[Bug c/78498] [7 Regression] valgrind conditional jump or move depends on uninitialised value(s) in format_type_warning

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78498

--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Seems to resemble:
  http://austingroupbugs.net/view.php?id=1019
   "0001019: strndup shouldn't require source array to be null-terminated"