On Thu, Jul 19 2018, Jeff King wrote:

Since this use of strncpy was verified by manual inspection
and since it doesn't trigger the automated ban-list, we're
better off leaving it to keep our divergence from glibc
minimal.

FWIW it's s/glibc/gawk/. It's originally from glibc, but gawk
perma-forked it long ago, and an ancient copy of thath is the one we
use.