CreateTypeParameterFromUsageFix: fix KNPE for type alias

#KT-33302 Fixed
#EA-120181 Fixed

idea/idea-core/src/org/jetbrains/kotlin/idea/core/psiModificationUtils.kt

@@ -489,9 +489,10 @@ fun KtTypeParameterListOwner.addTypeParameter(typeParameter: KtTypeParameter): K
     val list = KtPsiFactory(this).createTypeParameterList("<X>")
     list.parameters[0].replace(typeParameter)
     val leftAnchor = when (this) {
-        is KtClass -> nameIdentifier ?: getClassOrInterfaceKeyword()
+        is KtClass -> nameIdentifier
         is KtNamedFunction -> funKeyword
         is KtProperty -> valOrVarKeyword
+        is KtTypeAlias -> nameIdentifier
         else -> null
     } ?: return null
     return (addAfter(list, leftAnchor) as KtTypeParameterList).parameters.first()

idea/src/org/jetbrains/kotlin/idea/quickfix/createFromUsage/createTypeParameter/CreateTypeParameterFromUsageFix.kt

@@ -97,7 +97,8 @@ class CreateTypeParameterFromUsageFix(
                 } else null
                 val upperBound = upperBoundText?.let { psiFactory.createType(it) }
                 val newTypeParameterText = if (upperBound != null) "${typeParameter.name} : ${upperBound.text}" else typeParameter.name
-                val newTypeParameter = declaration.addTypeParameter(psiFactory.createTypeParameter(newTypeParameterText))!!
+                val newTypeParameter = declaration.addTypeParameter(psiFactory.createTypeParameter(newTypeParameterText))
+                    ?: error("Couldn't create type parameter from '$newTypeParameterText' for '$declaration'")
                 elementsToShorten += newTypeParameter
 
                 val anonymizedTypeParameter = createFakeTypeParameterDescriptor(typeParameter.fakeTypeParameter.containingDeclaration, "_")

idea/testData/quickfix/createFromUsage/createTypeParameter/inReferencedDeclaration/typealias.kt

@@ -0,0 +1,6 @@
+// "Create type parameter in type alias 'G'" "true"
+
+class C
+typealias G = C
+
+fun <T> a(g: G<T<caret>>) = Unit

idea/testData/quickfix/createFromUsage/createTypeParameter/inReferencedDeclaration/typealias.kt.after

@@ -0,0 +1,6 @@
+// "Create type parameter in type alias 'G'" "true"
+
+class C
+typealias G<T> = C
+
+fun <T> a(g: G<T>) = Unit

idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java

@@ -4780,6 +4780,11 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
                 public void testNotOnTypeArgumentList() throws Exception {
                     runTest("idea/testData/quickfix/createFromUsage/createTypeParameter/inReferencedDeclaration/notOnTypeArgumentList.kt");
                 }
+
+                @TestMetadata("typealias.kt")
+                public void testTypealias() throws Exception {
+                    runTest("idea/testData/quickfix/createFromUsage/createTypeParameter/inReferencedDeclaration/typealias.kt");
+                }
             }
         }