[tests] add

closes #9563

tests/unit/src/unit/issues/Issue9563.hx

@@ -0,0 +1,17 @@
+package unit.issues;
+
+import unit.Test;
+import utest.Assert;
+
+enum abstract Noise(Null<Dynamic>) {
+	final Noise = null;
+}
+
+class Issue9563 extends Test {
+	function test() {
+		switch Noise { // Unmatched patterns: _
+			case Noise:
+		}
+		Assert.pass();
+	}
+}