From b57b0fd1e1a63b0f3f9d19bde3b0d4a16ee34698 Mon Sep 17 00:00:00 2001
From: Maksim Khramov <maxtemplaar@gmail.com>
Date: Sun, 9 Oct 2022 17:56:25 +0300
Subject: [PATCH] Fix for Gradle project sources popup menu invocation error
 #4755

---
 .../languages/antlr/refactoring/RefactoringActionsProvider.java  | 1 +
 1 file changed, 1 insertion(+)

diff --git a/java/languages.antlr/src/org/netbeans/modules/languages/antlr/refactoring/RefactoringActionsProvider.java b/java/languages.antlr/src/org/netbeans/modules/languages/antlr/refactoring/RefactoringActionsProvider.java
index 87bce7adeaeb..b3bfc69bb507 100644
--- a/java/languages.antlr/src/org/netbeans/modules/languages/antlr/refactoring/RefactoringActionsProvider.java
+++ b/java/languages.antlr/src/org/netbeans/modules/languages/antlr/refactoring/RefactoringActionsProvider.java
@@ -97,6 +97,7 @@ public boolean canFindUsages(Lookup lookup) {
         EditorCookie ec = lookup.lookup(EditorCookie.class);
         if (ec != null) {
             Document doc = ec.getDocument();
+            if(doc == null) return ret;
             FileObject file = NbEditorUtilities.getFileObject(doc);
             ret = Antlr3Language.MIME_TYPE.equals(file.getMIMEType())
                     || Antlr4Language.MIME_TYPE.equals(file.getMIMEType());