ref: a8cd756a8912fe2a544d67110ecbdb28a343bc95
dir: /tests/cc/execute/0044-struct.c/
struct s { int x; struct { int y; int z; } nest; }; int main() { struct s v; v.x = 1; v.nest.y = 2; v.nest.z = 3; if (v.x + v.nest.y + v.nest.z != 6) return 1; return 0; }