https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79210
--- Comment #11 from David Malcolm <dmalcolm at gcc dot gnu.org> --- In theory we could fix the location of the stringified token; perhaps it could use the location of the arg. But cpp_interpret_string_ranges calls cpp_interpret_string_1 which expects the strings it re-lexes to have opening quotes, which isn't going to be the case for a stringified arg; we would have to somehow flag the token as being from stringization, and to interpret it differently so that it doesn't expect quotes. This seems invasive and error-prone, so I think the lowest-risk fix is likely to be to convert the failing assertion to an error-handling conditional, rather than to attempt to fixup the locations.
