From 9658b01431cd7ff6344d7787f855179e73fe81a7 Mon Sep 17 00:00:00 2001

From: Leon Bottou <leon@bottou.org>

Date: Mon, 8 Apr 2019 22:55:38 -0400

Subject: fix bug #298

diff --git a/libdjvu/GBitmap.h b/libdjvu/GBitmap.h

index e8e0c9b..ca89a19 100644

--- a/libdjvu/GBitmap.h

+++ b/libdjvu/GBitmap.h

@@ -566,7 +566,7 @@ GBitmap::operator[](int row)

 {

   if (!bytes) 

     uncompress();

-  if (row<0 || row>=nrows) {

+  if (row<0 || row>=nrows || !bytes) {

 #ifndef NDEBUG

     if (zerosize < bytes_per_row + border)

       G_THROW( ERR_MSG("GBitmap.zero_small") );

@@ -581,7 +581,7 @@ GBitmap::operator[](int row) const

 {

   if (!bytes) 

     ((GBitmap*)this)->uncompress();

-  if (row<0 || row>=nrows) {

+  if (row<0 || row>=nrows || !bytes) {

 #ifndef NDEBUG

     if (zerosize < bytes_per_row + border)

       G_THROW( ERR_MSG("GBitmap.zero_small") );