# Hash$B$N%G%U%)%k%HCM$N%V%m%C%/$GL58B%k!\<%W$9$k$H(Bcore

**URL:** <https://www.ruby-forum.com/t/hash-b-n-g-u-k-hcm-n-v-m-c-gl58b-k-w-9-k-h-bcore/164542>\
**Category:** Development\
**Created:** [April 2, 2009, 12:18pm UTC](https://www.ruby-forum.com/t/hash-b-n-g-u-k-hcm-n-v-m-c-gl58b-k-w-9-k-h-bcore/164542 "2009-04-02T12:18:35Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![KISHIMOTOS\_Makoto](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/8baadc/32.png) [@KISHIMOTOS\_Makoto](https://www.ruby-forum.com/u/KISHIMOTOS_Makoto)\
**Post date:** [April 2, 2009, 12:18pm UTC](https://www.ruby-forum.com/t/hash-b-n-g-u-k-hcm-n-v-m-c-gl58b-k-w-9-k-h-bcore/164542/1 "2009-04-02T12:18:35Z")

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e$B$-$7$b$H$G$9e(B

trunke$B$G0J2\<$N$h$&$J!“L58B$K:F5”$9$k%9%/%j%W%H$r\<B9T$9$k$H!"e(B  
SystemStackErrore$B$K$J$i$:$Ke(Bcoree$B$rEG$-$^$9!#e(B

Foo = Hash.new{|h, k| bar}  
def bar  
Foo[‘key’]  
end  
bar

---

<div class="post-metadata">

**Author:** ![KISHIMOTOS\_Makoto](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/8baadc/32.png) [@KISHIMOTOS\_Makoto](https://www.ruby-forum.com/u/KISHIMOTOS_Makoto)\
**Post date:** [April 6, 2009, 1:46pm UTC](https://www.ruby-forum.com/t/hash-b-n-g-u-k-hcm-n-v-m-c-gl58b-k-w-9-k-h-bcore/164542/2 "2009-04-06T13:46:13Z")

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

In message “Re: [ruby-dev:38252]  
Hashe$B$N%G%U%)%k%HCM$N%V%m%C%/$GL58B%k!\<%W$9$k$He(Bcore”  
on Thu, 2 Apr 2009 19:17:22 +0900, “KISHIMOTO, Makoto”  
[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes:

|trunke$B$G0J2\<$N$h$&$J!“L58B$K:F5”$9$k%9%/%j%W%H$r\<B9T$9$k$H!"e(B  
|SystemStackErrore$B$K$J$i$:$Ke(Bcoree$B$rEG$-$^$9!#e(B

e$B;d$N5-21$,@5$7$1$l$P!"L58B%k!\<%W$r40A4$K8!=P$9$k$?$a$K$O$+$Je(B  
e$B$j$N\<B9T%Z%J%k%F%#$r$H$b$J$&$?$a!"8=\>u$O$=$3$^$GE0Dl$7$F$$$Je(B  
e$B$$$H;W$$$^$9!#e(B

---

<div class="post-metadata">

**Author:** ![KISHIMOTOS\_Makoto](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/8baadc/32.png) [@KISHIMOTOS\_Makoto](https://www.ruby-forum.com/u/KISHIMOTOS_Makoto)\
**Post date:** [April 7, 2009, 1:15pm UTC](https://www.ruby-forum.com/t/hash-b-n-g-u-k-hcm-n-v-m-c-gl58b-k-w-9-k-h-bcore/164542/3 "2009-04-07T13:15:35Z")

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> |trunke$B$G0J2\<$N$h$&$J!“L58B$K:F5”$9$k%9%/%j%W%H$r\<B9T$9$k$H!"e(B  
> |SystemStackErrore$B$K$J$i$:$Ke(Bcoree$B$rEG$-$^$9!#e(B
> 
> e$B;d$N5-21$,@5$7$1$l$P!"L58B%k!\<%W$r40A4$K8!=P$9$k$?$a$K$O$+$Je(B  
> e$B$j$N\<B9T%Z%J%k%F%#$r$H$b$J$&$?$a!"8=\>u$O$=$3$^$GE0Dl$7$F$$$Je(B  
> e$B$$$H;W$$$^$9!#e(B

e$B$?$H$($P0J2\<$N$h$&$JL58B%k!\<%W$N\>l9g!"e(BSystemStackErrore$B$K$J$k$N$G$9$,!"e(B  
e$B$3$l$OL58B%k!\<%W$r8!=P$7$F$=$&$7$F$$$k$N$G$7$g$&$+!)e(B

