Bug #5986: Segmentation Fault

• Status: Closed
• Assignee: nobu (Nobuyoshi Nakada)
• Target version: 1.9.3
• ruby -v: ruby 1.9.3p68 (2012-02-08 revision 34493) [x86_64-linux]

[levmatta (Luis Matta)]

Simply trying to render the home page of active-admin.

I have tested this on Ubuntu 10.04 LTS 64bits, using rvm ruby 1.9.3-head (with and without "rvm pkg install openssl"), and 1.9.2-head.
The structure: Nginx 1.0.11 (using ppa), RVM, Thin 1.3.1, Rails 3.2.1, ActiveAdmin 0.4, and stuff.
I am using SSL with a custom self-signed Certification Authority.

Thanks
(Since this broke my new production environment I have set it to Urgent - apologies if it is an abuse)

[naruse (Yui NARUSE)]

• Status changed from Open to Feedback

Could you make a self-contained small reproducible code?

[levmatta (Luis Matta)]

I can not, no code is running (besides ActiveAdmin Dashboard/Home -- and I have not Customized it), it is my project.
The login screen works, bug after that it crashes.

Maybe a plain ActiveAdmin+Rails3.2.1+Thin+Nginx project would crash, and I will test this.
Also the same code runs perfectly on WebBrick using the same ruby version on the development machines.

Sorry.
(Forgot to mention that I am using a Unix socket to comunicate between Nginx and Thin)

[naruse (Yui NARUSE)]

• Priority changed from 6 to 3

[levmatta (Luis Matta)]

• File AATest.7z AATest.7z added

This simple project fails (and I can share its code), and It makes me wonder if the failure is just that Ruby is allowing a stack overflow error cause a segmentation fault:

$ thin -V -D start

Using rack adapter
Thin web server (v1.3.1 codename Triple Espresso)
Debugging ON
Tracing ON
Maximum connections set to 1024
Listening on 0.0.0.0:3000, CTRL+C to stop
GET /admin HTTP/1.1
Host: localhost:3000
Connection: keep-alive
Cache-Control: max-age=0
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8
Referer: http://localhost:3000/admin
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8,pt-BR;q=0.6
Accept-Charset: UTF-8,*;q=0.5
Cookie: _AATest_session=BAh7CUkiD3Nlc3Npb25faWQGOgZFRkkiJTk5MDMwYWZmZWE2OTgwNjBmZTVkZTQxNzk1ODQ5MzYyBjsAVEkiEF9jc3JmX3Rva2VuBjsARkkiMTBEZHlTMnduNTM4N3htL2FUMEEwcmUrV2cya2dkVitZMFlPbFFkVS9FM289BjsARkkiH3dhcmRlbi51c2VyLmFkbWluX3VzZXIua2V5BjsAVFsISSIOQWRtaW5Vc2VyBjsARlsGaQZJIiIkMmEkMTAkYm1uNEZFN2p4RG9BN0NSamp1aW1XdQY7AFRJIgpmbGFzaAY7AEZvOiVBY3Rpb25EaXNwYXRjaDo6Rmxhc2g6OkZsYXNoSGFzaAk6CkB1c2VkbzoIU2V0BjoKQGhhc2h7BjoKYWxlcnRUOgxAY2xvc2VkRjoNQGZsYXNoZXN7BjsKSSIfWW91IGFyZSBhbHJlYWR5IHNpZ25lZCBpbi4GOwBUOglAbm93MA%3D%3D--38c24a3f709dec34d314247c336f4132de3a3557

