Dynamic compound assignment breaks standard C# result conversion rules

1 files changed, 34 insertions, 0 deletions

diff --git a/mcs/tests/dtest-033.cs b/mcs/tests/dtest-033.cs
new file mode 100644
index 00000000000..8a0f13b93d3
--- /dev/null
+++ b/mcs/tests/dtest-033.cs
@@ -0,0 +1,34 @@
+using System;
+
+public class Test
+{
+	byte Prop {
+		get { return 4; }
+		set { }
+	}
+
+	byte this [int arg] {
+		get { return 2; }
+		set { }
+	}
+
+	public static int Main ()
+	{
+		dynamic v = 'a';
+		dynamic a = new Test ();
+
+		string s = "-sdfas";
+		
+		// dynamic compound assignment with different result type
+		v += s;
+
+		if (v != "a-sdfas")
+			return 1;
+
+		byte b = 4;
+		a.Prop *= b;
+		a[4] ^= b;
+
+		return 0;
+	}
+}
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