From 80c888528e674a0cab54e6994e64e51ed313dafe Mon Sep 17 00:00:00 2001
From: Dmitry Batkovich <dmitry.batkovich@jetbrains.com>
Date: Tue, 11 Oct 2016 10:13:40 +0300
Subject: [PATCH] inspection view: npe in preview editor while folding append
 EA-89543

---
 .../codeInspection/ui/ProblemPreviewEditorPresentation.java      | 1 +
 1 file changed, 1 insertion(+)

diff --git a/platform/lang-impl/src/com/intellij/codeInspection/ui/ProblemPreviewEditorPresentation.java b/platform/lang-impl/src/com/intellij/codeInspection/ui/ProblemPreviewEditorPresentation.java
index 1a2803e9b0cb..9397b93905a9 100644
--- a/platform/lang-impl/src/com/intellij/codeInspection/ui/ProblemPreviewEditorPresentation.java
+++ b/platform/lang-impl/src/com/intellij/codeInspection/ui/ProblemPreviewEditorPresentation.java
@@ -127,6 +127,7 @@ public class ProblemPreviewEditorPresentation {
   }
 
   private boolean appendFoldings(Segment toShowRange) {
+    if (toShowRange == null) return false;
     boolean isUpdated = false;
     final int startLine = Math.max(0, myDocument.getLineNumber(toShowRange.getStartOffset()) - 1);
     final int endLine = Math.min(myDocument.getLineCount(), myDocument.getLineNumber(toShowRange.getEndOffset()) + 2);