Segmentation fault in rails / activesupport 3.1 and ruby 1.9.2

Question

I upgraded a rails application to rails 3.1 (rc4) and now get random segmentation faults in activesupport. These faults happen when starting the application (rails s) or running tests (e.g. rake spec). The weird thing is that:

• Sometimes all goes well and the segmentation fault does not happen

• When the fault happens, it is always in activesupport, but not always in the same part of it. See below for three different outputs:

• /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc /lib/active_support/core_ext/class/attribute.rb:66: [BUG] Segmentation fault -/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/core_ext/module/remove_method.rb:3: [BUG] Segmentation fault

• /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/core_ext/module/introspection.rb:79: [BUG] Segmentation fault

I'm not sure what the source of this problem is. Does anybody have an idea? Below is the full log for the first of the three shown above:

$ rails s
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/core_ext/class/attribute.rb:88: [BUG] Segmentation fault
ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-linux]

-- control frame ----------
c:0043 p:0076 s:0123 b:0123 l:000104 d:000122 EVAL   /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/core_ext/class/attribute.rb:88
c:0042 p:---- s:0121 b:0121 l:000120 d:000120 FINISH
c:0041 p:---- s:0119 b:0119 l:000118 d:000118 CFUNC  :class_eval
c:0040 p:0129 s:0113 b:0113 l:000104 d:000112 BLOCK  /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/core_ext/class/attribute.rb:66
c:0039 p:---- s:0110 b:0110 l:000109 d:000109 FINISH
c:0038 p:---- s:0108 b:0108 l:000107 d:000107 CFUNC  :each
c:0037 p:0055 s:0105 b:0105 l:000104 d:000104 METHOD /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/core_ext/class/attribute.rb:65
c:0036 p:0011 s:0100 b:0100 l:000e98 d:000099 BLOCK  /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.rc4/lib/abstract_controller/layouts.rb:168
c:0035 p:---- s:0098 b:0098 l:000097 d:000097 FINISH
c:0034 p:---- s:0096 b:0096 l:000095 d:000095 CFUNC  :class_eval
c:0033 p:0169 s:0093 b:0093 l:000092 d:000092 METHOD /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/concern.rb:122
c:0032 p:---- s:0089 b:0089 l:000088 d:000088 FINISH
c:0031 p:---- s:0087 b:0087 l:000086 d:000086 CFUNC  :include
c:0030 p:0012 s:0083 b:0083 l:000074 d:000082 BLOCK  /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.rc4/lib/action_controller/base.rb:226
c:0029 p:---- s:0080 b:0080 l:000079 d:000079 FINISH
c:0028 p:---- s:0078 b:0078 l:000077 d:000077 CFUNC  :each
c:0027 p:0276 s:0075 b:0075 l:000074 d:000074 CLASS  /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.rc4/lib/action_controller/base.rb:225
c:0026 p:0017 s:0073 b:0073 l:000072 d:000072 CLASS  /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.rc4/lib/action_controller/base.rb:169
c:0025 p:0021 s:0071 b:0071 l:000070 d:000070 TOP    /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.rc4/lib/action_controller/base.rb:3
c:0024 p:---- s:0069 b:0069 l:000068 d:000068 FINISH
c:0023 p:0266 s:0067 b:0067 l:000066 d:000066 TOP    /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/meta_search-1.1.0.pre/lib/meta_search.rb:59
c:0022 p:---- s:0065 b:0065 l:000064 d:000064 FINISH
c:0021 p:---- s:0063 b:0063 l:000062 d:000062 CFUNC  :require
c:0020 p:0026 s:0059 b:0059 l:000040 d:000058 BLOCK  /home/corne/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/lib/bundler/runtime.rb:68
c:0019 p:---- s:0056 b:0056 l:000055 d:000055 FINISH
c:0018 p:---- s:0054 b:0054 l:000053 d:000053 CFUNC  :each
c:0017 p:0091 s:0051 b:0051 l:000040 d:000050 BLOCK  /home/corne/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/lib/bundler/runtime.rb:66
c:0016 p:---- s:0046 b:0046 l:000045 d:000045 FINISH
c:0015 p:---- s:0044 b:0044 l:000043 d:000043 CFUNC  :each
c:0014 p:0046 s:0041 b:0041 l:000040 d:000040 METHOD /home/corne/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/lib/bundler/runtime.rb:55
c:0013 p:0021 s:0037 b:0037 l:000036 d:000036 METHOD /home/corne/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/lib/bundler.rb:120
c:0012 p:0079 s:0033 b:0033 l:000032 d:000032 TOP    /home/corne/X/projecten/ProjectX/config/application.rb:7
