From: Yukihiro Matsumoto <matz@...>
Date: 2009-02-28T02:58:59+09:00
Subject: [ruby-dev:38106] test/ruby/test_m17n.rb dumps core

まつもと ゆきひろです

testでSEGVします。で、どうやら文字列オブジェクトのklassフィー
ルドが壊れているようです。リテラルのklassをいじった時になに
か問題が発生した？

(gdb) r -I lib -I .ext/i686-linux test/ruby/test_m17n.rb
....................................................
Program received signal SIGSEGV, Segmentation fault.
0x081878fe in rb_method_node (klass=83947736, id=13544) at vm_method.c:229
(gdb) p klass
$9 = 83947736
(gdb) rp klass
Cannot access memory at address 0x500f0d8
(gdb) up
#1  0x08190959 in vm_exec_core (th=0x82f7288, initial=<value optimized out>) at vm_insnhelper.c:1172
(gdb) up
#2  0x08191302 in vm_exec (th=0x82f7288) at vm.c:1078
(gdb) down
#1  0x08190959 in vm_exec_core (th=0x82f7288, initial=<value optimized out>) at vm_insnhelper.c:1172
(gdb) p klass
$10 = 83947736
(gdb) rp klass
Cannot access memory at address 0x500f0d8
(gdb) p id
$11 = 12800
(gdb) rb_id2name id
$12 = 0x842ca48 "mu_pp"
(gdb) rp recv
T_STRING: "�jihgfedcba" bytesize:11 (embed) encoding:1 coderange:valid $13 = (struct RString *) 0x86e1894