# 0..$1=0 dumps core

**URL:** <https://www.ruby-forum.com/t/0-1-0-dumps-core/108431>\
**Category:** Development\
**Created:** [July 3, 2007, 1:38pm UTC](https://www.ruby-forum.com/t/0-1-0-dumps-core/108431 "2007-07-03T13:38:01Z")\
**Posts on this page:** 3\
**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:** [July 3, 2007, 1:38pm UTC](https://www.ruby-forum.com/t/0-1-0-dumps-core/108431/1 "2007-07-03T13:38:01Z")

</div>

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

1.9 e$B$G0J2\<$N$h$&$K$9$k$HMn$A$^$9!#e(B

## $ ./ruby -e ‘0…$1=0’ Can’t set variable $1 – control frame ---------- c:0001 p:---- s:0001 b:-001 l:000000 d:000000 ------

## – backtrace of native function call (Use addr2line) – 0x80dad25 0x80f3f90 0x80b2620 0xffffe420 0x809108f 0x809137f 0x809140e 0x80b16c1 0x80b1a57 0x805c5d4 0x8056d8a 0xb7da3ea8 0x8056cc1

[BUG] Segmentation fault  
ruby 1.9.0 (2007-07-03) [i686-linux]

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

e$BB\>$K$b0J2\<$N$h$&$J$b$N$G$bMn$A$^$9!#e(B

0…$1+=0  
0…A::A+=0  
0…::A+=0

[ruby-dev:31085] e$B$de(B [ruby-dev:31100] e$B$bF1$8860x$G$9$,!"e(B  
e$B$3$l$i$O$R$g$C$H$7$Fe(B arg tDOT2 arg (e$B$^$?$Oe(B value\_expr)  
e$B$H$+$NJ}$Ge(B  
e$BBP1~$9$Y$-$3$H$G$7$g$&$+!#e(B

# Index: parse.y

— parse.y (revision 12681)  
+++ parse.y (working copy)  
@@ -1884,6 +1884,10 @@  
| arg tDOT2 arg  
{  
/_%%%_/

- 

```
 if(!$1 || !$3) {

```

- 

```
     $$ = 0;

```

- 

```
 }

```

- 

```
 else {
 value_expr($1);
 value_expr($3);
 if (nd_type($1) == NODE_LIT && FIXNUM_P($1->nd_lit) &&

```

@@ -1894,6 +1898,7 @@  
else {  
$$ = NEW\_DOT2($1, $3);  
}

- 

```
 }
   /*%
 $$ = dispatch2(dot2, $1, $3);
   %*/

```

@@ -1901,6 +1906,10 @@  
| arg tDOT3 arg  
{  
/_%%%_/

- 

```
 if(!$1 || !$3) {

```

- 

```
     $$ = 0;

```

- 

```
 }

```

- 

```
 else {
 value_expr($1);
 value_expr($3);
 if (nd_type($1) == NODE_LIT && FIXNUM_P($1->nd_lit) &&

```

@@ -1911,6 +1920,7 @@  
else {  
$$ = NEW\_DOT3($1, $3);  
}

- 

```
 }
   /*%
 $$ = dispatch2(dot3, $1, $3);
   %*/
```

---

<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:** [July 7, 2007, 9:13am UTC](https://www.ruby-forum.com/t/0-1-0-dumps-core/108431/2 "2007-07-07T09:13:17Z")

</div>

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

Yusuke ENDOH wrote:

> 1.9 e$B$G0J2\<$N$h$&$K$9$k$HMn$A$^$9!#e(B
> 
> $ ./ruby -e ‘0…$1=0’  
> …  
> [ruby-dev:31085] e$B$de(B [ruby-dev:31100] e$B$bF1$8860x$G$9$,!"e(B  
> e$B$3$l$i$O$R$g$C$H$7$Fe(B arg tDOT2 arg (e$B$^$?$Oe(B value\_expr) e$B$H$+$NJ}$Ge(B  
> e$BBP1~$9$Y$-$3$H$G$7$g$&$+!#e(B

e$B!!;d$O%Q!\<%5$O$J$k$Y$/?($i$J$$$h$&$K$7$F$$$k$s$G$9$,!J:#2s$NOCe(B  
e$B$bH=CG$,$G$-$J$$!K!"$^$D$b$H$5$s$rBT$F$P$$$$$G$7$g$&$+!#$=$l$He(B  
e$B$b!";d$bFI$^$J$$$HBLL$+$J$!!JFI$a$?$[$&$,$$$$$s$@$m$&$1$I!K!#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:** [July 7, 2007, 9:30am UTC](https://www.ruby-forum.com/t/0-1-0-dumps-core/108431/3 "2007-07-07T09:30:18Z")

</div>

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:31158] Re: 0…$1=0 dumps core”  
on Sat, 7 Jul 2007 16:12:16 +0900, SASADA Koichi [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
writes:

|\> [ruby-dev:31085] e$B$de(B [ruby-dev:31100] e$B$bF1$8860x$G$9$,!“e(B  
|\> e$B$3$l$i$O$R$g$C$H$7$Fe(B arg tDOT2 arg (e$B$^$?$Oe(B value\_expr) e$B$H$+$NJ}$Ge(B  
|\> e$BBP1~$9$Y$-$3$H$G$7$g$&$+!#e(B  
|  
|e$B!!;d$O%Q!\<%5$O$J$k$Y$/?($i$J$$$h$&$K$7$F$$$k$s$G$9$,!J:#2s$NOCe(B  
|e$B$bH=CG$,$G$-$J$$!K!”$^$D$b$H$5$s$rBT$F$P$$$$$G$7$g$&$+!#$=$l$He(B  
|e$B$b!";d$bFI$^$J$$$HBLL$+$J$!!JFI$a$?$[$&$,$$$$$s$@$m$&$1$I!K!#e(B

e$B;d$NC4Ev$J$s$GBT$C$F$F$$$$$G$9!#$G$b!“FI$s$G$/$l$F$b$$$$$G$9!#e(B  
e$B$=$7$?$i!”;d$KK|0l$,$"$C$F$b0B?4!#e(B

```
                            e$B%P%9$K5$$r$D$1$h$&e(B
                            e$B$^$D$b$He(B e$B$f$-$R$me(B /:|)

```