https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69650
--- Comment #53 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Hmm. Something got reallocated perhaps? It's not entirely obvious to me where
that would happen. Does the following help at all?
Index: directives.c
===================================================================
--- directives.c (revision 234831)
+++ directives.c (working copy)
@@ -977,6 +977,8 @@ do_linemarker (cpp_reader *pfile)
{
struct line_maps *line_table = pfile->line_table;
const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP (line_table);
+ bool main_file_p = MAIN_FILE_P (map);
+ const line_map_ordinary *from = INCLUDED_FROM (pfile->line_table, map);
const cpp_token *token;
const char *new_file = ORDINARY_MAP_FILE_NAME (map);
linenum_type new_lineno;
@@ -1048,10 +1050,9 @@ do_linemarker (cpp_reader *pfile)
if (reason == LC_LEAVE)
{
- const line_map_ordinary *from;
- if (MAIN_FILE_P (map)
+ if (main_file_p
|| (new_file
- && (from = INCLUDED_FROM (pfile->line_table, map)) != NULL
+ && from != NULL
&& filename_cmp (ORDINARY_MAP_FILE_NAME (from), new_file) != 0))
{
cpp_warning (pfile, CPP_W_NONE,
