rb_reg_last_match  669 include/ruby/intern.h VALUE rb_reg_last_match(VALUE);
rb_reg_last_match 1722 re.c               return rb_reg_last_match(rb_backref_get());
rb_reg_last_match 2018 re.c               VALUE str = rb_reg_last_match(match);
rb_reg_last_match  355 vm_insnhelper.c 		val = rb_reg_last_match(backref);