Convert primary constructor to secondary: KNPE fixed #KT-14745 Fixed

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

@@ -79,7 +79,7 @@ class ConvertPrimaryConstructorToSecondaryIntention : SelfTargetingIntention<KtP
                     for (valueParameter in element.valueParameters) {
                         val annotations = valueParameter.annotationEntries.joinToString(separator = " ") { it.text }
                         val vararg = if (valueParameter.isVarArg) VARARG_KEYWORD.value else ""
-                        param("$annotations $vararg ${valueParameter.name!!}",
+                        param("$annotations $vararg ${valueParameter.name ?: ""}",
                               valueParameter.typeReference!!.text, valueParameter.defaultValue?.text)
                     }
                     noReturnType()

idea/testData/intentions/convertPrimaryConstructorToSecondary/noArgName.kt

@@ -0,0 +1,2 @@
+
+class My<caret>(: Int)

idea/testData/intentions/convertPrimaryConstructorToSecondary/noArgName.kt.after

@@ -0,0 +1,4 @@
+
+class My {
+    constructor(: Int)
+}

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

@@ -4580,6 +4580,12 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
             doTest(fileName);
         }
 
+        @TestMetadata("noArgName.kt")
+        public void testNoArgName() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/convertPrimaryConstructorToSecondary/noArgName.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("paramsAndProperties.kt")
         public void testParamsAndProperties() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/convertPrimaryConstructorToSecondary/paramsAndProperties.kt");