How do you fix infinite loops

These are the different game states

void Update ()
{
	switch (_currentState) {
	case GameState.start:
		Debug.Log("Start");
		_currentState = GameState.inGame;
		break;
	case GameState.inGame:
		//Debug.Log("In Game");
		_scoreText.text = "Score: " + _score;
		break;
	case GameState.gameOver:
		Debug.Log("Game Over");			_scoreText.enabled = false;
		_gameOverText.enabled = true;
		break;		}
	}
}

This loops seems to be causing unity to crash

while (GameManager.gameManager.CurrentState == GameManager.GameState.inGame) 
{
	Debug.Log("Enter Lop");
	transform.position = Vector3.Lerp(targetPoint1.position, targetpoint2.position, time);
	if (Input.GetKey(KeyCode.Space))
	{
		GameManager.gameManager.CurrentState = GameManager.GameState.gameOver;
	}
}

I have aa means of breaking out of the loop so I'm not sure why unity is crashing

I've tried using an iEnumerator but the sprite doesn't seem to move bettween the two points.

using UnityEngine;
using System.Collections;

public class EnemyStepController : MonoBehaviour 
{
	//Points to travel to and from
	public Transform[] targetPoints;

	public int time = 5;

	public IEnumerator StepMovement ()
	{
		for (int cnt = 0; cnt < targetPoints.Length; cnt++) 
		{
			transform.position = Vector3.Lerp (transform.position, 
			                                   targetPoints[cnt].position, 
			                                   time * Time.deltaTime);
		}

		if (Input.GetKey(KeyCode.Space))
		{
			GameManager.gameManager.CurrentState = GameManager.GameState.gameOver;
			yield break;
		}
	}

	void OnTriggerEnter2D (Collider2D col)
	{
		if (col.tag == "Player")
		{
			GameManager.gameManager.CurrentState = GameManager.GameState.gameOver;
		}
	}
}

Also, whenever I change the time variable in the inspector i get 3 of these errors

Unsupported type vector