HTTP/1.1 200 OK
Content-Type: text/html; charset=utf-8
X-UA-Compatible: IE=Edge
ETag: "84b316f2ca5bac58156ce0a5e6d7dc43"
Cache-Control: max-age=0, private, must-revalidate
Set-Cookie: _AATest_session=BAh7CEkiD3Nlc3Npb25faWQGOgZFRkkiJTk5MDMwYWZmZWE2OTgwNjBmZTVkZTQxNzk1ODQ5MzYyBjsAVEkiEF9jc3JmX3Rva2VuBjsARkkiMTBEZHlTMnduNTM4N3htL2FUMEEwcmUrV2cya2dkVitZMFlPbFFkVS9FM289BjsARkkiH3dhcmRlbi51c2VyLmFkbWluX3VzZXIua2V5BjsAVFsISSIOQWRtaW5Vc2VyBjsARlsGaQZJIiIkMmEkMTAkYm1uNEZFN2p4RG9BN0NSamp1aW1XdQY7AFQ%3D--bb7255eb79a5aa847599cd80a9c77664ad470fb1; path=/; HttpOnly
X-Request-Id: f51c7312667349ecf82a3460b860edeb
X-Runtime: 0.177047
Connection: close
Server: thin 1.3.1 codename Triple Espresso

!! Unexpected error while processing request: stack level too deep
stack level too deep
/home/levmatta/.rvm/gems/ruby-1.9.3-p0@play1/gems/activeadmin-0.4.0/lib/active_admin/arbre/html/element.rb:148

[levmatta (Luis Matta)]

Yui NARUSE wrote:

Could you make a self-contained small reproducible code?

Is the code I submitted OK? Do you need anything else ?

[naruse (Yui NARUSE)]

Luis Matta wrote:

Yui NARUSE wrote:

Could you make a self-contained small reproducible code?

Is the code I submitted OK? Do you need anything else ?

I can't reoroduced with following procedure on FreeBSD 9.0:

• wget https://bugs.ruby-lang.org/attachments/2442/AATest.7z
• 7z x AATest.7z
• cd AATest
• rvm install ruby-1.9.3-p0
• gem instal bundler
• bundle install
• thin -V -D start
• bundle install
• Access to /admin/ from web browser

Anyone can reproduce?

[levmatta (Luis Matta)]

Please notice that the login screen works, is the screen just after the login.
Standard User is : [e-mail]
Password: password

[yTrooper (Ygor Eduardo Bersani Pereira)]

I have the same problem on Ubuntu 11.10 64bits.
I tested the AATest project and got the same error.

[naruse (Yui NARUSE)]

Luis Matta wrote:

Please notice that the login screen works, is the screen just after the login.
Standard User is : [e-mail]
Password: password

I succeeded to reproduce with the login.
And I get the bottom of the backtrace of the segv as following.
Frames between 35852 and 35853 is odd because it should have event_callback on the middle of them.
This is not because of optimization of the compiler, because disas event_callback_wrapper shows
it doesn't call rb_funcall directly.

Anyway I doubt this is Third Party's Issue mainly EventMachine.

#35852 0x00000008009c8b8b in rb_funcall (recv=34493000200, mid=Variable "mid" is not available.
) at vm_eval.c:236
#35853 0x0000000800687f36 in event_callback_wrapper (a1=Variable "a1" is not available.
) at rubymain.cpp:162

