From 0d0c8bf3b35d588f4a0fed9c7f938f7449fd034e Mon Sep 17 00:00:00 2001
From: GreyMerlin <GreyMerlin@gmail.com>
Date: Thu, 2 Aug 2018 15:10:34 -0700
Subject: [PATCH] Last Line of Files vs "Ghost Lines" (3)

`LineInfo::Delete()` was not correctly handling the case of deleting
all text in a line _including_ the CRLF at the end.  This particular
situation exists because of deleting text at the very end of a file.
---
 Externals/crystaledit/editlib/LineInfo.cpp | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/Externals/crystaledit/editlib/LineInfo.cpp b/Externals/crystaledit/editlib/LineInfo.cpp
index 620c9475a..b3ea2fe61 100644
--- a/Externals/crystaledit/editlib/LineInfo.cpp
+++ b/Externals/crystaledit/editlib/LineInfo.cpp
@@ -219,7 +219,19 @@ void LineInfo::Delete(size_t nStartChar, size_t nEndChar)
       memcpy (m_pcLine + nStartChar, m_pcLine + nEndChar,
               sizeof (TCHAR) * (FullLength() - nEndChar));
     }
-  m_nLength -= (nEndChar - nStartChar);
+  size_t nDelete = (nEndChar - nStartChar);
+  if (nDelete <= m_nLength)
+  {
+	  m_nLength -= nDelete;
+  }
+  else
+  {
+	  ASSERT( (m_nLength + m_nEolChars) <= nDelete );
+	  nDelete -= m_nLength;
+	  m_nLength = 0;
+	  m_nEolChars -= static_cast<int>(nDelete);
+  }
+  ASSERT (m_nLength <= INT_MAX);		// assert "positive int"
   if (m_pcLine)
     m_pcLine[FullLength()] = '\0';
 }
-- 
2.11.0