https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77672
--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> --- BTW, if you do have a need to send a "print the whole string" request via class substring_loc, that could be handled by passing in INT_MAX as the idx values, which will lead to a failure. (we could make it handle -1 similarly, but input.c:get_source_location_for_substring currently only checks the upper bound; it doesn't yet check > 0, but that would be trivial).
