From c9c292982dba022f3e481a9630c398e81db87d78 Mon Sep 17 00:00:00 2001
From: Jonah Graham <jonah@kichwacoders.com>
Date: Tue, 14 Nov 2017 22:58:21 +0000
Subject: [PATCH] Bug 519533: Fix scroll lock on build console

Change-Id: Ib7826de6ed26dbd05f2568d097deb52cf3dc4768
---
 .../cdt/internal/ui/buildconsole/BuildConsolePartitioner.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/buildconsole/BuildConsolePartitioner.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/buildconsole/BuildConsolePartitioner.java
index 57ba6e1321a..8726c5cc496 100644
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/buildconsole/BuildConsolePartitioner.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/buildconsole/BuildConsolePartitioner.java
@@ -266,7 +266,9 @@ public class BuildConsolePartitioner
 			// to avoid document becoming 0 length and therefore the
 			// listeners assume the document has been cleared
 			fDocument.replace(length + toTrim, 0, appendContents);
-			fDocument.replace(0, toTrim, ""); //$NON-NLS-1$
+			if (toTrim > 0) {
+				fDocument.replace(0, toTrim, ""); //$NON-NLS-1$
+			}
 		} catch (BadLocationException e) {
 			fDocument.set(update.getNewContents());
 		}