1 files changed, 3 insertions, 0 deletions
diff --git a/apt-pkg/cdrom.cc b/apt-pkg/cdrom.cc
index ca74aa685..c067cf1ee 100644
--- a/apt-pkg/cdrom.cc
+++ b/apt-pkg/cdrom.cc
@@ -422,6 +422,9 @@ bool pkgCdrom::WriteSourceList(string Name,vector<string> &List,bool Source)
    {      
       F.getline(Buffer,sizeof(Buffer));
       CurLine++;
+      if (F.fail() && !F.eof())
+	 return _error->Error(_("Line %u too long in source list %s."),
+			      CurLine,File.c_str());
       _strtabexpand(Buffer,sizeof(Buffer));
       _strstrip(Buffer);