[Bug preprocessor/78324] Valgrind issues seen with gcc.dg/tree-ssa/builtin-sprintf-2.c

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78324

--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch:
  https://gcc.gnu.org/ml/gcc-patches/2016-11/msg01942.html