[JS IR] Update an error on cross-module symbol redeclaration

The temporary solution for KT-50546.

The complete solution requires the understanding,
whether a cross-module symbol redeclaration is a valid case or not.
If the case is valid, the linker symbol table logic must be reworked.

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/JsIrProgramFragment.kt

@@ -99,8 +99,11 @@ private class JsIrModuleCrossModuleReferecenceBuilder(val module: JsIrModule, va
         val tagToName = module.fragments.flatMap { it.nameBindings.entries }.associate { it.key to it.value }
 
         val resultImports = imports.associate {
-
             val tag = it.tag
+            require(it.module::exportNames.isInitialized) {
+                // This situation appears in case of a dependent module redefine a symbol (function) from their dependency
+                "Cross module dependency resolution failed due to symbol '${tag.takeWhile { c -> c != '|' }}' redefinition"
+            }
             val exportedAs = it.module.exportNames[tag]!!
             val importedAs = tagToName[tag]!!
             val moduleName = it.module.module.import()

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/BoxJsTestGenerated.java

@@ -6922,6 +6922,12 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             runTest("js/js.translator/testData/box/multiModule/samePackageNames.kt");
         }
 
+        @Test
+        @TestMetadata("symbolRedeclaration.kt")
+        public void testSymbolRedeclaration() throws Exception {
+            runTest("js/js.translator/testData/box/multiModule/symbolRedeclaration.kt");
+        }
+
         @Test
         @TestMetadata("useElementsFromDefaultPackageInAnotherModule.kt")
         public void testUseElementsFromDefaultPackageInAnotherModule() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrBoxJsTestGenerated.java

@@ -7306,6 +7306,12 @@ public class IrBoxJsTestGenerated extends AbstractIrBoxJsTest {
             runTest("js/js.translator/testData/box/multiModule/samePackageNames.kt");
         }
 
+        @Test
+        @TestMetadata("symbolRedeclaration.kt")
+        public void testSymbolRedeclaration() throws Exception {
+            runTest("js/js.translator/testData/box/multiModule/symbolRedeclaration.kt");
+        }
+
         @Test
         @TestMetadata("useElementsFromDefaultPackageInAnotherModule.kt")
         public void testUseElementsFromDefaultPackageInAnotherModule() throws Exception {

js/js.translator/testData/box/multiModule/symbolRedeclaration.kt

@@ -0,0 +1,24 @@
+// IGNORE_BACKEND: JS_IR
+
+// MODULE: AT
+// FILE: at.kt
+package foo
+
+fun redeclaredFunction(): String = "OK"
+
+// MODULE: A(AT)
+// FILE: a.kt
+package foo
+
+fun userFunction(): String = redeclaredFunction()
+
+// MODULE: main(A)
+// FILE: main.kt
+package foo
+
+fun redeclaredFunction(): String = "Fail"
+
+fun box(): String {
+    assertEquals(redeclaredFunction(), "Fail")
+    return userFunction()
+}