output: #fixed code
                               @Override
  	protected void init() {
  		super.init();
  		currentAddress = stringsStartAddress;
  		full = false;
  		currentSegmentIndex = INDEX_NOT_YET_USED;
  		currentSegmentBlockIndex = INDEX_NOT_YET_USED;
  		directMemoryService.setMemory(inUseBlockAddress, inUseBlockCount, (byte)0);
  	}
input: #vulnerable code 
                               @Override
  	protected void init() {
  		super.init();
  		currentAddress = stringsStartAddress;
  		full = false;
  		currentIndex = INDEX_NOT_YET_USED;
  		currentBlockIndex = INDEX_NOT_YET_USED;
  		directMemoryService.setMemory(inUseBlockAddress, inUseBlockCount, (byte)0);
  	} 
                              #location 6 
                              #vulnerability type THREAD_SAFETY_VIOLATION