ref: e661871dd3e996607e7444be1e0ca86be0a8565f
dir: /tests/cc/execute/0138-namespace.c/
typedef struct s s; struct s { struct s1 { int s; struct s2 { int s; } s1; } s; } s2; #define s s int main(void) { #undef s goto s; struct s s; { int s; return s; } return s.s.s + s.s.s1.s; s: { return 0; } return 1; }