Get full expanded interface list when checking for new slot interface implementation. Fixed #5110

1 files changed, 51 insertions, 0 deletions

diff --git a/mcs/tests/test-845.cs b/mcs/tests/test-845.cs
new file mode 100644
index 00000000000..cab90047bc9
--- /dev/null
+++ b/mcs/tests/test-845.cs
@@ -0,0 +1,51 @@
+interface IA
+{
+}
+
+interface IB
+{
+	int Foo ();
+	int Foo2 ();
+}
+
+interface IC : IA, IB
+{
+}
+
+class C1 : IA, IB
+{
+	public int Foo ()
+	{
+		return 5;
+	}
+	
+	public int Foo2 ()
+	{
+		return 55;
+	}
+}
+
+class C2 : C1, IC
+{
+	public new int Foo ()
+	{
+		return 2;
+	}
+	
+	public int Foo2 ()
+	{
+		return 2;
+	}
+
+	public static int Main ()
+	{
+		IC ic = new C2 ();
+		if (ic.Foo () != 2)
+			return 1;
+
+		if (ic.Foo2 () != 2)
+			return 2;
+		
+		return 0;
+	}
+}
\ No newline at end of file