Unity crashes when performing a drag/drop function

I followed this tutorial on how to implement drag/drop but when trying to perform the drag and drop unity crashes.

This is my script:

Code (CSharp):

1.     public void OnPointerDown(PointerEventData eventData)
2.     {
3.         Debug.Log("OnPointerDown");
4.     }
5.  
6.     public void OnBeginDrag(PointerEventData eventData)
7.     {
8.         Debug.Log("OnBeginDrag");
9.     }
10.  
11.     public void OnDrag(PointerEventData eventData)
12.     {
13.         rect.anchoredPosition += eventData.delta / canvas.scaleFactor;
14.     }
15.  
16.     public void OnEndDrag(PointerEventData eventData)
17.     {
18.         Debug.Log("OnEndDrag");
19.     }

I have no compiler errors what so ever.
BTW: this is my UI hirachy: Canvas/Inventory/Slots/Slot(This is the Object holding the file)

 

Nothing in that script looks like it could cause the editor to crash, so I expect your problem is somewhere else.

 

I thought so too but everything works except this. If I comment these lines out it doesn't crash also it only crashes if I try to use these features. Restarting Unity doesn't work either.

I dont understand why it doesn't work since I have used it before.

 

Conceivably, modifying anchoredPosition (line 13) could have some sort of interaction with some other code that causes a crash. If that were true, commenting out line 13 might avert the crash, even though it isn't primarily responsible.

Though I am a bit suspicious of your test. If you commented out exactly and only the lines that you showed in your OP, I wouldn't expect the code to compile anymore, since you would have removed the implementation of some interfaces that presumably you named at the top of the class.