From 1dc588ab2fede3f4eded8e8e82335fdeee54b113 Mon Sep 17 00:00:00 2001
From: "smontagu%netscape.com"
 <smontagu%netscape.com@18797224-902f-48f8-a5cc-f745e15eee43>
Date: Fri, 16 Nov 2001 03:08:30 +0000
Subject: [PATCH] Fix crash when scrolling absolute positioned textarea by
 adding test to return value from |GetLine|. Bug 105004, r=rbs, sr=kin

git-svn-id: svn://10.0.0.236/trunk@108261 18797224-902f-48f8-a5cc-f745e15eee43
---
 mozilla/layout/generic/nsFrame.cpp       | 2 ++
 mozilla/layout/html/base/src/nsFrame.cpp | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/mozilla/layout/generic/nsFrame.cpp b/mozilla/layout/generic/nsFrame.cpp
index e139a285b02..b431c588082 100644
--- a/mozilla/layout/generic/nsFrame.cpp
+++ b/mozilla/layout/generic/nsFrame.cpp
@@ -3737,6 +3737,8 @@ nsFrame::GetFrameFromDirection(nsIPresContext* aPresContext, nsPeekOffsetStruct
                            &lineFlags);
       if (NS_FAILED(result))
         return result;
+      if (!firstFrame)
+        return NS_ERROR_FAILURE;
 
       lastFrame = firstFrame;
       for (;lineFrameCount > 1;lineFrameCount --){
diff --git a/mozilla/layout/html/base/src/nsFrame.cpp b/mozilla/layout/html/base/src/nsFrame.cpp
index e139a285b02..b431c588082 100644
--- a/mozilla/layout/html/base/src/nsFrame.cpp
+++ b/mozilla/layout/html/base/src/nsFrame.cpp
@@ -3737,6 +3737,8 @@ nsFrame::GetFrameFromDirection(nsIPresContext* aPresContext, nsPeekOffsetStruct
                            &lineFlags);
       if (NS_FAILED(result))
         return result;
+      if (!firstFrame)
+        return NS_ERROR_FAILURE;
 
       lastFrame = firstFrame;
       for (;lineFrameCount > 1;lineFrameCount --){