...
#35821 0x00000008009d1e35 in exec_recursive_i (tag=Variable "tag" is not available.
) at thread.c:3940
#35822 0x00000008009d23ce in exec_recursive (func=0x8008ce0e0 <io_puts_ary>, obj=34410987160,
pairid=0, arg=34391503720, outer=0) at thread.c:3991
#35823 0x00000008008cdeda in rb_io_puts (argc=1, argv=Variable "argv" is not available.
) at io.c:6406
#35824 0x00000008008ce138 in io_puts_ary (ary=34410987480, out=34391503720, recur=1) at io.c:6363
#35825 0x00000008009d1e35 in exec_recursive_i (tag=Variable "tag" is not available.
) at thread.c:3940
#35826 0x00000008009d23ce in exec_recursive (func=0x8008ce0e0 <io_puts_ary>, obj=34410987480,
pairid=0, arg=34391503720, outer=0) at thread.c:3991
#35827 0x00000008008cdeda in rb_io_puts (argc=1, argv=Variable "argv" is not available.
) at io.c:6406
#35828 0x00000008009c7f73 in vm_call0 (th=0x801c18300, recv=Variable "recv" is not available.
) at vm_eval.c:79
#35829 0x00000008009ba210 in rb_funcall2 (recv=34391503720, mid=6192, argc=1, argv=0x801cf0338)
at vm_eval.c:236
#35830 0x00000008009bc7e2 in vm_call_method (th=0x801c18300, cfp=0x801def5b0, num=Variable "num" is
not available.
)
at vm_insnhelper.c:404
#35831 0x00000008009c2075 in vm_exec_core (th=0x801c18300, initial=Variable "initial" is not availab
le.
) at insns.def:1015
#35832 0x00000008009c6b2e in vm_exec (th=0x801c18300) at vm.c:1220
#35833 0x00000008009cb6dd in invoke_block_from_c (th=0x801c18300, block=0x82f3f5d80,
self=34493119480, argc=1, argv=Variable "argv" is not available.
) at vm.c:624
#35834 0x00000008009cbc54 in rb_yield (val=34492746840) at vm.c:654
#35835 0x00000008008757bc in rb_ary_each (array=Variable "array" is not available.
) at array.c:1478
#35836 0x00000008009bc7e2 in vm_call_method (th=0x801c18300, cfp=0x801def7c0, num=Variable "num" is
not available.
)
at vm_insnhelper.c:404
#35837 0x00000008009c2075 in vm_exec_core (th=0x801c18300, initial=Variable "initial" is not availab
le.
) at insns.def:1015
#35838 0x00000008009c6b2e in vm_exec (th=0x801c18300) at vm.c:1220
#35839 0x00000008009c81b2 in vm_call0 (th=0x801c18300, recv=34410946840, id=Variable "id" is not ava
ilable.
) at vm_eval.c:66
#35840 0x00000008009ba210 in rb_funcall2 (recv=34410946840, mid=384, argc=1, argv=0x7fffffff6860)
at vm_eval.c:236
#35841 0x00000008009bc4b3 in vm_method_missing (th=0x801c18300, id=108558, recv=34410946840, num=Var
iable "num" is not available.
)
at vm_insnhelper.c:458
#35842 0x00000008009bc960 in vm_call_method (th=0x801c18300, cfp=0x0, num=0, blockptr=0x82f3f5d80,
flag=270, id=Variable "id" is not available.
) at vm_insnhelper.c:677
#35843 0x00000008009c2075 in vm_exec_core (th=0x801c18300, initial=Variable "initial" is not availab
le.
) at insns.def:1015
#35844 0x00000008009c6b2e in vm_exec (th=0x801c18300) at vm.c:1220
#35845 0x00000008009c81b2 in vm_call0 (th=0x801c18300, recv=34410981200, id=Variable "id" is not ava
ilable.
) at vm_eval.c:66
#35846 0x00000008009ba210 in rb_funcall2 (recv=34410981200, mid=384, argc=1, argv=0x7fffffff6e10)
at vm_eval.c:236
#35847 0x00000008009bc4b3 in vm_method_missing (th=0x801c18300, id=108558, recv=34410981200, num=Var
iable "num" is not available.
)
at vm_insnhelper.c:458
#35848 0x00000008009bc960 in vm_call_method (th=0x801c18300, cfp=0x0, num=0, blockptr=0x801def9f8,
flag=0, id=Variable "id" is not available.
) at vm_insnhelper.c:677
#35849 0x00000008009c2075 in vm_exec_core (th=0x801c18300, initial=Variable "initial" is not availab
le.
) at insns.def:1015
#35850 0x00000008009c6b2e in vm_exec (th=0x801c18300) at vm.c:1220
#35851 0x00000008009c81b2 in vm_call0 (th=0x801c18300, recv=34493000200, id=Variable "id" is not ava
ilable.
) at vm_eval.c:66
#35852 0x00000008009c8b8b in rb_funcall (recv=34493000200, mid=Variable "mid" is not available.
) at vm_eval.c:236
#35853 0x0000000800687f36 in event_callback_wrapper (a1=Variable "a1" is not available.
) at rubymain.cpp:162

