output: #fixed code
                                  protected void callOnFinalState(final State<C> state, final C context) {
          try {
              if (onFinalStateHandler != null) {
                  if (isTrace())
                      log.debug("when final state {} for {} <<<", state, context);
  
                  onFinalStateHandler.call(state, context);
  
                  if (isTrace())
                      log.debug("when final state {} for {} >>>", state, context);
              }
  
              callOnTerminate(context);
          } catch (Exception e) {
              callOnError(new ExecutionError(state, null, e,
                  "Execution Error in [EasyFlow.whenFinalState] handler", context));
          }
      }
input: #vulnerable code 
                                  protected void callOnFinalState(final State<C> state, final C context) {
          try {
              if (onFinalStateHandler != null) {
                  if (isTrace())
                      log.debug("when final state {} for {} <<<", state, context);
  
                  onFinalStateHandler.call(state, context);
  
                  if (isTrace())
                      log.debug("when final state {} for {} >>>", state, context);
              }
  
              synchronized (context) {
                  callOnTerminate(context);
                  context.notifyAll();
              }
  
          } catch (Exception e) {
              callOnError(new ExecutionError(state, null, e,
                  "Execution Error in [EasyFlow.whenFinalState] handler", context));
          }
      } 
                              #location 7 
                              #vulnerability type THREAD_SAFETY_VIOLATION