byte[len / 2];
+    for (int i = 0; i < len; i += 2) {
+      int highNibble = Character.digit(hexString.charAt(i), 16);
+      int lowNibble = Character.digit(hexString.charAt(i + 1), 16);
+      if (highNibble == -1 || lowNibble == -1) {
+        throw new IllegalArgumentException(
+            "Invalid hex character in string: " + hexString.charAt(i) + hexString.charAt(i + 1));
+      }
+      data[i / 2] = (byte) ((highNibble << 4) + lowNibble);
+    }
+    return data;
+  }
+
+  public static void deserializeHexToConcurrentHashMap() throws Exception {
+    byte[] bytes = hexStringToByteArray("ACED0005737200266A6176612E7574696C2E636F6E63757272656E742E436F6E63757272656E74486173684D61706499DE129D87293D0300007870737200146A6176612E746578742E44617465466F726D6174642CA1E4C22615FC0200007870737200146A6176612E746578742E44617465466F726D6174642CA1E4C22615FC020000787070707878000000");
+    ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
+    ObjectInputStream ois = new ObjectInputStream(bis);
+    try {
+      Object deserializedObject = ois.readObject();
+      throw new Error("Expected InvalidClassException");
+    } catch (InvalidClassException e) {
+      // expected
+      if (!(e.getCause() instanceof InstantiationException)) {
+        throw new Error("Expected InstantiationException");
+      }
+    }
+  }
+}