Main.cc: In function 'int main()': Main.cc:17:29: internal compiler error: in gimplify_init_constructor, at gimplify.c:4271 struct chengji stu[20]={}; ^ Please submit a full bug report, with preprocessed source if appropriate. See for instructions. Preprocessed source stored into /tmp/cc6u5U1n.out file, please attach this to your bugreport.