From 6a4b658ad4075d9de42234e054c0108969ce0ff0 Mon Sep 17 00:00:00 2001
From: Yan Zhulanow <yan.zhulanow@jetbrains.com>
Date: Wed, 13 Nov 2019 18:44:00 +0900
Subject: [PATCH] EA-217153: Add line count check

---
 .../idea/codeInsight/upDownMover/KotlinDeclarationMover.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/idea/src/org/jetbrains/kotlin/idea/codeInsight/upDownMover/KotlinDeclarationMover.java b/idea/src/org/jetbrains/kotlin/idea/codeInsight/upDownMover/KotlinDeclarationMover.java
index afd1e5849ed..498eae72b03 100644
--- a/idea/src/org/jetbrains/kotlin/idea/codeInsight/upDownMover/KotlinDeclarationMover.java
+++ b/idea/src/org/jetbrains/kotlin/idea/codeInsight/upDownMover/KotlinDeclarationMover.java
@@ -188,6 +188,11 @@ public class KotlinDeclarationMover extends AbstractKotlinUpDownMover {
             return new LineRange(startLine, endLine);
         }
 
+        int lineCount = doc.getLineCount();
+        if (oldRange.startLine >= lineCount || oldRange.endLine >= lineCount) {
+            return null;
+        }
+
         TextRange lineTextRange = new TextRange(doc.getLineStartOffset(oldRange.startLine),
                                                 doc.getLineEndOffset(oldRange.endLine));
         if (element instanceof KtDeclaration) {