From 051310124b9b9b462eca3c89bef9ed21a50ef489 Mon Sep 17 00:00:00 2001
From: Ilya Kirillov <ilya.kirillov@jetbrains.com>
Date: Thu, 15 Apr 2021 16:39:25 +0200
Subject: [PATCH] FIR IDE: do not fail duplicating classes with members

---
 .../kotlin/idea/fir/low/level/api/util/declarationUtils.kt      | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/util/declarationUtils.kt b/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/util/declarationUtils.kt
index a3767f9196f..373b97d7e04 100644
--- a/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/util/declarationUtils.kt
+++ b/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/util/declarationUtils.kt
@@ -103,7 +103,7 @@ private fun KtDeclaration.findSourceNonLocalFirDeclarationByProvider(
             val containingClass = containingClassOrObject
                 ?: error("Container class should be not null for KtConstructor")
             val containerClassFir = containingClass.findFir(firSymbolProvider) ?: return null
-            containerClassFir.declarations.first { it.psi === this }
+            containerClassFir.declarations.firstOrNull { it.psi === this }
         }
         this is KtTypeAlias -> findFir(firSymbolProvider)
         else -> error("Invalid container ${this::class}\n${getElementTextInContext()}")