next_argv        2924 io.c               if (!next_argv()) return Qnil;
next_argv        2977 io.c               if (!next_argv()) return Qnil;
next_argv        3539 io.c               if (!next_argv()) {
next_argv        3555 io.c               if (!next_argv()) {
next_argv        3569 io.c               if (!next_argv()) {
next_argv        3582 io.c               if (!next_argv()) {
next_argv        3594 io.c               if (!next_argv()) {
next_argv        3621 io.c               if (!next_argv()) return str;
next_argv        3655 io.c               if (!next_argv()) return Qnil;
next_argv        3685 io.c               if (!next_argv()) return Qtrue;
next_argv        3726 io.c               next_argv();
next_argv        3733 io.c               next_argv();
next_argv        3741 io.c               next_argv();