Clone shared members list before operators merging. Fixes #10967

1 files changed, 30 insertions, 0 deletions

diff --git a/mcs/tests/test-866.cs b/mcs/tests/test-866.cs
new file mode 100644
index 00000000000..723795ee412
--- /dev/null
+++ b/mcs/tests/test-866.cs
@@ -0,0 +1,30 @@
+class C : B
+{
+	public static bool operator + (C a, short b)
+	{
+		return false;
+	}
+
+	public static bool operator + (C a, long b)
+	{
+		return false;
+	}
+}
+
+class B
+{
+	public static bool operator + (B b, string s)
+	{
+		return false;
+	}
+}
+
+public class Test
+{
+	public static void Main ()
+	{
+		var c = new C ();
+		var a1 = c + "a";
+		var a2 = c + "a";
+	}
+}
\ No newline at end of file