# Jump in rescue clause in eval dumps core

**URL:** <https://www.ruby-forum.com/t/jump-in-rescue-clause-in-eval-dumps-core/111767>\
**Category:** Development\
**Created:** [August 10, 2007, 5:02pm UTC](https://www.ruby-forum.com/t/jump-in-rescue-clause-in-eval-dumps-core/111767 "2007-08-10T17:02:56Z")\
**Posts on this page:** 4\
**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:** [August 10, 2007, 5:02pm UTC](https://www.ruby-forum.com/t/jump-in-rescue-clause-in-eval-dumps-core/111767/1 "2007-08-10T17:02:56Z")

</div>

e$B1sF#$H?=$7$^$9!#e(B

1.9 e$B$G8eCVe(B rescue e$B@a$NCf$Ge(B break e$B$de(B next e$B$de(B redo  
e$B$r$9$k%3!\<%I$re(B  
eval e$B$9$k$HMn$A$^$9!#e(B

## $ ./ruby -ve ‘eval “0 rescue break”’ ruby 1.9.0 (2007-08-10 patchlevel 0) [i686-linux] -e:1: – control frame ---------- c:0004 p:---- s:0009 b:0009 l:000008 d:000008 CFUNC :eval c:0003 p:0009 s:0005 b:0005 l:000004 d:000004 TOP -e:1 c:0002 p:---- s:0003 b:0003 l:000002 d:000002 FINISH :inherited c:0001 p:---- s:0001 b:-001 l:000000 d:000000 ------

## DBG\> : “-e:1:in `’” – backtrace of native function call (Use addr2line) – 0x80dac55 0x80f4093 0x80f415b 0x80b2250 0xffffe420 0x8104206 0x810b14c 0x80cf0f2 0x81028ae 0x81051fd 0x810b11e 0x80cf0f2 0x80cf6c7 0x80cf7f8 0x805b69d 0x805bb15 0x80d156e 0x80d3269 0x80d5de5 0x80d9554 0x80d988b 0x8059229 0x805d79d 0x8056df2 0xb7d6dea8 0x8056d21

[BUG] Segmentation fault  
ruby 1.9.0 (2007-08-10) [i686-linux]

e$B%"%!\<%H$7$^$7$?e(B (core dumped)

## $ ./ruby -ve ‘eval “0 rescue next”’ ruby 1.9.0 (2007-08-10 patchlevel 0) [i686-linux] -e:1: – control frame ---------- c:0004 p:---- s:0009 b:0009 l:000008 d:000008 CFUNC :eval c:0003 p:0009 s:0005 b:0005 l:000004 d:000004 TOP -e:1 c:0002 p:---- s:0003 b:0003 l:000002 d:000002 FINISH :inherited c:0001 p:---- s:0001 b:-001 l:000000 d:000000 ------

DBG\> : “-e:1:in `’”  
– backtrace of native function call (Use addr2line) –  
0x80dac55

(snip)

## 0x8056d21

[BUG] Segmentation fault  
ruby 1.9.0 (2007-08-10) [i686-linux]

e$B%"%!\<%H$7$^$7$?e(B (core dumped)

## $ ./ruby -ve ‘eval “0 rescue redo”’ ruby 1.9.0 (2007-08-10 patchlevel 0) [i686-linux] -e:1: – control frame ---------- c:0004 p:---- s:0009 b:0009 l:000008 d:000008 CFUNC :eval c:0003 p:0009 s:0005 b:0005 l:000004 d:000004 TOP -e:1 c:0002 p:---- s:0003 b:0003 l:000002 d:000002 FINISH :inherited c:0001 p:---- s:0001 b:-001 l:000000 d:000000 ------

DBG\> : “-e:1:in `’”  
– backtrace of native function call (Use addr2line) –  
0x80dac55

(snip)

## 0x8056d21

[BUG] Segmentation fault  
ruby 1.9.0 (2007-08-10) [i686-linux]

e$B%"%!\<%H$7$^$7$?e(B (core dumped)

