https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68737
--- Comment #10 from dave.anglin at bell dot net --- On 2018-09-04 4:51 AM, redi at gcc dot gnu.org wrote: > The code assumes __convert_from_v always returns a valid length, but it seems > to be failing and returning -1. vsnprintf/snprintf can return a negative value if an error occurs.
