Imported Upstream version 3.10.0

Former-commit-id: 172c8e3c300b39d5785c7a3e8dfb08ebdbc1a99b

mcs/errors/cs8074.cs

@@ -0,0 +1,16 @@
+// CS8074: Expression tree cannot contain a dictionary initializer
+// Line: 13
+
+using System;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+
+class C
+{
+	public static void Main ()
+	{
+		Expression<Func<Dictionary<string, int>>> l = () => new Dictionary<string, int> {
+			["a"] = 1
+		};
+	}
+}