[ruby-dev:24254] core dump wnen array length is changed in Array#==

次のようにすると core を吐きます。

% ruby -e '
len = 100000
$arr1 = Array.new(len)
$arr2 = Array.new(len)
o = Object.new
def o.==(o2)
  $arr2.compact!
  true
end
$arr1[100] = o
p $arr1 == $arr2
'
zsh: segmentation fault (core dumped)  ruby -e 
% ruby -v
ruby 1.9.0 (2004-09-11) [i686-linux]
% gdb ruby core 
GNU gdb 6.1-debian
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-linux"...Using host libthread_db library "/lib/libthread_db.so.1".

Core was generated by `ruby -e 
len = 100000
$arr1 = Array.new(len)
$arr2 = Array.new(len)
o = Object.'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /lib/libdl.so.2...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /lib/libcrypt.so.1...done.
Loaded symbols for /lib/libcrypt.so.1
Reading symbols from /lib/libm.so.6...done.
Loaded symbols for /lib/libm.so.6
Reading symbols from /lib/libc.so.6...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
#0  0x080c57b3 in rb_ary_equal (ary1=1075608036, ary2=1075608016)
    at array.c:2547
2547            if (!rb_equal(RARRAY(ary1)->ptr[i], RARRAY(ary2)->ptr[i]))
(gdb) bt
#0  0x080c57b3 in rb_ary_equal (ary1=1075608036, ary2=1075608016)
    at array.c:2547
#1  0x08069e52 in call_cfunc (func=0x80c5700 <rb_ary_equal>, recv=1075608036, 
    len=0, argc=4, argv=0xbfffead8) at eval.c:5361
#2  0x0805e117 in rb_call0 (klass=1075647656, recv=1075608036, id=322, 
    oid=1076080648, argc=1, argv=0xbfffead8, body=0x401d1304, nosuper=0)
    at eval.c:5504
#3  0x0805e3c8 in rb_call (klass=1075647656, recv=1075608036, mid=322, argc=1, 
    argv=0xbfffead8, scope=0) at eval.c:5725
#4  0x08059308 in rb_eval (self=1075673496, n=0x4023b008) at ruby.h:634
#5  0x08059638 in rb_eval (self=1075673496, n=0x4023b008) at ruby.h:663
#6  0x0805589b in ruby_exec () at eval.c:1458
#7  0x080558e0 in ruby_run () at eval.c:1479
#8  0x080539b5 in main (argc=1076080648, argv=0x4023b008, envp=0xbffff914)
    at main.c:38
(gdb) 
-- 
[田中 哲][たなか あきら][Tanaka Akira]