diff --git a/testApps/ChatGPT_Benchmarks/EXN_nullptr/app_bug/app/src/main/java/com/example/nullptr/MainActivity.java b/testApps/ChatGPT_Benchmarks/EXN_nullptr/app_bug/app/src/main/java/com/example/nullptr/MainActivity.java
index dfe6adbd..4a2ab4ce 100644
--- a/testApps/ChatGPT_Benchmarks/EXN_nullptr/app_bug/app/src/main/java/com/example/nullptr/MainActivity.java
+++ b/testApps/ChatGPT_Benchmarks/EXN_nullptr/app_bug/app/src/main/java/com/example/nullptr/MainActivity.java
@@ -44,7 +44,7 @@ protected void onCreate(Bundle savedInstanceState) {
     public void launchSecondActivity() {
         Intent intent = new Intent(this, SecondActivity.class);
         Log.i("histInstrumentation"," " + System.identityHashCode(intent) + " = new Intent " + System.identityHashCode(this) + " " + System.identityHashCode(SecondActivity.class));
-        String key = "extra_data";
+        String key = new String("extra_data");
         String val = "Hello, SecondActivity!";
         intent.putExtra(key,val);
         Log.i("histInstrumentation","ci " + System.identityHashCode(intent) + " putExtra " + System.identityHashCode(key) + " " + System.identityHashCode(val));
@@ -52,4 +52,4 @@ public void launchSecondActivity() {
         Log.i("histInstrumentation","ci " + System.identityHashCode(this) + " startActivity " + System.identityHashCode(intent));
     }
 
-}
\ No newline at end of file
+}
diff --git a/testApps/ChatGPT_Benchmarks/EXN_nullptr/app_bug/app/src/main/java/com/example/nullptr/SecondActivity.java b/testApps/ChatGPT_Benchmarks/EXN_nullptr/app_bug/app/src/main/java/com/example/nullptr/SecondActivity.java
index 2a7fee5b..251cff36 100644
--- a/testApps/ChatGPT_Benchmarks/EXN_nullptr/app_bug/app/src/main/java/com/example/nullptr/SecondActivity.java
+++ b/testApps/ChatGPT_Benchmarks/EXN_nullptr/app_bug/app/src/main/java/com/example/nullptr/SecondActivity.java
@@ -16,7 +16,7 @@ protected void onCreate(Bundle savedInstanceState) {
         // Attempting to retrieve the extra data and display it
         Intent tmp1 = getIntent();
         Log.i("histInstrumentation",System.identityHashCode(tmp1) + " = ci " + System.identityHashCode(this) + " getIntent " );
-        String key = "extra_data";
+        String key = new String("extra_data");
         String data = tmp1.getStringExtra(key); // This key is incorrect
         Log.i("histInstrumentation",System.identityHashCode(data) + " = ci " + System.identityHashCode(tmp1) + " getStringExtra " + System.identityHashCode(key) );
         TextView textView = findViewById(R.id.textView);