# Test/ruby/test\_m17n.rb dumps core

**URL:** <https://www.ruby-forum.com/t/test-ruby-test-m17n-rb-dumps-core/161601>\
**Category:** Development\
**Created:** [February 27, 2009, 7:00pm UTC](https://www.ruby-forum.com/t/test-ruby-test-m17n-rb-dumps-core/161601 "2009-02-27T19:00:59Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Yukihiro\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/c57346/32.png) [@Yukihiro\_M](https://www.ruby-forum.com/u/Yukihiro_M)\
**Post date:** [February 27, 2009, 7:00pm UTC](https://www.ruby-forum.com/t/test-ruby-test-m17n-rb-dumps-core/161601/1 "2009-02-27T19:00:59Z")

</div>

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=) 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=) 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: “Èjihgfedcba” bytesize:11 (embed) encoding:1 coderange:valid  
$13 = (struct RString \*) 0x86e1894

---

<div class="post-metadata">

**Author:** ![Yukihiro\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/c57346/32.png) [@Yukihiro\_M](https://www.ruby-forum.com/u/Yukihiro_M)\
**Post date:** [March 2, 2009, 11:48am UTC](https://www.ruby-forum.com/t/test-ruby-test-m17n-rb-dumps-core/161601/2 "2009-03-02T11:48:06Z")

</div>

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In message “Re: [ruby-dev:38106] test/ruby/test\_m17n.rb dumps core”  
on Sat, 28 Feb 2009 02:58:59 +0900, Yukihiro M.  
[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes:

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