#35854 0x000000080068e238 in ConnectionDescriptor::_DispatchInboundData (this=0x82f4b4900, buffer=Va
riable "buffer" is not available.
)
at ed.cpp:770
#35855 0x000000080068e2cf in ConnectionDescriptor::Read (this=0x82f4b4900) at ed.cpp:718
#35856 0x000000080068fc5f in EventMachine_t::_RunSelectOnce (this=0x82faad000) at em.cpp:859
#35857 0x0000000800690bbb in EventMachine_t::_RunOnce (this=Variable "this" is not available.
) at em.cpp:455
#35858 0x0000000800694fcc in EventMachine_t::Run (this=0x82faad000) at em.cpp:432
#35859 0x00000008006879a9 in t_run_machine_without_threads (self=Variable "self" is not available.
) at rubymain.cpp:185
#35860 0x00000008009bc7e2 in vm_call_method (th=0x801c18300, cfp=0x801defbe0, num=Variable "num" is not available.
)
at vm_insnhelper.c:404
---Type to continue, or q to quit---
#35861 0x00000008009c2075 in vm_exec_core (th=0x801c18300, initial=Variable "initial" is not available.
) at insns.def:1015
#35862 0x00000008009c6b2e in vm_exec (th=0x801c18300) at vm.c:1220
#35863 0x00000008009c6f75 in rb_iseq_eval (iseqval=34405987000) at vm.c:1447
#35864 0x00000008008ad4bb in rb_load_internal (fname=34405995280, wrap=Variable "wrap" is not available.
) at load.c:310
#35865 0x00000008008ad621 in rb_f_load (argc=Variable "argc" is not available.
) at load.c:383
#35866 0x00000008009bc7e2 in vm_call_method (th=0x801c18300, cfp=0x801defef8, num=Variable "num" is not available.
)
at vm_insnhelper.c:404
#35867 0x00000008009c2075 in vm_exec_core (th=0x801c18300, initial=Variable "initial" is not available.
) at insns.def:1015
#35868 0x00000008009c6b2e in vm_exec (th=0x801c18300) at vm.c:1220
#35869 0x00000008009c6df7 in rb_iseq_eval_main (iseqval=34401265640) at vm.c:1461
#35870 0x00000008008aaa0f in ruby_exec_internal (n=0x80279a7e8) at eval.c:204
#35871 0x00000008008aaa39 in ruby_exec_node (n=0x80279a7e8) at eval.c:251
#35872 0x00000008008ac62f in ruby_run_node (n=0x80279a7e8) at eval.c:244
#35873 0x0000000000400902 in main (argc=5, argv=0x7fffffffcbd0) at main.c:38

[levmatta (Luis Matta)]

naruse is there any thing I should do:
"Anyway I doubt this is Third Party's Issue mainly EventMachine."
Is a confusing phrase, should I open a issue with EventMachine (or Thin) ?

[levmatta (Luis Matta)]

Only the newest prerelease version of EventMachine should work with ruby 1.9.2 and up.
So I tested it, with the same result:

cache: [GET /admin] miss
HTTP/1.1 200 OK
Content-Type: text/html; charset=utf-8
X-UA-Compatible: IE=Edge,chrome=1
ETag: "707e59ade3d46a333f374bfb6d7f39fb"
Cache-Control: must-revalidate, private, max-age=0
X-Request-Id: 15979549f7d7b4f18918d273c6e91bf3
X-Runtime: 0.097385
Date: Fri, 20 Apr 2012 21:51:34 GMT
X-Rack-Cache: miss
Connection: close
Server: thin 1.3.1 codename Triple Espresso

/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/activeadmin-0.4.3/lib/active_admin/arbre/html/element.rb:148: [BUG] Segmentation fault
ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-linux]

