c-lex.c (fe_file_change): Handle a NULL new_map.

	* c-lex.c (fe_file_change):  Handle a NULL new_map.
	* fix-header.c (cb_file_change):  Likewise.
	* c-ppoutput.c (pp_file_change):  Likewise.

From-SVN: r72011

gcc/ChangeLog

@@ -5,6 +5,10 @@
 	(get_non_padding_token):  We no longer need to compensate for the
 	"horrible things" the C++ front-end does with the current line number,
 
+	* c-lex.c (fe_file_change):  Handle a NULL new_map.
+	* fix-header.c (cb_file_change):  Likewise.
+	* c-ppoutput.c (pp_file_change):  Likewise.
+
 2003-10-01  Zack Weinberg  <zack@codesourcery.com>
 
 	* target.h (init_libfuncs): New hook.

gcc/c-lex.c

@@ -212,6 +212,12 @@ cb_dir_change (cpp_reader *pfile ATTRIBUTE_UNUSED, const char *dir)
 void
 fe_file_change (const struct line_map *new_map)
 {
+  if (new_map == NULL)
+    {
+      map = NULL;
+      return;
+    }
+
   if (new_map->reason == LC_ENTER)
     {
       /* Don't stack the main buffer on the input stack;

gcc/c-ppoutput.c

@@ -346,6 +346,8 @@ pp_file_change (const struct line_map *map)
   if (flag_no_line_commands || flag_no_output)
     return;
 
+  if (map != NULL)
+    {
       /* First time?  */
       if (print.map == NULL)
 	{
@@ -365,6 +367,7 @@ pp_file_change (const struct line_map *map)
 	    flags = " 2";
 	  print_line (map, map->from_line, flags);
 	}
+    }
 
   print.map = map;
 }

gcc/fix-header.c

@@ -578,7 +578,7 @@ cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
 		const struct line_map *map)
 {
   /* Just keep track of current file name.  */
-  cur_file = map->to_file;
+  cur_file = map == NULL ? NULL : map->to_file;
 }
 
 static void