# \[Bug:1.9\] removing Exception#initialize dumps core

**URL:** <https://www.ruby-forum.com/t/bug-1-9-removing-exception-initialize-dumps-core/152068>\
**Category:** Development\
**Created:** [October 29, 2008, 6:36pm UTC](https://www.ruby-forum.com/t/bug-1-9-removing-exception-initialize-dumps-core/152068 "2008-10-29T18:36:33Z")\
**Posts on this page:** 6\
**Page:** 1

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**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:** [October 29, 2008, 6:36pm UTC](https://www.ruby-forum.com/t/bug-1-9-removing-exception-initialize-dumps-core/152068/1 "2008-10-29T18:36:33Z")

</div>

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e$B0J2\<$Ge(B SEGV e$B$7$^$9$,!";EMM$G$7$g$&$+!#e(B

$ ./ruby -e ‘class Exception; remove\_method(:initialize); end; raise’  
-e:1: warning: removing `initialize’ may cause serious problem  
e$B%;%0%a%s%F!\<%7%g%s0cH?$G$9e(B

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<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:** [October 31, 2008, 6:04am UTC](https://www.ruby-forum.com/t/bug-1-9-removing-exception-initialize-dumps-core/152068/2 "2008-10-31T06:04:26Z")

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In message “Re: [ruby-dev:36993] [Bug:1.9] removing Exception#initialize  
dumps core”  
on Thu, 30 Oct 2008 02:35:10 +0900, “Yusuke ENDOH” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
writes:

|e$B0J2\<$Ge(B SEGV e$B$7$^$9$,!";EMM$G$7$g$&$+!#e(B  
|  
|$ ./ruby -e ‘class Exception; remove\_method(:initialize); end; raise’  
|-e:1: warning: removing `initialize’ may cause serious problem  
|e$B%;%0%a%s%F!\<%7%g%s0cH?$G$9e(B

e$B$J$K$,5/$-$F$k$+$H$$$&$He(B

- raisee$B$GNc30%\*%V%8%'%/%H$r:n$m$&$H$9$ke(B
- Exception#initializee$B$,:o=|$5$l$F$$$k$N$Ge(B  
BasicObject#initializee$B$r8F$Ve(B
- BasicObject#initializee$B$O0z?t$r\<h$i$J$$$N$G0z?t$N?t$,$"$oe(B  
e$B$:e(BArgumentError e$B$,H/@8$9$ke(B(raisee$B$9$ke(B)
- raisee$B$GNc30%\*%V%8%'%/%H$r:n$m$&$H$9$ke(B
- e$B0J2\<7+$jJV$7!#L58B:F5"$G%9%?%C%/$r;H$$$-$C$Fe(BSEGV

e$B$G$9!#e(BBasicObject#initializee$B$rG$0U8D$N0z?t$r\<u$1IU$1$ke(B(e$B$G!“L5e(B  
e$B;k$9$ke(B)e$B$h$&$K$9$l$P!”$3$NLdBj$O$J$/$J$j$^$9$,!"$?$H$($Pe(B  
Exception#initializee$B$rFbIt$GNc30$rH/@8$9$k$b$N$KCV$-49$($?$je(B  
e$B$9$l$PF1$8$3$H$,5/$-$^$9!#e(B

e$B$3$N$3$H$+$i9M$($k$H$"$s$^$jD\>$9I,MW$O$J$5$=$&$K;W$$$^$9!#$`e(B  
e$B$7$m!“e(B(e$B%3%9%H$N$3$H$r9M$($J$1$l$Pe(B)e$BL58B:F5”%A%'%C%/$r87$7$/$9e(B  
e$B$kJ}$,M-8z$+$H!#e(B

```
                            e$B$^$D$b$He(B e$B$f$-$R$me(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:** [October 31, 2008, 3:51pm UTC](https://www.ruby-forum.com/t/bug-1-9-removing-exception-initialize-dumps-core/152068/3 "2008-10-31T15:51:46Z")

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2008/10/31 14:02 Yukihiro M. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid):

> Exception#initializee$B$rFbIt$GNc30$rH/@8$9$k$b$N$KCV$-49$($?$je(B  
> e$B$9$l$PF1$8$3$H$,5/$-$^$9!#e(B
> 
> e$B$3$N$3$H$+$i9M$($k$H$"$s$^$jD\>$9I,MW$O$J$5$=$&$K;W$$$^$9!#$`e(B  
> e$B$7$m!“e(B(e$B%3%9%H$N$3$H$r9M$($J$1$l$Pe(B)e$BL58B:F5”%A%'%C%/$r87$7$/$9e(B  
> e$B$kJ}$,M-8z$+$H!#e(B

e$B$3$N7o$K4X$7$F$O!VD\>$9I,MW$,$J$$!W$H$$$&H=CG$b$$$$$H;W$$$^$9!#e(B  
e$B$G$b$=$l$J$iJ8\>O2=$7$?J}$,$$$$$H;W$$$^$9!#e(B

e$B$H$j$"$($:e(B redmine e$B$Ke(B WontFix  
e$B$H$$$&%(%s%H%j$r:n$C$F$\*$-$^$7$?!#e(B  
[http://redmine.ruby-lang.org/wiki/ruby-19/WontFix](http://redmine.ruby-lang.org/wiki/ruby-19/WontFix)

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<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:** [November 18, 2008, 3:34pm UTC](https://www.ruby-forum.com/t/bug-1-9-removing-exception-initialize-dumps-core/152068/4 "2008-11-18T15:34:00Z")

</div>

e$B%A%1%C%He(B #699 e$B$,99?7$5$l$^$7$?!#e(B (by Yukihiro M.)

e$B%9%F!\<%?%9e(B Opene$B$+$ie(BClosede$B$KJQ99e(B

## e$B$3$l$K$D$$$F$O=$@5$7$J$$$3$H$K$7$^$9e(B

[http://redmine.ruby-lang.org/issues/show/699](http://redmine.ruby-lang.org/issues/show/699)

---

<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:** [November 21, 2008, 8:06am UTC](https://www.ruby-forum.com/t/bug-1-9-removing-exception-initialize-dumps-core/152068/5 "2008-11-21T08:06:38Z")

</div>

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

e$B$3$s$K$A$O!"e(B

> > e$B$J$K$,5/$-$F$k$+$H$$$&$He(B  
> > e$B;k$9$ke(B)e$B$h$&$K$9$l$P!“$3$NLdBj$O$J$/$J$j$^$9$,!”$?$H$($Pe(B  
> > e$B$H$j$"$($:e(B redmine e$B$Ke(B WontFix e$B$H$$$&%(%s%H%j$r:n$C$F$\*$-$^$7$?!#e(B  
> > [http://redmine.ruby-lang.org/wiki/ruby-19/WontFix](http://redmine.ruby-lang.org/wiki/ruby-19/WontFix)

# rubye$B$N\<BAu$r$^$C$?$/$o$+$C$F$$$J$$Lg304A$J$N$G$9$,!"e(B

— vm\_method.c (revision 20086)  
+++ vm\_method.c (working copy)  
@@ -314,7 +314,7 @@  
if (OBJ\_FROZEN(klass))  
rb\_error\_frozen(“class/module”);  
if (mid == object\_id || mid == **send** || mid == idInitialize) {

