JS backend: fix get mangling name for generic methods with multiply upper bounds

js/js.tests/test/org/jetbrains/k2js/test/semantics/NameClashesTest.java

@@ -36,4 +36,8 @@ public final class NameClashesTest extends SingleFileTranslationTest {
     public void testDifferenceInCapitalization() throws Exception {
         checkFooBoxIsOk();
     }
+
+    public void testMethodOverloadInClassWithTwoUpperBounds() throws Exception {
+        checkFooBoxIsOk();
+    }
 }

js/js.translator/src/org/jetbrains/k2js/translate/utils/TranslationUtils.java

@@ -137,13 +137,17 @@ public final class TranslationUtils {
     }
 
     @NotNull
-    public static String getJetTypeFqName(@NotNull JetType jetType, boolean printTypeArguments) {
+    public static String getJetTypeFqName(@NotNull JetType jetType, final boolean printTypeArguments) {
         ClassifierDescriptor declaration = jetType.getConstructor().getDeclarationDescriptor();
         assert declaration != null;
 
         if (declaration instanceof TypeParameterDescriptor) {
-            TypeParameterDescriptor typeParameter = (TypeParameterDescriptor) declaration;
-            return getJetTypeFqName(typeParameter.getUpperBoundsAsType(), printTypeArguments);
+            return StringUtil.join(((TypeParameterDescriptor) declaration).getUpperBounds(), new Function<JetType, String>() {
+                @Override
+                public String fun(JetType type) {
+                    return getJetTypeFqName(type, printTypeArguments);
+                }
+            }, "&");
         }
 
         List<TypeProjection> typeArguments = jetType.getArguments();

js/js.translator/testData/nameClashes/cases/methodOverloadInClassWithTwoUpperBounds.kt

@@ -0,0 +1,29 @@
+package foo
+
+trait TraitA
+trait TraitB
+
+public open abstract class Node<T : TraitA>() where T : TraitB {
+    public abstract fun bar(arg: T): String
+    public abstract fun bar(arg: TraitA): String
+    public abstract fun bar(arg: TraitB): String
+}
+
+class ClassAB : TraitA, TraitB
+
+public class MyNode : Node<ClassAB>() {
+    override fun bar(arg: ClassAB): String = "MyNode.bar(ClassAB)"
+    override fun bar(arg: TraitA): String = "MyNode.bar(TraitA)"
+    override fun bar(arg: TraitB): String = "MyNode.bar(TraitB)"
+}
+
+
+fun box(): String {
+
+    var node = MyNode()
+    assertEquals("MyNode.bar(ClassAB)", node.bar(ClassAB()))
+    assertEquals("MyNode.bar(TraitA)", node.bar(ClassAB(): TraitA))
+    assertEquals("MyNode.bar(TraitB)", node.bar(ClassAB(): TraitB))
+
+    return "OK"
+}