JS: fix identifier generation in delegate constructor calls

See KT-21093

compiler/testData/codegen/box/classes/delegateConstructorCallWithKeywords.kt

@@ -0,0 +1,30 @@
+open class A(val x: String) {
+    constructor(`in`: String, y: String) : this(`in` + y)
+
+    constructor(`in`: Int = 23) : this(`in`.toString())
+}
+
+class B(`in`: String) : A(`in`)
+
+class C : A {
+    constructor(`in`: String) : super(`in`)
+}
+
+fun box(): String {
+    val a1 = A("a", "b")
+    if (a1.x != "ab") return "fail1: ${a1.x}"
+
+    val a2 = A(42)
+    if (a2.x != "42") return "fail2: ${a2.x}"
+
+    val a3 = A()
+    if (a3.x != "23") return "fail3: ${a3.x}"
+
+    val b = B("q")
+    if (b.x != "q") return "fail4: ${b.x}"
+
+    val c = C("w")
+    if (c.x != "w") return "fail5: ${c.x}"
+
+    return "OK"
+}

compiler/tests-ir-jvm/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java

@@ -2999,6 +2999,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             doTest(fileName);
         }
 
+        @TestMetadata("delegateConstructorCallWithKeywords.kt")
+        public void testDelegateConstructorCallWithKeywords() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/classes/delegateConstructorCallWithKeywords.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("delegation2.kt")
         public void testDelegation2() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/classes/delegation2.kt");

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -2999,6 +2999,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             doTest(fileName);
         }
 
+        @TestMetadata("delegateConstructorCallWithKeywords.kt")
+        public void testDelegateConstructorCallWithKeywords() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/classes/delegateConstructorCallWithKeywords.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("delegation2.kt")
         public void testDelegation2() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/classes/delegation2.kt");

compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -2999,6 +2999,12 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             doTest(fileName);
         }
 
+        @TestMetadata("delegateConstructorCallWithKeywords.kt")
+        public void testDelegateConstructorCallWithKeywords() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/classes/delegateConstructorCallWithKeywords.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("delegation2.kt")
         public void testDelegation2() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/classes/delegation2.kt");

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

@@ -3581,6 +3581,12 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             doTest(fileName);
         }
 
+        @TestMetadata("delegateConstructorCallWithKeywords.kt")
+        public void testDelegateConstructorCallWithKeywords() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/classes/delegateConstructorCallWithKeywords.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("delegation2.kt")
         public void testDelegation2() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/classes/delegation2.kt");

js/js.translator/src/org/jetbrains/kotlin/js/translate/declaration/ClassTranslator.kt

@@ -253,8 +253,8 @@ class ClassTranslator private constructor(
         context.addDeclarationStatement(constructorInitializer.makeStmt())
 
         context = context.contextWithScope(constructorInitializer)
-        context.translateAndAliasParameters(constructorDescriptor, constructorInitializer.parameters)
-                .translateFunction(constructor, constructorInitializer)
+                .translateAndAliasParameters(constructorDescriptor, constructorInitializer.parameters)
+        context.translateFunction(constructor, constructorInitializer)
 
         // Translate super/this call
         val superCallGenerators = mutableListOf<(MutableList<JsStatement>) -> Unit>()