$ cat foo.rb  
def foo  
foo  
end  
foo  
$ ruby19 foo.rb  
foo.rb:2:in `foo': stack level too deep (SystemStackError) from foo.rb:2:in`foo’  
from foo.rb:2:in `foo' from foo.rb:2:in`foo’  
from foo.rb:2:in `foo' from foo.rb:2:in`foo’  
from foo.rb:2:in `foo' from foo.rb:2:in`foo’  
from foo.rb:2:in `foo' ... 8717 levels... from foo.rb:2:in`foo’  
from foo.rb:2:in `foo' from foo.rb:2:in`foo’  
from foo.rb:5:in `’

---

<div class="post-metadata">

**Author:** ![KISHIMOTOS\_Makoto](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/8baadc/32.png) [@KISHIMOTOS\_Makoto](https://www.ruby-forum.com/u/KISHIMOTOS_Makoto)\
**Post date:** [April 7, 2009, 5:44pm UTC](https://www.ruby-forum.com/t/hash-b-n-g-u-k-hcm-n-v-m-c-gl58b-k-w-9-k-h-bcore/164542/4 "2009-04-07T17:44:54Z")

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

At Tue, 7 Apr 2009 20:36:00 +0900,  
SASADA Koichi wrote in [ruby-dev:38288]:

> e$B!!:G=i$NNc$O!$e(BRuby e$B$+$ie(B C e$B$r8F$S=P$7$F!$$=$3$+$ie(B Ruby e$B$r8F$s$G!$$=$l$,e(B C  
> e$B$K!$$H$$$&$h$&$K!$e(BC e$B8F$S=P$7$,=E$J$j!$%^%7%s%9%?%C%/$,%_!\<%P!\<%U%m!\<$7$^e(B  
> e$B$9!%e(BC e$B%l%Y%k$G$N!$%^%7%s%9%?%C%/$N%_!\<%P!\<%U%m!\<$O!$??LLL$K8!=P$9$k$N$Oe(B  
> e$BBgJQ$J$N$G$d$C$F$$$J$$!$$H$$$&$3$H$8$c$J$$$+$H;W$$$^$9!%%^%7%s!&e(BOSe$B0MB8$Ne(B  
> e$B8!=PJ}K!$O$"$k$1$l$I!$$^$!$=$3$^$G??LLL$K$d$C$F$$$J$$!$$s$8$c$J$+$C$?$Ge(B  
> e$B$7$?$C$1$+!J$"$l!$e(Bsegv e$B%O%s%I%i\<~$j$G$J$s$+$d$C$F$?$C$1!)!K!%e(B

sigaltstack()e$B$N$"$k%7%9%F%`$G$O8!=P$7$F$$$k$O$:$G$9!#$?$@$7!"%9e(B  
e$B%?%C%/%\*!\<%P!\<%U%m!\<$H$=$l0J30$Ne(BSEGVe$B$NH=JL$K$OHyL/$JItJ,$b$"$k$Ne(B  
e$B$G$9$,!"$-$7$b$H$5$s$N4D6-$,ITL@$J$N$G$J$s$H$b$$$($^$;$s!#e(B

---

<div class="post-metadata">

**Author:** ![KISHIMOTOS\_Makoto](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/8baadc/32.png) [@KISHIMOTOS\_Makoto](https://www.ruby-forum.com/u/KISHIMOTOS_Makoto)\
**Post date:** [April 7, 2009, 1:37pm UTC](https://www.ruby-forum.com/t/hash-b-n-g-u-k-hcm-n-v-m-c-gl58b-k-w-9-k-h-bcore/164542/5 "2009-04-07T13:37:51Z")

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

KISHIMOTO, Makoto wrote::

> > e$B;d$N5-21$,@5$7$1$l$P!"L58B%k!\<%W$r40A4$K8!=P$9$k$?$a$K$O$+$Je(B  
> > e$B$j$N\<B9T%Z%J%k%F%#$r$H$b$J$&$?$a!"8=\>u$O$=$3$^$GE0Dl$7$F$$$Je(B  
> > e$B$$$H;W$$$^$9!#e(B

e$B!!L58B%k!\<%W$N8!=P$H$$$&$+!$%9%?%C%/%\*!\<%P!\<%U%m!\<$N8!=P$G$9$h$M!%L58Be(B  
e$B%k!\<%W$N8!=P$7$?$C$F!$e(Bwhile true; …; end  
e$B$OB?J,@5$7$$%W%m%0%i%`!%e(B

