From 8e3f8c4c148122c0adcc682db77f670acbe20f18 Mon Sep 17 00:00:00 2001
From: "Pavel V. Talanov" <talanov.pavel@gmail.com>
Date: Thu, 20 Jul 2017 18:51:50 +0300
Subject: [PATCH] Fix calling GSS.union for empty array

 EA-104046
---
 .../kotlin/idea/decompiler/navigation/SourceNavigationHelper.kt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/navigation/SourceNavigationHelper.kt b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/navigation/SourceNavigationHelper.kt
index 08fdfd6d5ea..1322b6e977c 100644
--- a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/navigation/SourceNavigationHelper.kt
+++ b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/navigation/SourceNavigationHelper.kt
@@ -72,7 +72,7 @@ object SourceNavigationHelper {
         }
     }
 
-    private fun Collection<GlobalSearchScope>.union() = GlobalSearchScope.union(this.toTypedArray())
+    private fun Collection<GlobalSearchScope>.union() = if (this.isNotEmpty()) GlobalSearchScope.union(this.toTypedArray()) else null
 
     private fun haveRenamesInImports(files: Collection<KtFile>) = files.any { it.importDirectives.any { it.aliasName != null } }