From b6a5d30469536498cafb9aed6264bc082a401915 Mon Sep 17 00:00:00 2001
From: Alexey Sedunov <alexey.sedunov@jetbrains.com>
Date: Thu, 19 Nov 2015 20:31:57 +0300
Subject: [PATCH] Inspections: Forbid equals/hashCode inspection on object with
 explicit supertypes  #KT-9778 Fixed

---
 .../idea/inspections/EqualsOrHashCodeInspection.kt     |  2 ++
 idea/testData/inspections/equalsAndHashCode/test.kt    | 10 ++++++++++
 2 files changed, 12 insertions(+)

diff --git a/idea/src/org/jetbrains/kotlin/idea/inspections/EqualsOrHashCodeInspection.kt b/idea/src/org/jetbrains/kotlin/idea/inspections/EqualsOrHashCodeInspection.kt
index a08db2b84a9..30d981b0672 100644
--- a/idea/src/org/jetbrains/kotlin/idea/inspections/EqualsOrHashCodeInspection.kt
+++ b/idea/src/org/jetbrains/kotlin/idea/inspections/EqualsOrHashCodeInspection.kt
@@ -34,6 +34,7 @@ import org.jetbrains.kotlin.psi.KtObjectDeclaration
 import org.jetbrains.kotlin.psi.KtVisitorVoid
 import org.jetbrains.kotlin.psi.psiUtil.getStrictParentOfType
 import org.jetbrains.kotlin.resolve.source.getPsi
+import org.jetbrains.kotlin.types.typeUtil.supertypes
 
 object DeleteEqualsAndHashCodeFix : LocalQuickFix {
     override fun getName() = "Delete equals()/hashCode()"
@@ -76,6 +77,7 @@ class EqualsOrHashCodeInspection : AbstractKotlinInspection() {
 
                 when (classDescriptor.kind) {
                     ClassKind.OBJECT -> {
+                        if (classOrObject.getDelegationSpecifiers().isNotEmpty()) return
                         holder.registerProblem(nameIdentifier, "equals()/hashCode() in object declaration", DeleteEqualsAndHashCodeFix)
                     }
                     ClassKind.CLASS -> {
diff --git a/idea/testData/inspections/equalsAndHashCode/test.kt b/idea/testData/inspections/equalsAndHashCode/test.kt
index 2bd043e6030..2d40a3cd466 100644
--- a/idea/testData/inspections/equalsAndHashCode/test.kt
+++ b/idea/testData/inspections/equalsAndHashCode/test.kt
@@ -36,4 +36,14 @@ interface I {
 enum E {
     override fun equals(other: Any?) = true
     override fun hashCode() = 0
+}
+
+abstract class T
+
+object O4 : A() {
+    override fun equals(other: Any?) = true
+}
+
+object O5 : A() {
+    override fun hashCode() = 0
 }
\ No newline at end of file