TypeConstraint: fix deep hierarchy union (IDEA-CR-31134)

java/java-tests/testData/codeInsight/completion/normal/InstanceOfDisjunctionDeep.java

@@ -0,0 +1,21 @@
+import java.math.BigInteger;
+import java.util.function.Function;
+
+class Test {
+  interface Base {
+    void baseMethod();
+  }
+
+  interface A1 extends Base {}
+  interface A2 extends Base {}
+  interface B1 extends A1 {}
+  interface B2 extends A2 {}
+  interface C1 extends B1 {}
+
+  long test(Object obj) {
+    if (obj instanceof C1 || obj instanceof A2) {
+      obj.baseMe<caret>
+    }
+    return -1;
+  }
+}

java/java-tests/testData/codeInsight/completion/normal/InstanceOfDisjunctionDeep_after.java

@@ -0,0 +1,21 @@
+import java.math.BigInteger;
+import java.util.function.Function;
+
+class Test {
+  interface Base {
+    void baseMethod();
+  }
+
+  interface A1 extends Base {}
+  interface A2 extends Base {}
+  interface B1 extends A1 {}
+  interface B2 extends A2 {}
+  interface C1 extends B1 {}
+
+  long test(Object obj) {
+    if (obj instanceof C1 || obj instanceof A2) {
+      ((Base) obj).baseMethod();
+    }
+    return -1;
+  }
+}