[Bug tree-optimization/79376] wrong lower bound with %s and non-constant strings in -Wformat-overflow

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79376

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch submitted for review:
https://gcc.gnu.org/ml/gcc-patches/2017-02/msg00348.html