[cs] Added test. Closes #3212

tests/unit/src/unit/issues/Issue3212.hx

@@ -0,0 +1,25 @@
+package unit.issues;
+
+class Issue3212 extends Test
+{
+	public function test()
+	{
+		var b = new B();
+		eq(b.f2(), null);
+	}
+}
+
+private class A<T> {
+	function f():T return null;
+}
+
+private class B extends A<String> {
+	public function new()
+	{
+	}
+
+	public function f2() {
+		var v = f();
+		return v;
+	}
+}