JS: when deciding whether inner class of a local class captures this, don't check for subtyping, since frontend generates strict classes in descriptors. Remove fix for #KT-13583, since it's no more needed. Fix #KT-13792

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java

@@ -704,6 +704,12 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             doTest(fileName);
         }
 
+        @TestMetadata("enclosingClassFromInnerLocalClass.kt")
+        public void testEnclosingClassFromInnerLocalClass() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/closure/enclosingClassFromInnerLocalClass.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("enclosingClassFromLocalClass.kt")
         public void testEnclosingClassFromLocalClass() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/closure/enclosingClassFromLocalClass.kt");

js/js.translator/src/org/jetbrains/kotlin/js/translate/context/UsageTracker.kt

@@ -115,13 +115,8 @@ class UsageTracker(
         // Class which instance we are trying to capture
         val currentClass = descriptor.containingDeclaration as? ClassDescriptor ?: return false
 
-        // We always capture enclosing class if it's not outer (i.e. we are capturing members of enclosing class to a local class)
-        if (containingClass != currentClass && containingClass.containingDeclaration !is ClassDescriptor) {
-            return false
-        }
-
         for (outerDeclaration in generateSequence(containingClass) { it.containingDeclaration as? ClassDescriptor }) {
-            if (DescriptorUtils.isSubclass(outerDeclaration, currentClass)) return true
+            if (outerDeclaration == currentClass) return true
         }
 
         return false

js/js.translator/testData/box/closure/enclosingClassFromInnerLocalClass.kt

@@ -0,0 +1,37 @@
+package foo
+
+open class X(private val x: String) {
+    fun foo(): String {
+        class B : X("fail1") {
+            inner class C {
+                fun bar() = x
+            }
+
+            fun baz() = C().bar()
+        }
+        return B().baz()
+    }
+}
+
+open class Y(private val x: String) {
+    fun foo(): String {
+        class B {
+            inner class C : Y("fail2") {
+                fun bar() = x
+            }
+
+            fun baz() = C().bar()
+        }
+        return B().baz()
+    }
+}
+
+fun box(): String {
+    val x = X("OK").foo()
+    if (x != "OK") return x
+
+    val y = Y("OK").foo()
+    if (y != "OK") return y
+
+    return "OK"
+}