From 145ea9698f5e3488e6c7cbd684e6637f09e56d6f Mon Sep 17 00:00:00 2001
From: Martin Tirion <mtirion@microsoft.com>
Date: Thu, 2 Nov 2023 17:16:12 +0100
Subject: [PATCH 1/2] Added exception handling of hard to trace error

---
 .../DocLinkChecker/Helpers/MarkdownHelper.cs  | 27 ++++++++++++++-----
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/src/DocLinkChecker/DocLinkChecker/Helpers/MarkdownHelper.cs b/src/DocLinkChecker/DocLinkChecker/Helpers/MarkdownHelper.cs
index 6182451..9dfdd16 100644
--- a/src/DocLinkChecker/DocLinkChecker/Helpers/MarkdownHelper.cs
+++ b/src/DocLinkChecker/DocLinkChecker/Helpers/MarkdownHelper.cs
@@ -1,6 +1,7 @@
 namespace DocLinkChecker.Helpers
 {
     using System;
+    using System.Collections;
     using System.Collections.Generic;
     using System.Diagnostics;
     using System.IO;
@@ -220,17 +221,29 @@ private static (PipeTable table, List<MarkdownError> errors)
         private static (PipeTable table, List<MarkdownError> errors)
             ValidatePipeTableWithText(string markdownFilePath, string markdown, Table table)
         {
-            PipeTable pipeTable = new (markdownFilePath, table.Line, table.Column);
+            PipeTable pipeTable = null;
+            int start = 0;
+            int len = 0;
+            string line = string.Empty;
             List<MarkdownError> errors = new ();
 
-            int start = table.Span.Start;
-            while (start > 0 && markdown.Substring(start, 1) != "\n")
+            try
             {
-                start--;
-            }
+                pipeTable = new (markdownFilePath, table.Line, table.Column);
+
+                start = Math.Max(table.Span.Start, 0);
+                while (start > 0 && markdown.Substring(start, 1) != "\n")
+                {
+                    start--;
+                }
 
-            int len = markdown.IndexOf('\r', start) - start;
-            string line = markdown.Substring(start, len);
+                len = markdown.IndexOf('\r', start) - start;
+                line = markdown.Substring(start, len);
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"PipeTable error {ex.Message}.\nfilepath: {markdownFilePath}\nmarkdown: {markdown.Substring(0, 40)}...\nTable: line={table.Line} col={table.Column} start={table.Span.Start}");
+            }
 
             int row = 0;
             int nrCols = -1;

From 1d1474ceed1a7ab649f7df1a7213fca6c2a017ed Mon Sep 17 00:00:00 2001
From: Martin Tirion <mtirion@microsoft.com>
Date: Thu, 2 Nov 2023 17:19:36 +0100
Subject: [PATCH 2/2] Fixed resource validation output (wrong path fixed)

---
 .../DocLinkChecker/Services/ResourceValidatorService.cs         | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/DocLinkChecker/DocLinkChecker/Services/ResourceValidatorService.cs b/src/DocLinkChecker/DocLinkChecker/Services/ResourceValidatorService.cs
index a1971db..5c6413e 100644
--- a/src/DocLinkChecker/DocLinkChecker/Services/ResourceValidatorService.cs
+++ b/src/DocLinkChecker/DocLinkChecker/Services/ResourceValidatorService.cs
@@ -71,7 +71,7 @@ public ResourceValidatorService(
                         orphanedResources.Add(resourceFullPath);
                         errors.Add(
                             new MarkdownError(
-                                _fileService.GetRelativePath(resourceFullPath, _config.DocumentationFiles.SourceFolder),
+                                _fileService.GetRelativePath(_config.DocumentationFiles.SourceFolder, resourceFullPath),
                                 0,
                                 0,
                                 MarkdownErrorSeverity.Error,