> e$B$?$H$($P0J2\<$N$h$&$JL58B%k!\<%W$N\>l9g!"e(BSystemStackErrore$B$K$J$k$N$G$9$,!"e(B  
> e$B$3$l$OL58B%k!\<%W$r8!=P$7$F$=$&$7$F$$$k$N$G$7$g$&$+!)e(B

e$B!!e(BRuby e$B%l%Y%k$G$N%9%?%C%/%_!\<%P!\<%U%m!\<!$$D$^$je(B VM  
e$B%l%Y%k$G$N%9%?%C%/e(B  
e$B%_!\<%P!\<%U%m!\<$O!JB?J,!K$-$A$s$H8!=P$9$k$h$&$K$J$C$F$$$^$9!%e(B

e$B!!:G=i$NNc$O!$e(BRuby e$B$+$ie(B C e$B$r8F$S=P$7$F!$$=$3$+$ie(B Ruby  
e$B$r8F$s$G!$$=$l$,e(B C  
e$B$K!$$H$$$&$h$&$K!$e(BC  
e$B8F$S=P$7$,=E$J$j!$%^%7%s%9%?%C%/$,%_!\<%P!\<%U%m!\<$7$^e(B  
e$B$9!%e(BC  
e$B%l%Y%k$G$N!$%^%7%s%9%?%C%/$N%_!\<%P!\<%U%m!\<$O!$??LLL$K8!=P$9$k$N$Oe(B  
e$BBgJQ$J$N$G$d$C$F$$$J$$!$$H$$$&$3$H$8$c$J$$$+$H;W$$$^$9!%%^%7%s!&e(BOSe$B0MB8$Ne(B  
e$B8!=PJ}K!$O$"$k$1$l$I!$$^$!$=$3$^$G??LLL$K$d$C$F$$$J$$!$$s$8$c$J$+$C$?$Ge(B  
e$B$7$?$C$1$+!J$"$l!$e(Bsegv  
e$B%O%s%I%i\<~$j$G$J$s$+$d$C$F$?$C$1!)!K!%e(B

---

<div class="post-metadata">

**Author:** ![KISHIMOTOS\_Makoto](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/8baadc/32.png) [@KISHIMOTOS\_Makoto](https://www.ruby-forum.com/u/KISHIMOTOS_Makoto)\
**Post date:** [April 9, 2009, 4:29am UTC](https://www.ruby-forum.com/t/hash-b-n-g-u-k-hcm-n-v-m-c-gl58b-k-w-9-k-h-bcore/164542/6 "2009-04-09T04:29:39Z")

</div>

e$B$h$7$\*$+$H?=$7$^$9!#e(B

sigsegve$B$G$3$1$k$H$-$Ke(Bsigaltstack()e$B$r;H$&$H$$$&$\*OC$G$7$?$i!“e(B

> **[2008-11-16](https://hyoshiok.hatenablog.com/entries/2008/11/16)**
>
> hyoshiokの日々思うことをあれやこれや

> **[2008-11-16](https://hyoshiok.hatenablog.com/entries/2008/11/16)**
>
> hyoshiokの日々思うことをあれやこれや

e$B$”$?$j$N$\*OC$+$J$"$H;W$$$^$9!#e(B

e$B:G6ae(BDebug Hackse$B$H$$$&K$r=q$$$?$N$G$9$,!“e(B  
e$B$=$l$r%M%?$Ke(BHacke$B$r=q$-$^$7$?!#e(B  
[http://www.oreilly.co.jp/editors/archives/2009/03/debug-hackshack.html](http://www.oreilly.co.jp/editors/archives/2009/03/debug-hackshack.html)  
[http://www.oreilly.co.jp/editors/debug\_hacks\_26.pdf](http://www.oreilly.co.jp/editors/debug_hacks_26.pdf)  
e$B”,$K869Fe(BPDFe$B$,$"$j$^$9!#$4\>PMw$$$?$@$1$l$P9,$$$G$9!#e(B

e$BL$\>5Bz9-9p\<:Ni$7$^$7$?!#e(B

## e$B$he(B

> **[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

[http://someday-join-us.blogspot.com/](http://someday-join-us.blogspot.com/)  
[http://blog.miraclelinux.com/yume/](http://blog.miraclelinux.com/yume/)  
[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Debug Hacks–e$B%G%P%C%0$r6K$a$k%F%/%K%C%/!u%D!\<%kM=Ls\<uIUCfe(B

> **[Debug Hacks](https://www.oreilly.co.jp/books/9784873114040/)**
>
> ミラクル・リナックス株式会社の精鋭エンジニアたちが、長年のLinuxカーネル開発の経験で培ったデバッグテクニックを詳解。こころがまえから、準備、必要な知識、バグの原因をすばやく特定し修正するために便利なテクニックとツール、高度なデバッグ技まで惜しみなく披露します。多くの事例に基づいた実際的実用的な技が満載です。効率良くかつクオリティーの高い開発のために必須の一冊です。
> 
> 
> 
> Debug...

2009/4/8 Nobuyoshi N. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid):