Bug #8874: libruby.so.2.0 variable.c segmentation faults in production with rails (ruby-2.0.0-p247)

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: 2.0.0-p247

[odog (Owen Tran)]

Recently upgraded rails application from ruby-2.0.0-p195 to ruby-2.0.0-p247 and seeing frequent segmentation faults now when rails action-4.0.0 calls the inspect method which loops through all the variables.

/var/www/pointshound/shared/bundle/ruby/2.0.0/gems/actionpack-4.0.0/lib/action_dispatch/request/session.rb:132: [BUG] Segmentation fault
ruby 2.0.0p247 (2013-06-27 revision 41674) [i686-linux]

-- C level backtrace information -------------------------------------------
/home/pointshound/.rvm/rubies/ruby-2.0.0-p247/lib/libruby.so.2.0(+0x1aefb0) [0xb76effb0] vm_dump.c:647
/home/pointshound/.rvm/rubies/ruby-2.0.0-p247/lib/libruby.so.2.0(+0x5bf4d) [0xb759cf4d] error.c:283
/home/pointshound/.rvm/rubies/ruby-2.0.0-p247/lib/libruby.so.2.0(rb_bug+0x40) [0xb759dc90] error.c:302
/home/pointshound/.rvm/rubies/ruby-2.0.0-p247/lib/libruby.so.2.0(+0x12f51d) [0xb767051d] signal.c:672
[0xf57fe40c]
/home/pointshound/.rvm/rubies/ruby-2.0.0-p247/lib/libruby.so.2.0(rb_ivar_count+0xe8) [0xb76b9cd8] variable.c:1303
/home/pointshound/.rvm/rubies/ruby-2.0.0-p247/lib/libruby.so.2.0(+0xbef06) [0xb75fff06] object.c:498
/home/pointshound/.rvm/rubies/ruby-2.0.0-p247/lib/libruby.so.2.0(+0x1954fe) [0xb76d64fe] vm_insnhelper.c:1331
/home/pointshound/.rvm/rubies/ruby-2.0.0-p247/lib/libruby.so.2.0(+0x1a3670) [0xb76e4670] vm_eval.c:117
/home/pointshound/.rvm/rubies/ruby-2.0.0-p247/lib/libruby.so.2.0(rb_funcall+0xc7) [0xb76e6057] vm_eval.c:49
/home/pointshound/.rvm/rubies/ruby-2.0.0-p247/lib/libruby.so.2.0(rb_inspect+0x40) [0xb7600df0] object.c:404

(full crash.log attached)

Not quite sure how to reproduce, other than letting it run in production until it hits this segfault. Right now, restarting application whenever this happens but impacts stability.

[nagachika (Tomoyuki Chikanaga)]

• Tracker changed from Backport to Bug
• Project changed from Backport200 to Ruby master

[hsbt (Hiroshi SHIBATA)]

• Status changed from Open to Feedback
• ruby -v set to 2.0.0-p247

Please feedback to run your code with ruby-trunk.

[jeremyevans0 (Jeremy Evans)]

• Status changed from Feedback to Closed