Program: 53622
Project: 53622
Buggy source:
@Override public void addSetter(String setterTypeName,String fieldName,boolean removeFinalFlag) throws InstrumentException {
  try {
    Class<?> setterType=pluginContext.injectClass(classLoader,setterTypeName);
    SetterDetails setterDetails=new SetterAnalyzer().analyze(setterType);
    CtField field=ctClass.getField(fieldName);
    if (!field.getType().getName().equals(setterDetails.getFieldType().getName())) {
      throw new IllegalArgumentException("String_Node_Str" + setterDetails.getSetter() + "String_Node_Str"+ field.getType().getName());
    }
    final int originalModifiers=field.getModifiers();
    if (Modifier.isStatic(originalModifiers)) {
      throw new IllegalArgumentException("String_Node_Str" + setterDetails.getSetter().getName() + "String_Node_Str"+ fieldName);
    }
    boolean finalRemoved=false;
    if (Modifier.isFinal(originalModifiers)) {
      if (!removeFinalFlag) {
        throw new IllegalArgumentException("String_Node_Str" + setterDetails.getSetter().getName() + "String_Node_Str"+ fieldName);
      }
 else {
        final int modifiersWithFinalRemoved=Modifier.clear(originalModifiers,Modifier.FINAL);
        field.setModifiers(modifiersWithFinalRemoved);
        finalRemoved=true;
      }
    }
    try {
      CtMethod setterMethod=CtNewMethod.setter(setterDetails.getSetter().getName(),field);
      if (setterMethod.getDeclaringClass() != ctClass) {
        setterMethod=CtNewMethod.copy(setterMethod,ctClass,null);
      }
      ctClass.addMethod(setterMethod);
      CtClass ctInterface=ctClass.getClassPool().get(setterTypeName);
      ctClass.addInterface(ctInterface);
    }
 catch (    Exception e) {
      if (finalRemoved) {
        field.setModifiers(originalModifiers);
      }
      throw e;
    }
  }
 catch (  Exception e) {
    throw new InstrumentException("String_Node_Str" + setterTypeName,e);
  }
}

Fixed version (ground truth):
@Override public void addSetter(String setterTypeName,String fieldName,boolean removeFinalFlag) throws InstrumentException {
  try {
    Class<?> setterType=pluginContext.injectClass(classLoader,setterTypeName);
    SetterDetails setterDetails=new SetterAnalyzer().analyze(setterType);
    CtField field=ctClass.getField(fieldName);
    String fieldTypeName=JavaAssistUtils.javaClassNameToObjectName(setterDetails.getFieldType().getName());
    if (!field.getType().getName().equals(fieldTypeName)) {
      throw new IllegalArgumentException("String_Node_Str" + setterDetails.getSetter() + "String_Node_Str"+ field.getType().getName());
    }
    final int originalModifiers=field.getModifiers();
    if (Modifier.isStatic(originalModifiers)) {
      throw new IllegalArgumentException("String_Node_Str" + setterDetails.getSetter().getName() + "String_Node_Str"+ fieldName);
    }
    boolean finalRemoved=false;
    if (Modifier.isFinal(originalModifiers)) {
      if (!removeFinalFlag) {
        throw new IllegalArgumentException("String_Node_Str" + setterDetails.getSetter().getName() + "String_Node_Str"+ fieldName);
      }
 else {
        final int modifiersWithFinalRemoved=Modifier.clear(originalModifiers,Modifier.FINAL);
        field.setModifiers(modifiersWithFinalRemoved);
        finalRemoved=true;
      }
    }
    try {
      CtMethod setterMethod=CtNewMethod.setter(setterDetails.getSetter().getName(),field);
      if (setterMethod.getDeclaringClass() != ctClass) {
        setterMethod=CtNewMethod.copy(setterMethod,ctClass,null);
      }
      ctClass.addMethod(setterMethod);
      CtClass ctInterface=ctClass.getClassPool().get(setterTypeName);
      ctClass.addInterface(ctInterface);
    }
 catch (    Exception e) {
      if (finalRemoved) {
        field.setModifiers(originalModifiers);
      }
      throw e;
    }
  }
 catch (  Exception e) {
    throw new InstrumentException("String_Node_Str" + setterTypeName,e);
  }
}