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
2001-11-16 03:08:30 +00:00
parent 70829fcf48
commit 1dc588ab2f
2 changed files with 4 additions and 0 deletions
--- 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 --){
--- 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 --){