Bad parsing of embedded macros expected token ; got {

The code below displays the "int i;" line with a red underlining, due to parsing error "Bad parsing of embedded macros expected token ; got {"

#define M2(cond, ...) \
  if (true)


#define M1(cond, ...)\
  M2(cond) {}

    void f()
    {
      M1(true, "njk") ;
      int i;
    }