From 68df2df462379c90598126729e4239e40621157d Mon Sep 17 00:00:00 2001
From: "Nikolay.Tropin" <nikolay.tropin@jetbrains.com>
Date: Mon, 23 Dec 2019 12:46:50 +0300
Subject: [PATCH] fast return in case of empty scope

e.g. it may be the case when trying to find Groovy usages in a non-groovy file
#SCL-16771

GitOrigin-RevId: a2a604369343164a39e8db32541b3fdfcd2297d3
---
 .../intellij/psi/impl/search/AllClassesSearchExecutor.java    | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/java/java-indexing-impl/src/com/intellij/psi/impl/search/AllClassesSearchExecutor.java b/java/java-indexing-impl/src/com/intellij/psi/impl/search/AllClassesSearchExecutor.java
index 2e770adfd234..3e5c3b95d354 100644
--- a/java/java-indexing-impl/src/com/intellij/psi/impl/search/AllClassesSearchExecutor.java
+++ b/java/java-indexing-impl/src/com/intellij/psi/impl/search/AllClassesSearchExecutor.java
@@ -30,6 +30,10 @@ public class AllClassesSearchExecutor implements QueryExecutor<PsiClass, AllClas
   public boolean execute(@NotNull final AllClassesSearch.SearchParameters queryParameters, @NotNull final Processor<? super PsiClass> consumer) {
     SearchScope scope = queryParameters.getScope();
 
+    if (scope == GlobalSearchScope.EMPTY_SCOPE) {
+      return true;
+    }
+
     if (scope instanceof GlobalSearchScope) {
       PsiManager manager = PsiManager.getInstance(queryParameters.getProject());
       manager.startBatchFilesProcessingMode();