# ISeq#to\_a hides internal\_id

**URL:** <https://www.ruby-forum.com/t/iseq-to-a-hides-internal-id/141330>\
**Category:** Development\
**Created:** [June 24, 2008, 6:41pm UTC](https://www.ruby-forum.com/t/iseq-to-a-hides-internal-id/141330 "2008-06-24T18:41:56Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Yusuke\_ENDOH](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/c89c15/32.png) [@Yusuke\_ENDOH](https://www.ruby-forum.com/u/Yusuke_ENDOH)\
**Post date:** [June 24, 2008, 6:41pm UTC](https://www.ruby-forum.com/t/iseq-to-a-hides-internal-id/141330/1 "2008-06-24T18:41:56Z")

</div>

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e$B$G=PNOe(B  
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e$B$9$k$HJQ$J$3$H$K$J$j$^$9!#e(B

$ ./ruby -e ’  
VM::InstructionSequence.load(  
VM::InstructionSequence.compile(  
“for i in [1, 2, 3]; p i; end”  
).to\_a  
).eval  
’  
-605544602  
-605544602  
-605544602

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internal\_id e$B$O%P%$%H%3!\<%I\>e$Ge(B nil  
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# Index: iseq.c

— iseq.c (revision 17564)  
+++ iseq.c (working copy)  
@@ -1034,11 +1034,11 @@  
/\* locals \*/  
for (i=0; ilocal\_table\_size; i++) {  
ID lid = iseq-\>local\_table[i];

- if (lid) {
- 

```
 if (rb_id2str(lid)) rb_ary_push(locals, ID2SYM(lid));

```

- if (lid && rb\_id2str(lid)) {
- 

```
 rb_ary_push(locals, ID2SYM(lid));

```

}  
else {

- 

```
 rb_ary_push(locals, ID2SYM(rb_intern("#arg_rest")));

```

- 

```
 rb_ary_push(locals, Qnil);

```

}  
}

@@ -1299,8 +1299,11 @@  
rb\_define\_method(rb\_cISeq, “eval”, iseq\_eval, 0);

```
 /* disable this feature because there is no verifier. */

```

- /\* rb\_define\_singleton\_method(rb\_cISeq, “load”, iseq\_s\_load, -1);  
\*/  
+#ifdef ANGEROUS\_ISEQ\_LOAD

- rb\_define\_singleton\_method(rb\_cISeq, “load”, iseq\_s\_load, -1);  
+#else  
(void)iseq\_s\_load;  
+#endif

- tbl[i] = FIXNUM\_P(lv) ? FIX2INT(lv) : SYM2ID(CHECK\_SYMBOL(lv));

- tbl[i] = NIL\_P(lv) ? 0 : SYM2ID(CHECK\_SYMBOL(lv));  
}