[Bug libstdc++/68737] FAIL: 22_locale/num_put/put/char/14220.cc execution test

[dave.anglin at bell dot net]

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.