Edit and Continue does not pick up null conditional operator on return

[miloush]

Version Used: 2.0.0.61413

Steps to Reproduce:

static void Main(string[] args)
{
    string[] tokens = ReturnNull().Split();
}

static string ReturnNull() => null;

1. Start debugging.
2. Hit F11 3 times so that you end up in the Main method after ReturnNull has evaluated.
3. Change the line to ReturnNull()?.Split();
4. Hit F10

Expected Behavior: the null conditional operator to be applied and the execution continues without exception with tokens being null

Actual Behavior: NullReferenceException

[tmat]

This should rather report a rude edit that a partially evaluated statement can't be updated.

[miloush]

Well, that would kind of make the experience worse, because currently you can set next statement before it and run it again after the edit...