From 3bc744af3536241361740e78c681f3e2b1cfefd4 Mon Sep 17 00:00:00 2001
From: Dmitriy Dolovov <Dmitriy.Dolovov@jetbrains.com>
Date: Mon, 24 Apr 2023 21:16:38 +0200
Subject: [PATCH] [PL] Fix: Don't raise an error for unimplemented callables in
 external classes

^KT-57378
---
 .../common/linkage/partial/IrUnimplementedOverridesStrategy.kt   | 1 +
 1 file changed, 1 insertion(+)

diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/linkage/partial/IrUnimplementedOverridesStrategy.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/linkage/partial/IrUnimplementedOverridesStrategy.kt
index 9934488d660..eedbd4dad4e 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/linkage/partial/IrUnimplementedOverridesStrategy.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/linkage/partial/IrUnimplementedOverridesStrategy.kt
@@ -20,6 +20,7 @@ internal class ImplementAsErrorThrowingStubs(
     override fun <T : IrOverridableMember> computeCustomization(overridableMember: T, parent: IrClass) =
         if (overridableMember.isAbstract
             && parent.isConcrete
+            && !parent.isExternal
             && !parent.delegatesToNothing
             && !partialLinkageSupport.shouldBeSkipped(parent)
         ) {