IDEA-46653 Completion in parameter list should not insert a trailing comma if the following parameter is varargs

java/java-impl/src/com/intellij/codeInsight/ExpectedTypesProvider.java

@@ -953,7 +953,7 @@ public class ExpectedTypesProvider {
       if (index >= params.length) {
         return TailType.NONE;
       }
-      if (index == params.length - 1) {
+      if (index == params.length - 1 || index == params.length - 2 && params[index + 1].isVarArgs()) {
         //myTailType = CompletionUtil.NONE_TAIL;
         final PsiElement call = argument.getParent().getParent();
         if (call instanceof JspMethodCall) return TailType.NONE;

java/java-tests/testData/codeInsight/completion/smartType/NoCommaBeforeVarargs-out.java

@@ -0,0 +1,8 @@
+class Foooo {
+    int bar(int a, Object... varargs) {}
+
+    int foo() {
+        bar(hashCode())<caret>;
+    }
+
+}

java/java-tests/testData/codeInsight/completion/smartType/NoCommaBeforeVarargs.java

@@ -0,0 +1,8 @@
+class Foooo {
+    int bar(int a, Object... varargs) {}
+
+    int foo() {
+        bar(ha<caret>);
+    }
+
+}

java/java-tests/testSrc/com/intellij/codeInsight/completion/SmartTypeCompletionTest.java

@@ -875,6 +875,8 @@ public class SmartTypeCompletionTest extends LightFixtureCompletionTestCase {
     doTest();
   }
 
+  public void testNoCommaBeforeVarargs() throws Throwable { doTest(); }
+
   public void testEnumField() throws Throwable {
     doItemTest();
   }