rb_alias_variable  931 include/ruby/intern.h void rb_alias_variable(ID, ID);
rb_alias_variable 1185 load.c             rb_alias_variable(rb_intern("$-I"), id_load_path);
rb_alias_variable 1186 load.c             rb_alias_variable(rb_intern("$LOAD_PATH"), id_load_path);
rb_alias_variable 2504 vm.c           	rb_alias_variable(SYM2ID(sym1), SYM2ID(sym2));