Imported Upstream version 4.2.0.179

Former-commit-id: 4610231f55806d2a05ed69e5ff3faa7336cc1479

mcs/tests/test-919.cs

@@ -0,0 +1,26 @@
+// Compiler options: -unsafe
+
+class Test
+{
+	public static void Main (string[] args)
+	{
+		string s = "hello, world!";
+		Outer (s);
+	}
+
+	static void Outer (string s)
+	{
+		unsafe {
+			fixed (char* sp = s) {
+				char* p = sp;
+				Inner (ref p, sp);
+			}
+		}
+	}
+
+	static unsafe void Inner (ref char* p, char* sp)
+	{
+		++sp;
+		p = sp;
+	}
+}