https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70952
--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> --- Octal escapes have no more than three digits by definition, so "\0009" clearly doesn't fall under this warning. Upon further testing, there's no diagnostic for const char c = '\9'; /* same as ... = 9; */ Surely that's a bug? It is diagnosed (with a warning) inside of string literals.
