Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-593.cs

@@ -0,0 +1,25 @@
+using System;
+
+public delegate Tuple<D1, DR1> Parser<D1, DR1> (D1 stream);
+
+static class Combinator
+{
+	public static Parser<L1, LR1> Lazy<L1, LR1> (Func<Parser<L1, LR1>> func)
+	{
+		return null;
+	}
+
+	public static Parser<C1, CR1> Choice<C1, CR1> (Parser<C1, CR1> parsers)
+	{
+		Parser<C1, CR1> tail = null;
+
+		Lazy (() => Choice (tail));
+
+		return null;
+	}
+
+	public static void Main ()
+	{
+		Choice ((int l) => Tuple.Create (1, 2));
+	}
+}