[K/JS] add miss StartProjection for the substitution inside lowerings ^KT-55852 Fixed

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/export/TransitiveExportCollector.kt

@@ -66,6 +66,7 @@ class TransitiveExportCollector(val context: JsIrBackendContext) {
         return when (this) {
             is IrType -> substitute(typeSubstitutionMap)
             is IrTypeProjection -> type.substitute(typeSubstitutionMap)
+            is IrStarProjection -> context.irBuiltIns.anyNType
             else -> error("Unexpected ir type argument")
         }
     }

js/js.translator/testData/typescript-export/functions/functions.d.ts

@@ -18,5 +18,7 @@ declare namespace JS_TESTS {
         function genericWithMultipleConstraints<T extends unknown/* kotlin.Comparable<T> */ & foo.SomeExternalInterface & Error>(x: T): T;
         function generic3<A, B, C, D, E>(a: A, b: B, c: C, d: D): Nullable<E>;
         function inlineFun(x: number, callback: (p0: number) => void): void;
+        function formatList(value: any/* kotlin.collections.List<UnknownType *> */): string;
+        function createList(): any/* kotlin.collections.List<UnknownType *> */;
     }
 }

js/js.translator/testData/typescript-export/functions/functions.kt

@@ -4,6 +4,7 @@
 // SKIP_NODE_JS
 // INFER_MAIN_MODULE
 // MODULE: JS_TESTS
+// WITH_STDLIB
 // FILE: functions.kt
 
 package foo
@@ -61,3 +62,9 @@ fun <A, B, C, D, E> generic3(a: A, b: B, c: C, d: D): E? = null
 inline fun inlineFun(x: Int, callback: (Int) -> Unit) {
     callback(x)
 }
+
+@JsExport
+fun formatList(value: List<*>): String = value.joinToString(", ") { it.toString() }
+
+@JsExport
+fun createList(): List<*> = listOf(1, 2, 3)

js/js.translator/testData/typescript-export/functions/functions__main.js

@@ -23,6 +23,8 @@ var varargWithOtherParameters = JS_TESTS.foo.varargWithOtherParameters;
 var varargWithComplexType = JS_TESTS.foo.varargWithComplexType;
 var genericWithConstraint = JS_TESTS.foo.genericWithConstraint;
 var genericWithMultipleConstraints = JS_TESTS.foo.genericWithMultipleConstraints;
+var formatList = JS_TESTS.foo.formatList;
+var createList = JS_TESTS.foo.createList;
 function assert(condition) {
     if (!condition) {
         throw "Assertion failed";
@@ -55,5 +57,6 @@ function box() {
     var result = 0;
     inlineFun(10, function (x) { result = x; });
     assert(result === 10);
+    assert(formatList(createList()) === "1, 2, 3");
     return "OK";
 }

js/js.translator/testData/typescript-export/functions/functions__main.ts

@@ -11,7 +11,8 @@ import varargWithOtherParameters = JS_TESTS.foo.varargWithOtherParameters;
 import varargWithComplexType = JS_TESTS.foo.varargWithComplexType;
 import genericWithConstraint = JS_TESTS.foo.genericWithConstraint;
 import genericWithMultipleConstraints = JS_TESTS.foo.genericWithMultipleConstraints;
-
+import formatList = JS_TESTS.foo.formatList;
+import createList = JS_TESTS.foo.createList;
 function assert(condition: boolean) {
     if (!condition) {
         throw "Assertion failed";
@@ -54,5 +55,7 @@ function box(): string {
     inlineFun(10, x => { result = x; });
     assert(result === 10);
 
+    assert(formatList(createList()) === "1, 2, 3")
+
     return "OK";
 }