False positive for "variable is never modified" for a struct instance modified via __traits(getMember)

[andrej-petrovic]

void main()
{
    struct S { int i; }

    S s;

    __traits(getMember, s, "x") = 88;
}

D-Scanner reports:

./source/app.d(5:7)[warn]: Variable s is never modified and could have been declared const or immutable.