From 14dc74b55ee95f4f7daf9fb527cb2c2662a2b3d6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Yann=20C=C3=A9bron?= <yann.cebron@jetbrains.com>
Date: Thu, 9 Nov 2017 17:33:10 +0100
Subject: [PATCH] [devkit] LanguageResolvingUtil: prevent (very unlikely) empty
 list

---
 plugins/devkit/src/dom/impl/LanguageResolvingUtil.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/plugins/devkit/src/dom/impl/LanguageResolvingUtil.java b/plugins/devkit/src/dom/impl/LanguageResolvingUtil.java
index a8a55f5b4400..2559a4c4600b 100644
--- a/plugins/devkit/src/dom/impl/LanguageResolvingUtil.java
+++ b/plugins/devkit/src/dom/impl/LanguageResolvingUtil.java
@@ -35,6 +35,7 @@ import com.intellij.psi.util.CachedValueProvider.Result;
 import com.intellij.psi.util.CachedValuesManager;
 import com.intellij.psi.util.PsiModificationTracker;
 import com.intellij.util.NullableFunction;
+import com.intellij.util.SmartList;
 import com.intellij.util.containers.ContainerUtil;
 import com.intellij.util.xml.ConvertContext;
 import com.intellij.util.xml.DomJavaUtil;
@@ -75,7 +76,7 @@ class LanguageResolvingUtil {
         return Result.create(allInheritors, PsiModificationTracker.JAVA_STRUCTURE_MODIFICATION_COUNT);
       });
     if (allLanguages.isEmpty()) {
-      return Collections.emptyList();
+      return new SmartList<>();
     }
 
     final List<LanguageDefinition> libraryDefinitions = collectLibraryLanguages(context, allLanguages);