Arrays and scalars cannot be mixed

    This is because the preprocessor does not realise that the local array takes precedence over the scalar.

    int main() {
      init_grid (64);
      scalar s[], p[];
        s[] = p[] = 1.;
      foreach() {
    variable ā€˜pā€™ set but not used [-Wunused-but-set-variable]
        double p[3]; // renaming p to something else fixes the problem
        for (int i = 0; i < 2; i++)
          p[i] = s[];