Program: 12010
Project: 12010
Buggy source:
public String toCompilableType(String typeName,List<String> generics,List<String> importedList,String callerClassPackageName){
  if (typeName == null) {
    return typeName;
  }
  typeName=typeName.replaceAll("String_Node_Str","String_Node_Str");
  if (typeName.matches("String_Node_Str")) {
    return typeName;
  }
  boolean isArray=false;
  String arrayPart="String_Node_Str";
  if (typeName.matches("String_Node_Str")) {
    isArray=true;
    Matcher mat=Pattern.compile("String_Node_Str").matcher(typeName);
    while (mat.find()) {
      arrayPart+="String_Node_Str";
    }
    typeName=typeName.replaceAll("String_Node_Str","String_Node_Str");
  }
  if (typeName.matches(RegExp.Anything_ZeroOrMore_Min + RegExp.Generics + RegExp.Anything_ZeroOrMore_Min)) {
    typeName=typeName.replaceAll(RegExp.Generics,StringValue.Empty);
  }
  boolean isTypeAvailable=false;
  String destTypeName="String_Node_Str";
  try {
    if (PrimitiveTypeUtil.isPrimitive(typeName)) {
      isTypeAvailable=true;
      if (!destTypeName.matches("String_Node_Str"))       destTypeName=PrimitiveTypeUtil.getTypeDefaultValue(typeName);
    }
 else {
      try {
        Class.forName("String_Node_Str" + typeName);
        isTypeAvailable=true;
      }
 catch (      Exception ignore) {
        List<File> files=new CommonsIOFileSearcher().searchFilesRecursivelyByName(config.directoryPathOfProductSourceCode + "String_Node_Str" + callerClassPackageName.replaceAll("String_Node_Str","String_Node_Str"),typeName + RegExp.FileExtension.JavaFile);
        if (files != null && files.size() > 0) {
          isTypeAvailable=true;
        }
      }
      if (!isTypeAvailable) {
        Class.forName(typeName);
      }
    }
  }
 catch (  Exception e) {
    for (    String importedPackage : importedList) {
      importedPackage=importedPackage.replaceAll("String_Node_Str",StringValue.Empty);
      try {
        String regexp="String_Node_Str" + typeName.replaceAll("String_Node_Str","String_Node_Str").replaceAll("String_Node_Str","String_Node_Str") + "String_Node_Str";
        if (importedPackage.matches(regexp)) {
          isTypeAvailable=true;
          break;
        }
      }
 catch (      Exception e2) {
        e2.printStackTrace();
      }
    }
  }
  if (generics != null) {
    StringBuilder buf=new StringBuilder();
    if (generics.size() > 0) {
      buf.append("String_Node_Str");
      buf.append(generics.get(0));
      if (generics.size() > 1) {
        for (int i=1; i < generics.size(); i++) {
          buf.append("String_Node_Str");
          buf.append(generics.get(i));
        }
      }
      buf.append("String_Node_Str");
    }
    typeName+=buf.toString();
  }
  if (typeName == null || typeName.equals(StringValue.Empty)) {
    typeName="String_Node_Str";
  }
  if (destTypeName == null || destTypeName.equals(StringValue.Empty)) {
    destTypeName="String_Node_Str";
  }
  if (arrayPart == null || arrayPart.length() == 0) {
    arrayPart="String_Node_Str";
  }
  if (isTypeAvailable) {
    return isArray ? typeName + arrayPart : typeName;
  }
 else {
    return isArray ? destTypeName + arrayPart : destTypeName;
  }
}

Fixed version (ground truth):
public String toCompilableType(String typeName,List<String> generics,List<String> importedList,String callerClassPackageName){
  if (typeName == null) {
    return typeName;
  }
  typeName=typeName.replaceAll("String_Node_Str","String_Node_Str");
  if (typeName.matches("String_Node_Str")) {
    return typeName;
  }
  boolean isArray=false;
  String arrayPart="String_Node_Str";
  if (typeName.matches("String_Node_Str")) {
    isArray=true;
    Matcher mat=Pattern.compile("String_Node_Str").matcher(typeName);
    while (mat.find()) {
      arrayPart+="String_Node_Str";
    }
    typeName=typeName.replaceAll("String_Node_Str","String_Node_Str");
  }
  if (typeName.matches(RegExp.Anything_ZeroOrMore_Min + RegExp.Generics + RegExp.Anything_ZeroOrMore_Min)) {
    typeName=typeName.replaceAll(RegExp.Generics,StringValue.Empty);
  }
  boolean isTypeAvailable=false;
  String destTypeName="String_Node_Str";
  try {
    if (PrimitiveTypeUtil.isPrimitive(typeName)) {
      isTypeAvailable=true;
      if (!destTypeName.matches("String_Node_Str"))       destTypeName=PrimitiveTypeUtil.getTypeDefaultValue(typeName);
    }
 else {
      try {
        Class.forName("String_Node_Str" + typeName);
        isTypeAvailable=true;
      }
 catch (      Exception ignore) {
        List<File> files=new CommonsIOFileSearcher().searchFilesRecursivelyByName(config.directoryPathOfProductSourceCode + "String_Node_Str" + callerClassPackageName.replaceAll("String_Node_Str","String_Node_Str"),typeName + RegExp.FileExtension.JavaFile);
        if (files != null && files.size() > 0) {
          isTypeAvailable=true;
        }
      }
      if (!isTypeAvailable) {
        Class.forName(typeName);
      }
    }
  }
 catch (  Exception e) {
    for (    String importedPackage : importedList) {
      importedPackage=importedPackage.replaceAll("String_Node_Str",StringValue.Empty).trim();
      try {
        String regexp="String_Node_Str" + typeName.replaceAll("String_Node_Str","String_Node_Str").replaceAll("String_Node_Str","String_Node_Str") + "String_Node_Str";
        if (importedPackage.matches(regexp)) {
          isTypeAvailable=true;
          break;
        }
        if (!importedPackage.contains("String_Node_Str") && importedPackage.endsWith("String_Node_Str")) {
          try {
            Class.forName(importedPackage.replace("String_Node_Str","String_Node_Str") + typeName);
            isTypeAvailable=true;
          }
 catch (          Exception ignore) {
          }
        }
      }
 catch (      Exception e2) {
        e2.printStackTrace();
      }
    }
  }
  if (generics != null) {
    StringBuilder buf=new StringBuilder();
    if (generics.size() > 0) {
      buf.append("String_Node_Str");
      buf.append(generics.get(0));
      if (generics.size() > 1) {
        for (int i=1; i < generics.size(); i++) {
          buf.append("String_Node_Str");
          buf.append(generics.get(i));
        }
      }
      buf.append("String_Node_Str");
    }
    typeName+=buf.toString();
  }
  if (typeName == null || typeName.equals(StringValue.Empty)) {
    typeName="String_Node_Str";
  }
  if (destTypeName == null || destTypeName.equals(StringValue.Empty)) {
    destTypeName="String_Node_Str";
  }
  if (arrayPart == null || arrayPart.length() == 0) {
    arrayPart="String_Node_Str";
  }
  if (isTypeAvailable) {
    return isArray ? typeName + arrayPart : typeName;
  }
 else {
    return isArray ? destTypeName + arrayPart : destTypeName;
  }
}