Only reset missed attempts count if table is found in CrossReferenceParser.Parse() and fix #1047

src/UglyToad.PdfPig.Tests/Integration/GithubIssuesTests.cs

@@ -7,6 +7,15 @@
 
     public class GithubIssuesTests
     {
+        [Fact]
+        public void Issue1047()
+        {
+            var path = IntegrationHelpers.GetSpecificTestDocumentPath("Hang.pdf");
+
+            var ex = Assert.Throws<PdfDocumentFormatException>(() => PdfDocument.Open(path, new ParsingOptions() { UseLenientParsing = true }));
+            Assert.Equal("The cross reference was not found.", ex.Message);
+        }
+
         [Fact]
         public void Issue1048()
         {

src/UglyToad.PdfPig/Parser/FileStructure/CrossReferenceParser.cs

@@ -10,7 +10,7 @@
     using Tokenization.Scanner;
     using Tokens;
 
-    internal class CrossReferenceParser
+    internal sealed class CrossReferenceParser
     {
         private readonly ILog log;
         private readonly XrefOffsetValidator offsetValidator;
@@ -151,8 +151,6 @@
                 {
                     log.Debug("Element was cross reference stream.");
 
-                    missedAttempts = 0;
-
                     // Unread the numeric token.
                     tokenScanner.Seek(previousCrossReferenceLocation);
 
@@ -169,6 +167,8 @@
                         continue;
                     }
 
+                    missedAttempts = 0;
+
                     table.Add(tablePart);
 
                     previousCrossReferenceLocation = tablePart.Previous;