JS: a cross-module local declaration fake override test;

Also describe an alternative, more robust approach in a TODO comment

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

@@ -3880,6 +3880,11 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             runTest("js/js.translator/testData/box/inline/fakeOverrideInlining.kt");
         }
 
+        @TestMetadata("fakeOverrideInliningCrossModule.kt")
+        public void testFakeOverrideInliningCrossModule() throws Exception {
+            runTest("js/js.translator/testData/box/inline/fakeOverrideInliningCrossModule.kt");
+        }
+
         @TestMetadata("faultyRedundantCallElimination.kt")
         public void testFaultyRedundantCallElimination() throws Exception {
             runTest("js/js.translator/testData/box/inline/faultyRedundantCallElimination.kt");

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

@@ -3880,6 +3880,11 @@ public class IrBoxJsTestGenerated extends AbstractIrBoxJsTest {
             runTest("js/js.translator/testData/box/inline/fakeOverrideInlining.kt");
         }
 
+        @TestMetadata("fakeOverrideInliningCrossModule.kt")
+        public void testFakeOverrideInliningCrossModule() throws Exception {
+            runTest("js/js.translator/testData/box/inline/fakeOverrideInliningCrossModule.kt");
+        }
+
         @TestMetadata("faultyRedundantCallElimination.kt")
         public void testFaultyRedundantCallElimination() throws Exception {
             runTest("js/js.translator/testData/box/inline/faultyRedundantCallElimination.kt");

js/js.translator/src/org/jetbrains/kotlin/js/translate/general/Merger.kt

@@ -218,6 +218,8 @@ class Merger(
         }
     }
 
+    // TODO consider using metadata to determine current-module fake override statements
+    // The approach could be similar to JsName.alias which is used to avoid re-importing current module declarations
     private fun JsStatement?.isFakeOverrideAssignment(): Boolean {
         fun JsExpression?.isMemberReference(): Boolean {
             val qualifier = (this as? JsNameRef)?.qualifier as? JsNameRef ?: return false

js/js.translator/testData/box/inline/fakeOverrideInliningCrossModule.kt

@@ -0,0 +1,21 @@
+// EXPECTED_REACHABLE_NODES: 1300
+// MODULE: libA
+// FILE: libA.kt
+inline fun foo() = (object : II {}).ok()
+
+interface I {
+    fun ok() = "OK"
+}
+
+interface II: I
+
+// MODULE: libB(libA)
+// FILE: libB.kt
+
+inline fun bar() = foo()
+
+// MODULE: main(libB)
+// FILE: main.kt
+fun box() = bar()
+
+