Fix for SOE in VarianceChecker #KT-13401 Fixed

compiler/testData/diagnostics/tests/kt13401.kt

@@ -0,0 +1,15 @@
+// See KT-13401: SOE in VarianceChecker
+interface Rec<T: Rec<T>> {
+    fun t(): T
+}
+interface Super<out U> {
+    fun foo(p: Rec<*>) = p.t()
+}
+// Related variance errors
+class Owner<in T> {
+    inner class Inner<U : <!TYPE_VARIANCE_CONFLICT!>T<!>>(val u: U) {
+        fun getT() = u
+    }
+
+    fun foo(arg: Inner<*>) = arg.getT()
+}