[Bug c++/70735] New: problem combining std::function, generic lambdas and static variables

[paolo.monteverde at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70735

            Bug ID: 70735
           Summary: problem combining std::function, generic lambdas and
                    static variables
           Product: gcc
           Version: 5.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: paolo.monteverde at gmail dot com
  Target Milestone: ---

The code


#include <iostream>
#include <functional>

int main()
{
        static int a;
        std::function<void(int)> f = [](auto) { std::cout << a << '\n'; };
        a = 1;
        f(0);
}


prints "0" instead of "1". Compiled with "g++ -std=c++14"; verified on Arch and
Ubuntu with GCC 5.3.0. Though, using coliru, it works well:
http://coliru.stacked-crooked.com/a/abff4a693ebcaf86