False positive: [functionStatic] variadic template

[Andreas Grob]

struct A {
    int a = 0;
    template <typename... Args> void call(const Args &... args) { a = 1; }
    template <typename T, typename... Args> auto call(const Args &... args) -> T {
        a = 2;
        return T{};
    }
};

struct B : public A {
    void test() {
        call();
        call<int>(1, 2, 3);
    }
};

int main() {
    B b;
    b.test();
}

cppcheck: commit 62702a6
built with: make MATCHCOMPILER=yes FILESDIR=/usr/share/cppcheck HAVE_RULES=yes

$ cppcheck --enable=all --inconclusive main.cpp
Checking main.cpp ...
main.cpp:11:10: performance:inconclusive: Technically the member function 'B::test' can be static (but you may consider moving to unnamed namespace). [functionStatic]                        
    void test() {
         ^

This might be the same issue as with False positive: [unusedFunction] variadic template, but I can't be sure, so I am posting both.

[Daniel Marjamäki]

Thanks! I created a ticket: https://trac.cppcheck.net/ticket/9806