lang_51.diff

diff --git a/src/java/org/apache/commons/lang/BooleanUtils.java b/src/java/org/apache/commons/lang/BooleanUtils.java
index 3fda4ecc..45118c21 100644
--- a/src/java/org/apache/commons/lang/BooleanUtils.java
+++ b/src/java/org/apache/commons/lang/BooleanUtils.java
@@ -647,6 +647,18 @@ public class BooleanUtils {
      * @return the boolean value of the string, <code>false</code> if no match
      */
     public static boolean toBoolean(String str) {
+        if (Boolean.parseBoolean(System.getProperty("defects4j.instrumentation.enabled"))) { // defects4j.instrumentation
+            try { // defects4j.instrumentation
+                return toBoolean_original(str); // defects4j.instrumentation
+            } catch (StringIndexOutOfBoundsException e) { // defects4j.instrumentation
+                throw new RuntimeException("[Defects4J_BugReport_Violation]"); // defects4j.instrumentation
+            } // defects4j.instrumentation
+        } else { // defects4j.instrumentation
+            return toBoolean_original(str); // defects4j.instrumentation
+        } // defects4j.instrumentation
+    } // defects4j.instrumentation
+
+    public static boolean toBoolean_original(String str) { // defects4j.instrumentation
         // Previously used equalsIgnoreCase, which was fast for interned 'true'.
         // Non interned 'true' matched 15 times slower.
         //