From 76005813ff9a8da744b971d995b9f74bf56f51e8 Mon Sep 17 00:00:00 2001
From: Ilya Goncharov <ilya.goncharov@jetbrains.com>
Date: Sat, 6 Mar 2021 14:10:20 +0300
Subject: [PATCH] [JS IR] Fix for pureness of vararg

---
 .../src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt
index 03cae8ab5a4..c3348ff020a 100644
--- a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt
+++ b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt
@@ -664,7 +664,7 @@ fun IrExpression?.isPure(
             }
             is IrCall -> context?.isSideEffectFree(this) ?: false
             is IrGetObjectValue -> type.isUnit()
-            is IrVararg -> elements.all { (it as? IrExpression).isPure(anyVariable, checkFields, context) }
+            is IrVararg -> elements.all { (it as? IrExpression)?.isPure(anyVariable, checkFields, context) == true }
             else -> false
         }
     }