Intentions: Forbid conversion of vararg parameter to receiver

idea/src/org/jetbrains/kotlin/idea/intentions/ConvertParameterToReceiverIntention.kt

@@ -31,6 +31,7 @@ import org.jetbrains.kotlin.idea.caches.resolve.analyzeFully
 
 public class ConvertParameterToReceiverIntention: JetSelfTargetingIntention<JetParameter>("convert.parameter.to.receiver.intention", javaClass()) {
     override fun isApplicableTo(element: JetParameter): Boolean {
+        if (element.isVarArg()) return false
         val function = element.getStrictParentOfType<JetNamedFunction>() ?: return false
         return function.getValueParameterList() == element.getParent() && function.getReceiverTypeReference() == null
     }

idea/testData/intentions/convertParameterToReceiver/vararg.kt

@@ -0,0 +1,8 @@
+// IS_APPLICABLE: false
+fun foo(<caret>vararg s: String): Boolean = true
+
+fun test() {
+    foo()
+    foo("1")
+    foo("1", "2")
+}

idea/tests/org/jetbrains/kotlin/idea/intentions/IntentionTestGenerated.java

@@ -2973,6 +2973,12 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
             doTest(fileName);
         }
 
+        @TestMetadata("vararg.kt")
+        public void testVararg() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/intentions/convertParameterToReceiver/vararg.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("withExtensionReceiver.kt")
         public void testWithExtensionReceiver() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/testData/intentions/convertParameterToReceiver/withExtensionReceiver.kt");