Imported Upstream version 3.10.0

Former-commit-id: 172c8e3c300b39d5785c7a3e8dfb08ebdbc1a99b

mcs/errors/cs0165-48.cs

@@ -0,0 +1,24 @@
+// CS0165: Use of unassigned local variable `v'
+// Line: 19
+
+using System;
+
+class X
+{
+	int this [int v] {
+		get {
+			return 1;
+		}
+		set {			
+		}
+	}
+
+	public static void Main ()
+	{
+		int v;
+		X x = null;
+
+		var r = x?[v = 2];
+		Console.WriteLine (v);
+	}
+}