[Vala] unused variable warning in generated C code

[Nicolas CARRIER <nicolas carrier parrot com>]

Hello,
When I compile the following code :

public static int main(string[] args) {
        int[] b = { 2, 4, 6, 8 };
        foreach (int a in b)
                stdout.printf("%d\n", a);
        return 0;
}

with :

$ valac -C main.vala
$ gcc -Wunused-variable main.c -o main $(pkg-config --cflags --libs glib-2.0)


I get the following warning :
main.c: In function ‘_vala_main’:
main.c:38:8: attention : unused variable ‘_a_collection_size_’ [-Wunused-variable]
   gint _a_collection_size_ = 0;
        ^
What is the reason for this warning ?
Is it possible to get rid of it ?


PS: valac --version gives Vala 0.26.1.

Thank you