2009-12-20 Brian Szymanski <skibrianski via Savannah>

        * src/files.c (write_file): Check stat struct exists, and if not use just obtained stat data.    
          Fixes Ubuntu bug 471568, "reproducible crash in nano on trying to save to a file 
          different than the one specified on the command line".



git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4467 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

+2009-12-20 Brian Szymanski <skibrianski via Savannah>
+	* src/files.c (write_file): Check stat struct exists, and if not use just obtained stat data.
+	  Fixes Ubuntu bug 471568, "reproducible crash in nano on trying to save to a file 
+	  different than the one specified on the command line".
+
 2009-12-15 Chris Allegretta <chrisa@asty.org>
 	* doc/nanorc.sample.in - Remove erroneous 'set suspendenable' as it's actually a 
 	  key binding (e.g. 'bind M-Z suspendenable all') and not a settable flag.  Fixes

src/files.c

@@ -1499,6 +1499,13 @@ bool write_file(const char *name, FILE *f_open, bool tmp, append_type
      * one). */
     realexists = (stat(realname, &st) != -1);
 
+    /* if we have not stat()d this file before (say, the user just
+     * specified it interactively), use the info we just got from
+     * stat()ing or else we will chase null pointers when we do
+     * modtime checks, preserve file times, etc. during backup */
+    if(openfile->current_stat == NULL)
+	openfile->current_stat = &st;
+
 #ifndef NANO_TINY
     /* We backup only if the backup toggle is set, the file isn't
      * temporary, and the file already exists.  Furthermore, if we