Fix NPE in GotoSuperActionHandler.java (EA-77295)

idea/src/org/jetbrains/kotlin/idea/codeInsight/GotoSuperActionHandler.java

@@ -65,7 +65,7 @@ public class GotoSuperActionHandler implements CodeInsightActionHandler {
 
         List<PsiElement> superDeclarations = findSuperDeclarations(descriptor);
 
-        if (superDeclarations.isEmpty()) return;
+        if (superDeclarations == null || superDeclarations.isEmpty()) return;
         if (superDeclarations.size() == 1) {
             Navigatable navigatable = EditSourceUtil.getDescriptor(superDeclarations.get(0));
             if (navigatable != null && navigatable.canNavigate()) {
@@ -100,6 +100,7 @@ public class GotoSuperActionHandler implements CodeInsightActionHandler {
         return null;
     }
 
+    @Nullable
     private static List<PsiElement> findSuperDeclarations(DeclarationDescriptor descriptor) {
         Collection<? extends DeclarationDescriptor> superDescriptors;
         if (descriptor instanceof ClassDescriptor) {

idea/testData/navigation/gotoSuper/BadPositionLambdaParameter.test

@@ -0,0 +1,8 @@
+// FILE: before.kt
+fun test() {
+    val a = { <caret>a: Int -> 1}
+}
+// FILE: after.kt
+fun test() {
+    val a = { <caret>a: Int -> 1}
+}

idea/tests/org/jetbrains/kotlin/idea/navigation/GotoSuperTestGenerated.java

@@ -35,6 +35,12 @@ public class GotoSuperTestGenerated extends AbstractGotoSuperTest {
         KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/navigation/gotoSuper"), Pattern.compile("^(.+)\\.test$"), true);
     }
 
+    @TestMetadata("BadPositionLambdaParameter.test")
+    public void testBadPositionLambdaParameter() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/navigation/gotoSuper/BadPositionLambdaParameter.test");
+        doTest(fileName);
+    }
+
     @TestMetadata("ClassSimple.test")
     public void testClassSimple() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/testData/navigation/gotoSuper/ClassSimple.test");