[Bug c/66088] -Wunused-but-set-variable does not regard static variable access in local scope

[vshebordaev at mail dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66088

--- Comment #3 from Vladimir <vshebordaev at mail dot ru> ---
Well, I doubt that modification of the static variable has no side effects.