KT-8442 related: correct handling of erroneous destructuring references, fixes EA-90434

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

@@ -47,7 +47,8 @@ class KtDestructuringDeclarationReference(element: KtDestructuringDeclarationEnt
 
     override val resolvesByNames: Collection<Name>
         get() {
-            val componentIndex = (element.parent as KtDestructuringDeclaration).entries.indexOf(element) + 1
+            val destructuringParent = element.parent as? KtDestructuringDeclaration ?: return emptyList()
+            val componentIndex = destructuringParent.entries.indexOf(element) + 1
             return listOf(Name.identifier("component$componentIndex"))
         }
 }

idea/testData/quickfix/optimizeImports/destructuringAtTop.kt

@@ -0,0 +1,5 @@
+// "Optimize imports" "true"
+
+<caret>import kotlin.collections.*
+
+val (a, b, c) = Triple(1, 2, 3)

idea/testData/quickfix/optimizeImports/destructuringAtTop.kt.after

@@ -0,0 +1,3 @@
+// "Optimize imports" "true"
+
+val (a, b, c) = Triple(1, 2, 3)

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

@@ -6575,6 +6575,12 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/quickfix/optimizeImports"), Pattern.compile("^([\\w\\-_]+)\\.kt$"), true);
         }
 
+        @TestMetadata("destructuringAtTop.kt")
+        public void testDestructuringAtTop() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/optimizeImports/destructuringAtTop.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("fileRuntime.kt")
         public void testFileRuntime() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/optimizeImports/fileRuntime.kt");