rb_iseq_disasm_insn 1571 iseq.c         	n += rb_iseq_disasm_insn(str, code, n, iseq, child);
rb_iseq_disasm_insn  829 vm_core.h      int rb_iseq_disasm_insn(VALUE str, const VALUE *iseqval, size_t pos, const rb_iseq_t *iseq, VALUE child);
rb_iseq_disasm_insn  370 vm_dump.c      	    rb_iseq_disasm_insn(0, iseq_original, (size_t)pc, iseq, 0);