-- control frame ----------
c:0033 p:---- s:0110 b:0110 l:000109 d:000109 CFUNC :new
c:0032 p:0020 s:0106 b:0106 l:000105 d:000105 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/activeadmin-0.4.3/lib/active_admin/arbre/html/element.rb:148
c:0031 p:---- s:0103 b:0103 l:000102 d:000102 FINISH
c:0030 p:---- s:0101 b:0101 l:000100 d:000100 CFUNC :puts
c:0029 p:---- s:0099 b:0099 l:000098 d:000098 CFUNC :puts
c:0028 p:0033 s:0095 b:0095 l:000094 d:000094 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/logging.rb:28
c:0027 p:0040 s:0091 b:0091 l:000090 d:000090 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/logging.rb:35
c:0026 p:0009 s:0087 b:0087 l:000610 d:000086 BLOCK /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/connection.rb:105
c:0025 p:0008 s:0084 b:0084 l:0017c8 d:000083 BLOCK /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/response.rb:88
c:0024 p:---- s:0081 b:0081 l:000080 d:000080 FINISH
c:0023 p:---- s:0079 b:0079 l:000078 d:000078 CFUNC :each
c:0022 p:0015 s:0076 b:0076 l:000075 d:000075 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/activerecord-3.2.2/lib/active_record/query_cache.rb:46
c:0021 p:0019 s:0072 b:0072 l:000071 d:000071 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/activerecord-3.2.2/lib/active_record/connection_adapters/abstract/conne
c:0020 p:0017 s:0068 b:0068 l:000067 d:000067 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/body_proxy.rb:26
c:0019 p:---- s:0063 b:0063 l:000062 d:000062 FINISH
c:0018 p:0056 s:0061 b:0061 l:0017c8 d:0017c8 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/response.rb:88
c:0017 p:0404 s:0058 b:0058 l:000610 d:000610 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/connection.rb:104
c:0016 p:0094 s:0054 b:0054 l:000053 d:000053 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/connection.rb:53
c:0015 p:0036 s:0051 b:0051 l:000050 d:000050 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/connection.rb:38
c:0014 p:---- s:0046 b:0046 l:000045 d:000045 FINISH
c:0013 p:---- s:0044 b:0044 l:000043 d:000043 CFUNC :run_machine
c:0012 p:0248 s:0041 b:0041 l:000040 d:000040 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/eventmachine-1.0.0.beta.4/lib/eventmachine.rb:179
c:0011 p:0066 s:0034 b:0034 l:0003a0 d:0003a0 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/backends/base.rb:61
c:0010 p:0143 s:0030 b:0030 l:000029 d:000029 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/server.rb:159
c:0009 p:0545 s:0027 b:0027 l:001ea0 d:001ea0 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/controllers/controller.rb:86
c:0008 p:0283 s:0023 b:0023 l:000022 d:000022 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/runner.rb:185
c:0007 p:0037 s:0018 b:0018 l:000017 d:000017 METHOD /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/runner.rb:151
c:0006 p:0042 s:0015 b:0015 l:000014 d:000014 TOP /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/bin/thin:6
c:0005 p:---- s:0013 b:0013 l:000012 d:000012 FINISH
c:0004 p:---- s:0011 b:0011 l:000010 d:000010 CFUNC :load
c:0003 p:0127 s:0007 b:0007 l:001378 d:001fb0 EVAL /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/bin/thin:19
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:001378 d:001378 TOP

