[Bug preprocessor/79210] "internal compiler error: in get_substring_ranges_for_loc" processing -Wformat-signedness warning

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79210

--- Comment #10 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
For reference, after preprocessing, the format string is:
  "0423 lpfc_peer_port_login attribute cannot be set to %d, allowed range is
[0, 1]\n"
                                                        ^~
...showing where the underline would be, if it was a regular string without
macros.