[Bug preprocessor/112956] Valgrind errors on pr88974.c

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112956

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
--- libcpp/lex.cc.jj    2023-12-11 12:39:23.353442196 +0100
+++ libcpp/lex.cc       2023-12-12 13:15:07.154019695 +0100
@@ -3809,7 +3809,7 @@ _cpp_get_fresh_line (cpp_reader *pfile)
 cpp_token *
 _cpp_lex_direct (cpp_reader *pfile)
 {
-  cppchar_t c;
+  cppchar_t c = 0;
   cpp_buffer *buffer;
   const unsigned char *comment_start;
   bool fallthrough_comment = false;
@@ -3833,6 +3833,7 @@ _cpp_lex_direct (cpp_reader *pfile)
          pfile->state.in_deferred_pragma = false;
          if (!pfile->state.pragma_allow_expansion)
            pfile->state.prevent_expansion--;
+         result->src_loc = pfile->line_table->highest_line;
          return result;
        }
       if (!_cpp_get_fresh_line (pfile))
@@ -3849,6 +3850,8 @@ _cpp_lex_direct (cpp_reader *pfile)
              /* Now pop the buffer that _cpp_get_fresh_line did not.  */
              _cpp_pop_buffer (pfile);
            }
+         else if (c == 0)
+           result->src_loc = pfile->line_table->highest_line;
          return result;
        }
       if (buffer != pfile->buffer)
seems to work though (at least in quick cpp.exp testing).