-- Ruby level backtrace information ----------------------------------------
/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/bin/thin:19:in <main>' /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/bin/thin:19:in load'
/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/bin/thin:6:in <top (required)>' /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/runner.rb:151:in run!'
/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/runner.rb:185:in run_command' /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/controllers/controller.rb:86:in start'
/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/server.rb:159:in start' /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/backends/base.rb:61:in start'
/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/eventmachine-1.0.0.beta.4/lib/eventmachine.rb:179:in run' /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/eventmachine-1.0.0.beta.4/lib/eventmachine.rb:179:in run_machine'
/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/connection.rb:38:in receive_data' /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/connection.rb:53:in process'
/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/connection.rb:104:in post_process' /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/response.rb:88:in each'
/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/body_proxy.rb:26:in method_missing' /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/activerecord-3.2.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:424:in each'
/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/activerecord-3.2.2/lib/active_record/query_cache.rb:46:in each' /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/activerecord-3.2.2/lib/active_record/query_cache.rb:46:in each'
/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/response.rb:88:in block in each' /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/connection.rb:105:in block in post_process'
/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/logging.rb:35:in trace' /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/logging.rb:28:in log'
/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/logging.rb:28:in puts' /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/thin-1.3.1/lib/thin/logging.rb:28:in puts'
/var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/activeadmin-0.4.3/lib/active_admin/arbre/html/element.rb:148:in to_ary' /var/www/WUEBA/production/shared/bundle/ruby/1.9.1/gems/activeadmin-0.4.3/lib/active_admin/arbre/html/element.rb:148:in new'

-- C level backtrace information -------------------------------------------
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_vm_bugreport+0x5f) [0x7fb247b288ff]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x63516) [0x7fb247a10516]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_bug+0xb3) [0x7fb247a106b3]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x10d2a5) [0x7fb247aba2a5]
/lib/libpthread.so.0(+0xf8f0) [0x7fb24779f8f0]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x176d5b) [0x7fb247b23d5b]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x16a303) [0x7fb247b17303]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x170589) [0x7fb247b1d589]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x171edc) [0x7fb247b1eedc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_check_funcall+0x170) [0x7fb247b1f370]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_check_convert_type+0xd7) [0x7fb247a5df27]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x138) [0x7fb247a35ae8]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
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/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x

[naruse (Yui NARUSE)]

levmatta (Luis Matta) wrote:

naruse is there any thing I should do:
"Anyway I doubt this is Third Party's Issue mainly EventMachine."
Is a confusing phrase, should I open a issue with EventMachine (or Thin) ?

I have no idea.

[mame (Yusuke Endoh)]

• Status changed from Feedback to Assigned
• Assignee set to nobu (Nobuyoshi Nakada)

Hello,

I cannot reproduce this, but I guess this is a bug of Ruby which is
triggered by a bug of active_admin.

Arbre::HTML::Element (which is defined in active_admin) defines #to_ary
wrongly, as the class does not mimic Array class.
https://github.com/gregbell/active_admin/blob/master/lib/active_admin/arbre/html/element.rb#L147

def to_ary
Collection.new [self]
end

(The Collection class inherits Array)

And, an instance of the class is passed to Kernel.puts, which cause a bug.

In short, this is considered like the following small code:

class Foo
def to_ary
Array.new [self]
end
end
puts Foo.new

(This code does not cause SEGV in my 32 bit system, but naruse said
it does in x86_64)

This causes infinite recursion, which leads to stack overflow.
This behavior can be also observed in the following stack trace:

/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x88cdd) [0x7fb247a35cdd]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17da08) [0x7fb247b2aa08]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(+0x17e7dc) [0x7fb247b2b7dc]
/usr/local/rvm/rubies/ruby-1.9.2-p290/lib/libruby.so.1.9(rb_io_puts+0x157) [0x7fb247a35b07]

Because rb_io_puts (the implementation of IO#puts) uses rb_exec_recursive,
the infinite recursion should be detected.
So, I guess there is something wrong in rb_exec_recursive.

Nobu, please check it.

--
Yusuke Endoh [e-mail]

[levmatta (Luis Matta)]

Thanks Yusuke.
I have notified the ActiveAdmin project (https://github.com/gregbell/active_admin/issues/1269) and I have closed the issue at EventMachine (https://github.com/eventmachine/eventmachine/issues/318).
Chears.

[nobu (Nobuyoshi Nakada)]

Since that to_ary method creates new arrays for each time, rb_exec_recursive() can't catch it.

[nobu (Nobuyoshi Nakada)]

• Status changed from Assigned to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r38120.
Luis, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

io.c: recurse for the argument

• io.c (rb_io_puts): recurse for the argument itself, not converted
  array elements. [ruby-core:42444] [Bug #5986]