[Bug c++/71182] [6/7 Regression] parser.c cp_lexer_previous_token sanitizer detects member call on null pointer

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71182

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW

--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(gdb) l
763       cp_token_position tp = cp_lexer_previous_token_position (lexer);
764
765       /* Skip past purged tokens.  */
766       while (tp->purged_p)
767         {
768           gcc_assert (tp != lexer->buffer->address ());
769           tp--;
770         }
771
772       return cp_lexer_token_at (lexer, tp);
(gdb) p *lexer
$1 = {
  buffer = 0x0,
  last_token = 0x7ffff7e0c2f8,
  next_token = 0x7ffff7e0c298,
  saved_tokens = {
    m_vec = 0x92c6b20
  },
  next = 0x7ffff5f96480,
  debugging_p = false,
  in_pragma = false
}