# Memory leak by Array#sort!

**URL:** <https://www.ruby-forum.com/t/memory-leak-by-array-sort/137785>\
**Category:** Development\
**Created:** [May 16, 2008, 11:06am UTC](https://www.ruby-forum.com/t/memory-leak-by-array-sort/137785 "2008-05-16T11:06:26Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [May 16, 2008, 11:06am UTC](https://www.ruby-forum.com/t/memory-leak-by-array-sort/137785/1 "2008-05-16T11:06:26Z")

</div>

e$B0J2\<$N$h$&$K!"e(BArray#sort!  
e$B$NCf$GG[Ns$rJQ99$9$k$H%a%b$j%j!\<%/$7$^$9!#e(B

% ./ruby -ve ’  
loop {  
ary = (1…100).to\_a  
ary.sort! {|a,b| ary[0] = “a”; a \<=\> b}  
GC.start  
puts File.read("/proc/#{$$}/status").lines.grep(/^VmSize/)  
}  
’  
ruby 1.9.0 (2008-05-16 revision 16436) [i686-linux]  
VmSize: 7256 kB  
…  
VmSize: 27220 kB  
…

e$B$"$H!"\>e5-$N%9%/%j%W%H$re(B ^C e$B$G;\_$a$?;~!“0J2\<$Ne(B TypeError  
e$B$Ke(B  
e$B$J$k$3$H$,$”$j$^$9!#e(B

-e:6:in `write': invalid inspect_tbl list for :write in #<Thread:0x81bc620 run> (TypeError) from -e:6:in`puts’  
from -e:6:in `puts' from -e:6:in`block in ’  
from -e:2:in `loop' from -e:2:in`’

---

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [May 16, 2008, 8:24pm UTC](https://www.ruby-forum.com/t/memory-leak-by-array-sort/137785/2 "2008-05-16T20:24:14Z")

</div>

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

In message “Re: [ruby-dev:34726] memory leak by Array#sort!”  
on Fri, 16 May 2008 18:05:55 +0900, Tanaka A. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
writes:

|e$B0J2\<$N$h$&$K!"e(BArray#sort! e$B$NCf$GG[Ns$rJQ99$9$k$H%a%b$j%j!\<%/$7$^$9!#e(B

e$BD\>$7$^$7$?!#$^$5$+!“@55,I=8=%^%C%A$K$b%j!\<%/$,$”$k$H$O;W$$$^e(B  
e$B$;$s$G$7$?!#%l%8%9%?!\<$re(Bfreee$B$9$k$N$rK:$l$F$^$7$?!#e(B

|e$B$“$H!”\>e5-$N%9%/%j%W%H$re(B ^C e$B$G;\_$a$?;~!“0J2\<$Ne(B TypeError e$B$Ke(B  
|e$B$J$k$3$H$,$”$j$^$9!#e(B  
|  
|-e:6:in `write': invalid inspect_tbl list for :write in #<Thread:0x81bc620 run> (TypeError) | from -e:6:in `puts’  
| from -e:6:in `puts' | from -e:6:in `block in ’  
| from -e:2:in `loop' | from -e:2:in `’

e$B$3$A$i$O:F8=$7$^$;$s$G$7$?!#e(B

---

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [May 17, 2008, 5:47pm UTC](https://www.ruby-forum.com/t/memory-leak-by-array-sort/137785/3 "2008-05-17T17:47:52Z")

</div>

In article [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid),  
Yukihiro M. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes:

> e$BD\>$7$^$7$?!#$^$5$+!“@55,I=8=%^%C%A$K$b%j!\<%/$,$”$k$H$O;W$$$^e(B  
> e$B$;$s$G$7$?!#%l%8%9%?!\<$re(Bfreee$B$9$k$N$rK:$l$F$^$7$?!#e(B

e$B$3$N=$@5$,F~$C$F$+$ie(B test-all e$B$,e(B SEGV e$B$7$F$$$^$9!#e(B

[http://www.rubyist.net/~akr/chkbuild/debian-sarge/ruby-trunk/log/20080517T064901.txt.gz](http://www.rubyist.net/~akr/chkbuild/debian-sarge/ruby-trunk/log/20080517T064901.txt.gz)

e$B$=$N8e$N$J$+$@$5$s$NJQ99$N8e$G$be(B SEGV e$B$N$^$^$G$9!#e(B

[http://www.rubyist.net/~akr/chkbuild/debian-sarge/ruby-trunk/log/20080517T144700.txt.gz](http://www.rubyist.net/~akr/chkbuild/debian-sarge/ruby-trunk/log/20080517T144700.txt.gz)

---

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [May 17, 2008, 6:58am UTC](https://www.ruby-forum.com/t/memory-leak-by-array-sort/137785/4 "2008-05-17T06:58:12Z")

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

At Sat, 17 May 2008 03:23:27 +0900,  
Yukihiro M. wrote in [ruby-dev:34731]:

> |e$B0J2\<$N$h$&$K!"e(BArray#sort! e$B$NCf$GG[Ns$rJQ99$9$k$H%a%b$j%j!\<%/$7$^$9!#e(B
> 
> e$BD\>$7$^$7$?!#$^$5$+!"@55,I=8=%^%C%A$K$b%j!\<%/$,$"$k$H$O;W$$$^e(B  
> e$B$;$s$G$7$?!#%l%8%9%?!\<$re(Bfreee$B$9$k$N$rK:$l$F$^$7$?!#e(B

e$B0J2\<$N$h$&$J%3!\<%I$Ge(BSEGVe$B$7$^$9!#e(B

xary = (1…100).to\_a  
loop {  
ary = (1…100).to\_a  
ary.sort! {|a,b| ary.replace(xary); a \<=\> b}  
GC.start  
puts File.read("/proc/#{$$}/status").lines.grep(/^VmSize/)  
}