NODE\_BREAK e$B$de(B NODE\_NEXT e$B$de(B NODE\_REDO e$B$N%3%s%Q%$%k$Ge(B  
parent\_iseq e$B$re(B  
e$B$?$I$k$H$-!"e(Biseq e$B$,e(B ISEQ\_TYPE\_EVAL  
e$B$+$I$&$+$N%A%’%C%/$,$J$+$C$?$j!“e(B  
COMPILE\_ERROR e$B$,e(B while e$B$NCf$K$”$k$;$$$Ge(B while  
e$BD\>8e$NM\>7W$J%3!\<%I$,e(B  
e$B\<B9T$5$l$F$$$?$j$9$k$?$a$N$h$&$G$9!#e(B

# e$B:#8e8e\<T$N$h$&$J%\_%9$rKI$0$?$a$K!"e(BCOMPILE\_ERROR e$B%^%/%m$Ne(B

break e$B$re(B

# goto e$B$KJQ$($F$\*$/$N$b\<j$+$b!)e(B

# Index: compile.c

— compile.c (revision 12914)  
+++ compile.c (working copy)  
@@ -2903,9 +2903,14 @@  
}  
else {  
rb\_iseq\_t \*ip = iseq-\>parent\_iseq;

- 

```
 int error_type_eval = 0;
 while (ip) {

```

level++;

- if (ip-\>compile\_data-\>redo\_label != 0) {

- if (ip-\>type == ISEQ\_TYPE\_EVAL) {
- 

```
   error_type_eval = 1;

```

- 

```
   break;

```

- }
- else if (ip-\>compile\_data-\>redo\_label != 0) {  
level = 0x8000;  
if (ip-\>compile\_data-\>loopval\_popped == 0) {  
/\* need value \*/  
@@ -2919,7 +2924,12 @@  
}  
ip = ip-\>parent\_iseq;  
}

- 

```
 COMPILE_ERROR((ERROR_ARGS "Illegal break"));

```

- 

```
 if (error_type_eval) {

```

- COMPILE\_ERROR((ERROR\_ARGS “Can’t escape from eval with break”));
- 

```
 }

```

- 

```
 else {

```

- COMPILE\_ERROR((ERROR\_ARGS “Illegal break”));
- 

```
 }

```

}  
break;  
}  
@@ -2942,18 +2952,26 @@  
}  
else {  
rb\_iseq\_t \*ip = iseq-\>parent\_iseq;
- 

```
 int error_type_eval = 0;
 while (ip) {

```

level = 0x8000;  
if (ip-\>type == ISEQ\_TYPE\_BLOCK) {  
level |= 0x4000;  
break;  
}
- else if (ip-\>type == ISEQ\_TYPE\_EVAL) {
- 

```
   error_type_eval = 1;

```

- 

```
   break;

```

- }  
else if (ip-\>compile\_data-\>redo\_label != 0) {  
break;  
}  
ip = ip-\>parent\_iseq;  
}

- 

```
 if (ip != 0) {

```

- 

```
 if (error_type_eval) {

```

- COMPILE\_ERROR((ERROR\_ARGS “Can’t escape from eval with next”));
- 

```
 }

```

- 

```
 else if (ip != 0) {

```

COMPILE(ret, “next val”, node-\>nd\_stts);  
add\_ensure\_iseq(ret, iseq);  
ADD\_INSN1(ret, nd\_line(node), throw,  
@@ -2987,19 +3005,24 @@  
else {  
rb\_iseq\_t \*ip = iseq-\>parent\_iseq;  
unsigned long level = 0x8000 | 0x4000;
- 

```
 int error_type_eval = 0;
 while (ip) {

```

if (ip-\>type == ISEQ\_TYPE\_BLOCK) {  
break;  
}  
else if (ip-\>type == ISEQ\_TYPE\_EVAL) {

- 

```
   COMPILE_ERROR((ERROR_ARGS "Can't escape from eval with redo"));

```

- 

```
   error_type_eval = 1;

```

- 

```
   break;

```

}  
else if (ip-\>compile\_data-\>redo\_label != 0) {  
break;  
}  
ip = ip-\>parent\_iseq;  
}

- 

```
 if (ip != 0) {

```

- 

```
 if (error_type_eval) {

```

- COMPILE\_ERROR((ERROR\_ARGS “Can’t escape from eval with redo”));
- 

```
 }

```

- 

```
 else if (ip != 0) {

```

add\_ensure\_iseq(ret, iseq);  
ADD\_INSN1(ret, nd\_line(node), throw,  
INT2FIX(level | 0x05) /\* TAG\_REDO \*/ );

---

<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:** [August 28, 2007, 8:08pm UTC](https://www.ruby-forum.com/t/jump-in-rescue-clause-in-eval-dumps-core/111767/2 "2007-08-28T20:08:20Z")

</div>

e$B1sF#$G$9!#e(B

e$B5^$+$9$h$&$G?=$7Lu$"$j$^$;$s$,e(B [ruby-dev:31372]  
e$B$NBP=h$r$\*4j$$$7$^$9!#e(B

---

<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:** [August 30, 2007, 6:33am UTC](https://www.ruby-forum.com/t/jump-in-rescue-clause-in-eval-dumps-core/111767/3 "2007-08-30T06:33:13Z")

</div>

e$B!!$5$5$@$G$9!%e(B

Yusuke ENDOH wrote:

> e$B5^$+$9$h$&$G?=$7Lu$"$j$^$;$s$,e(B [ruby-dev:31372] e$B$NBP=h$r$\*4j$$$7$^$9!#e(B
> 
> > 1.9 e$B$G8eCVe(B rescue e$B@a$NCf$Ge(B break e$B$de(B next e$B$de(B redo e$B$r$9$k%3!\<%I$re(B  
> > eval e$B$9$k$HMn$A$^$9!#e(B

e$B!!$&!\<$s!$$9$_$^$;$s!%$$$m$$$m9M$($F!$e(Bevale$B$NCf$+$i$N6X;_$r4KOB$9$k$+e(B  
e$B$I$&$+G:$s$G$$$FJ|CV$7$F$$$^$7$?!%:#!$$3$l$K$D$$$F??LLL$K9M$($kM\>M5e(B  
e$B$,$J$$$N$Ge(B9e$B7nCf$^$G%Z%s%G%#%s%0$H$5$;$F$/$@$5$$!%e(B

e$B!!8=:\_$N%P%0$rD\>$9!$$H$$$&0UL#$GD:$$$?%Q%C%A$r$"$F$k$Y$-$J$N$+$J$!!%e(B  
e$B$&!\<$s!%e(B

---

<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:** [August 30, 2007, 2:25pm UTC](https://www.ruby-forum.com/t/jump-in-rescue-clause-in-eval-dumps-core/111767/4 "2007-08-30T14:25:17Z")

</div>

e$B1sF#$G$9!#e(B

> > e$B5^$+$9$h$&$G?=$7Lu$"$j$^$;$s$,e(B [ruby-dev:31372] e$B$NBP=h$r$\*4j$$$7$^$9!#e(B
> > 
> > > 1.9 e$B$G8eCVe(B rescue e$B@a$NCf$Ge(B break e$B$de(B next e$B$de(B redo e$B$r$9$k%3!\<%I$re(B  
> > > eval e$B$9$k$HMn$A$^$9!#e(B
> 
> e$B!!$&!\<$s!$$9$_$^$;$s!%$$$m$$$m9M$($F!$e(Bevale$B$NCf$+$i$N6X;_$r4KOB$9$k$+e(B  
> e$B$I$&$+G:$s$G$$$FJ|CV$7$F$$$^$7$?!%:#!$$3$l$K$D$$$F??LLL$K9M$($kM\>M5e(B  
> e$B$,$J$$$N$Ge(B9e$B7nCf$^$G%Z%s%G%#%s%0$H$5$;$F$/$@$5$$!%e(B

e$B$"!“8!F$Cf$G$7$?$i$$$$$G$9!#8+F($5$l$?$N$+$J!”$H;W$C$?$@$1$J$N$G!#e(B

eval(“next”) e$B$H$+$G$-$?J}$,LLGr$$$+$J$!$H$O;W$$$^$9!#e(B  
e$B\<B:]$KLr$KN)$A$=$&$JNc$O;W$$$D$-$^$;$s$,!#e(B