Add not-failing test that tries to reproduce #473: has the data but call sequence not same as OSS-Fuzzer (#474)

Author: cowtowncoder

ion/src/test/java/com/fasterxml/jackson/dataformat/ion/failing/IonFuzz_473_66131_AIOOBE_Test.java

@@ -0,0 +1,33 @@
+package com.fasterxml.jackson.dataformat.ion.failing;
+
+import org.hamcrest.Matchers;
+import org.junit.Test;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonToken;
+import com.fasterxml.jackson.core.exc.StreamReadException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.dataformat.ion.*;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+//[dataformats-binary#473]: ArrayIndexOutOfBoundsException
+//https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=66131
+public class IonFuzz_473_66131_AIOOBE_Test
+{
+    private final ObjectMapper ION_MAPPER = new IonObjectMapper();
+
+    @Test
+    public void testFuzz66077_ArrayIndexOOBE() throws Exception {
+        final byte[] doc = { (byte) 0xe0, 0x01, 0x00, (byte) 0xea, (byte) 0xdc, (byte) 0x9a };
+        try (JsonParser p = ION_MAPPER.createParser(doc)) {
+            assertEquals(JsonToken.START_OBJECT, p.nextToken());
+            p.nextTextValue();
+            fail("Should not pass (invalid content)");
+        } catch (StreamReadException e) {
+            assertThat(e.getMessage(), Matchers.containsString("Corrupt content to decode"));
+        }
+    }
+}