chart_5.diff

diff --git a/source/org/jfree/data/xy/XYSeries.java b/source/org/jfree/data/xy/XYSeries.java
index 0b37e6e..f471bb8 100644
--- a/source/org/jfree/data/xy/XYSeries.java
+++ b/source/org/jfree/data/xy/XYSeries.java
@@ -538,6 +538,18 @@ public class XYSeries extends Series implements Cloneable, Serializable {
      *         item was overwritten.
      */
     public XYDataItem addOrUpdate(Number x, Number y) {
+        if (Boolean.parseBoolean(System.getProperty("defects4j.instrumentation.enabled"))) { // defects4j.instrumentation
+            try { // defects4j.instrumentation
+                return addOrUpdate_orig(x, y); // defects4j.instrumentation
+            } catch (IndexOutOfBoundsException e) { // defects4j.instrumentation
+                throw new RuntimeException("[Defects4J_BugReport_Violation]"); // defects4j.instrumentation
+            } // defects4j.instrumentation
+        } else { // defects4j.instrumentation
+            return addOrUpdate_orig(x, y); // defects4j.instrumentation
+        } // defects4j.instrumentation
+    }
+
+    public XYDataItem addOrUpdate_orig(Number x, Number y) { // defects4j.instrumentation
         if (x == null) {
             throw new IllegalArgumentException("Null 'x' argument.");
         }