- 

```
  rb_warn("removing `%s' may cause serious problem", 

```

rb\_id2name(mid));

- 

```
  rb_bug("removing `%s' may cause serious problem", 

```

rb\_id2name(mid));  
}  
if (st\_lookup(RCLASS\_M\_TBL(klass), mid, &data)) {  
body = (NODE \*)data;

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e$B%Q%C%A$H$”$o$;$o$6$Ge(B

$ ./ruby -e ‘class Exception; remove\_method(:initialize); end; raise’  
-e:1: [BUG] removing `initialize’ may cause serious problem  
ruby 1.9.0 (2008-11-01 revision 20086) [i686-linux]

## – control frame ---------- c:0005 p:---- s:0012 b:0012 l:000011 d:000011 CFUNC :remove\_method c:0004 p:0013 s:0008 b:0008 l:000007 d:000007 CLASS -e:1 c:0003 p:0009 s:0006 b:0006 l:000005 d:000005 TOP -e:1 c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH :inherited c:0001 p:0000 s:0002 b:0002 l:000001 d:000001 TOP :17

## DBG\> : “-e:1:in `remove_method'" DBG> : "-e:1:in `class:Exception’” DBG\> : “-e:1:in `'” – backtrace of native function call (Use addr2line) – 0x8122c24 0x814e3dc 0x814e44b 0x811cc08 0x811cd62 0x81109dd 0x81128b3 0x811532d 0x8119664 0x811984c 0x805ce9f 0x805e682 0x805bd90 0xb7d7a685 0x805bc91

Aborted  
e$B$HMn$A$F$/$l$^$9!#e(B

rb\_warn()  
e$B$G$I$&$K$+%j%+%P%j$r;n$\_$F$$$k$h$&$G$9$,!“$”$-$i$a$A$c$&$H$$$&$N$Oe(B  
e$B$@$a$J$s$G$7$g$&$+!)e(B

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## e$B$he(B

Hiro Y.  
Miracle Linux Corporation  
[http://blog.miraclelinux.com/yume/](http://blog.miraclelinux.com/yume/)

> **[未来のいつか/hyoshiokの日記](https://hyoshiok.hatenablog.com/)**
>
> hyoshiokの日々思うことをあれやこれや

---

<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:** [November 27, 2008, 4:06am UTC](https://www.ruby-forum.com/t/bug-1-9-removing-exception-initialize-dumps-core/152068/6 "2008-11-27T04:06:45Z")

</div>

e$B$J$+$@$G$9!#e(B

At Fri, 21 Nov 2008 16:02:12 +0900,  
Hiro Y. wrote in [ruby-dev:37134]:

> rb\_warn() e$B$G$I$&$K$+%j%+%P%j$r;n$\_$F$$$k$h$&$G$9$,!"$"$-$i$a$A$c$&$H$$$&$N$Oe(B  
> e$B$@$a$J$s$G$7$g$&$+!)e(B

e$B$"$-$i$a$A$c$&$3$H$K$OH?BP$7$^$;$s$,!"e(Brb\_bug()e$B$O%@%a$G$7$g$&!#e(B  
rb\_bug()e$B$Oe(Brubye$B\<+?H$,=$@5BP\>]$H$J$k%P%0$H$$$&$3$H$G$9!#%f!\<%6%9%/e(B  
e$B%j%W%H$KBP$7$FH/@8$7$F$O$$$1$^$;$s!#e(Brb\_raise()e$B$r;H$&$Y$-$G$7$g$&!#e(B