Merge pull request #148 from juniorschroder/master

fix: fix negative index error on RemoveUnusedNode when open pdf with …
VahidN · Jul 24, 2024 · 5618985 · 5618985
2 parents 03cf227 + 7b84b45
commit 5618985
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/src/iTextSharp.LGPLv2.Core/iTextSharp/text/pdf/PdfReader.cs b/src/iTextSharp.LGPLv2.Core/iTextSharp/text/pdf/PdfReader.cs
@@ -4142,7 +4142,7 @@ protected internal void RemoveUnusedNode(PdfObject obj, bool[] hits)
                         var refi = (PrIndirectReference)obj;
                         var num = refi.Number;
 
-                        if (!hits[num])
+                        if (num > 0 && !hits[num])
                         {
                             hits[num] = true;
                             state.Push(GetPdfObjectRelease(refi));
@@ -4180,7 +4180,7 @@ protected internal void RemoveUnusedNode(PdfObject obj, bool[] hits)
                     {
                         var num = ((PrIndirectReference)v).Number;
 
-                        if (num >= _xrefObj.Count || (!_partial && _xrefObj[num] == null))
+                        if (num > 0 && (num >= _xrefObj.Count || (!_partial && _xrefObj[num] == null)))
                         {
                             ar[k] = PdfNull.Pdfnull;
 
@@ -4217,7 +4217,7 @@ protected internal void RemoveUnusedNode(PdfObject obj, bool[] hits)
                     {
                         var num = ((PrIndirectReference)v).Number;
 
-                        if (num >= _xrefObj.Count || (!_partial && _xrefObj[num] == null))
+                        if (num > 0 && (num >= _xrefObj.Count || (!_partial && _xrefObj[num] == null)))
                         {
                             dic.Put(key, PdfNull.Pdfnull);