In mcs:

	Fix #75862.
	* expression.cs (Unary.ResolveOperator): Don't discard implicit
	converted value in Operator.OnesComplement.

In tests:
	* test-439.cs: New test from #75862.

svn path=/trunk/mcs/; revision=48725

1 files changed, 23 insertions, 0 deletions

diff --git a/mcs/tests/test-439.cs b/mcs/tests/test-439.cs
new file mode 100644
index 00000000000..85c349c9eff
--- /dev/null
+++ b/mcs/tests/test-439.cs
@@ -0,0 +1,23 @@
+using System;
+public struct LayerMask
+{
+	private ushort mask;
+	public static implicit operator int (LayerMask mask) { return (int)mask.mask; }
+	public static implicit operator LayerMask (int intVal) 
+	{ 
+		LayerMask mask;
+		mask.mask = unchecked ((ushort)intVal);
+		return mask;
+	}
+}
+
+class Test
+{
+	static private LayerMask test;
+	static public void Main ()
+	{
+		LayerMask a = ~test;
+		if (a != 0xFFFF) // LayerMask is an ushort internally
+			throw new Exception ("");
+	}
+}