Fixed EA-75877

core/descriptors/src/org/jetbrains/kotlin/renderer/RenderingUtils.kt

@@ -17,6 +17,7 @@
 package org.jetbrains.kotlin.renderer
 
 import org.jetbrains.kotlin.descriptors.*
+import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.FqNameUnsafe
 import org.jetbrains.kotlin.name.Name
 
@@ -51,6 +52,10 @@ public fun FqNameUnsafe.render(): String {
     return renderFqName(pathSegments())
 }
 
+public fun FqName.render(): String {
+    return renderFqName(pathSegments())
+}
+
 public fun renderFqName(pathSegments: List<Name>): String {
     return buildString {
         for (element in pathSegments) {

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KtSimpleNameReference.kt

@@ -39,6 +39,7 @@ import org.jetbrains.kotlin.psi.psiUtil.getParentOfTypeAndBranch
 import org.jetbrains.kotlin.psi.psiUtil.getQualifiedElement
 import org.jetbrains.kotlin.psi.psiUtil.getQualifiedElementSelector
 import org.jetbrains.kotlin.psi.psiUtil.startOffset
+import org.jetbrains.kotlin.renderer.render
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.dataClassUtils.isComponentLike
 import org.jetbrains.kotlin.types.expressions.OperatorConventions
@@ -179,14 +180,14 @@ class KtSimpleNameReference(expression: KtSimpleNameExpression) : KtSimpleRefere
     private fun KtNameReferenceExpression.changeQualifiedName(fqName: FqName): KtElement {
         assert(!fqName.isRoot()) { "Can't set empty FqName for element $this" }
 
-        val shortName = fqName.shortName().asString()
+        val shortName = fqName.shortName().render()
         val psiFactory = KtPsiFactory(this)
         val fqNameBase = (getParent() as? KtCallExpression)?.let { parent ->
             val callCopy = parent.copy() as KtCallExpression
             callCopy.getCalleeExpression()!!.replace(psiFactory.createSimpleName(shortName)).getParent()!!.getText()
         } ?: shortName
 
-        val text = if (!fqName.isOneSegmentFQN()) "${fqName.parent().asString()}.$fqNameBase" else fqNameBase
+        val text = if (!fqName.isOneSegmentFQN()) "${fqName.parent().render()}.$fqNameBase" else fqNameBase
 
         val elementToReplace = getQualifiedElement()
         return when (elementToReplace) {

idea/testData/copyPaste/imports/KeywordClassName.expected.kt

@@ -0,0 +1,6 @@
+// ERROR: A 'return' expression required in a function with a block body ('{...}')
+package to
+
+import d.`class`
+
+fun foo(): `class` {}

idea/testData/copyPaste/imports/KeywordClassName.expected.names

@@ -0,0 +1 @@
+d.class

idea/testData/copyPaste/imports/KeywordClassName.kt

@@ -0,0 +1,6 @@
+// WITH_LIBRARY: copyPaste/imports/KotlinLibrary
+package a
+
+import d.*
+
+<selection>fun foo(): `class` {}</selection>

idea/testData/copyPaste/imports/KotlinLibrary/KeywordNames.kt

@@ -0,0 +1,3 @@
+package d
+
+class `class`

idea/tests/org/jetbrains/kotlin/idea/codeInsight/InsertImportOnPasteTestGenerated.java

@@ -259,6 +259,12 @@ public class InsertImportOnPasteTestGenerated extends AbstractInsertImportOnPast
             doTestCopy(fileName);
         }
 
+        @TestMetadata("KeywordClassName.kt")
+        public void testKeywordClassName() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/copyPaste/imports/KeywordClassName.kt");
+            doTestCopy(fileName);
+        }
+
         @TestMetadata("Local.kt")
         public void testLocal() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/copyPaste/imports/Local.kt");
@@ -604,6 +610,12 @@ public class InsertImportOnPasteTestGenerated extends AbstractInsertImportOnPast
             doTestCut(fileName);
         }
 
+        @TestMetadata("KeywordClassName.kt")
+        public void testKeywordClassName() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/copyPaste/imports/KeywordClassName.kt");
+            doTestCut(fileName);
+        }
+
         @TestMetadata("Local.kt")
         public void testLocal() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/copyPaste/imports/Local.kt");