c:0011 p:---- s:0031 b:0031 l:000030 d:000030 FINISH
c:0010 p:---- s:0029 b:0029 l:000028 d:000028 CFUNC  :require
c:0009 p:0016 s:0025 b:0025 l:000016 d:000024 BLOCK  /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.0.rc4/lib/rails/commands.rb:52
c:0008 p:---- s:0022 b:0022 l:000021 d:000021 FINISH
c:0007 p:---- s:0020 b:0020 l:000019 d:000019 CFUNC  :tap
c:0006 p:0721 s:0017 b:0017 l:000016 d:000016 TOP    /home/corne/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.0.rc4/lib/rails/commands.rb:49
c:0005 p:---- s:0012 b:0012 l:000011 d:000011 FINISH
c:0004 p:---- s:0010 b:0010 l:000009 d:000009 CFUNC  :require
c:0003 p:0061 s:0006 b:0006 l:001598 d:001a18 EVAL   script/rails:6
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:001598 d:001598 TOP   
---------------------------
-- Ruby level backtrace information ----------------------------------------
script/rails:6:in `'
script/rails:6:in `require'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.0.rc4/lib/rails/commands.rb:49:in `'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.0.rc4/lib/rails/commands.rb:49:in `tap'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.0.rc4/lib/rails/commands.rb:52:in `block in '
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.0.rc4/lib/rails/commands.rb:52:in `require'
/home/corne/X/projecten/ProjectX/config/application.rb:7:in `'
/home/corne/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/lib/bundler.rb:120:in `require'
/home/corne/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/lib/bundler/runtime.rb:55:in `require'
/home/corne/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/lib/bundler/runtime.rb:55:in `each'
/home/corne/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/lib/bundler/runtime.rb:66:in `block in require'
/home/corne/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/lib/bundler/runtime.rb:66:in `each'
/home/corne/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
/home/corne/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/lib/bundler/runtime.rb:68:in `require'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/meta_search-1.1.0.pre/lib/meta_search.rb:59:in `'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.rc4/lib/action_controller/base.rb:3:in `'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.rc4/lib/action_controller/base.rb:169:in `'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.rc4/lib/action_controller/base.rb:225:in `'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.rc4/lib/action_controller/base.rb:225:in `each'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.rc4/lib/action_controller/base.rb:226:in `block in '
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.rc4/lib/action_controller/base.rb:226:in `include'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/concern.rb:122:in `append_features'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/concern.rb:122:in `class_eval'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.rc4/lib/abstract_controller/layouts.rb:168:in `block in '
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/core_ext/class/attribute.rb:65:in `class_attribute'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/core_ext/class/attribute.rb:65:in `each'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/core_ext/class/attribute.rb:66:in `block in class_attribute'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/core_ext/class/attribute.rb:66:in `class_eval'
/home/corne/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.rc4/lib/active_support/core_ext/class/attribute.rb:88:in `block in class_attribute'

-- C level backtrace information -------------------------------------------
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_vm_bugreport+0x5f) [0x7f09c4c8fcaf]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x5ff7e) [0x7f09c4b6ef7e]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_bug+0xa2) [0x7f09c4b6fea2]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1140f5) [0x7f09c4c230f5]
/lib/x86_64-linux-gnu/libpthread.so.0(+0xfc60) [0x7f09c4900c60]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(st_clear+0x43) [0x7f09c4c2ac83]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(st_free_table+0x9) [0x7f09c4c2acd9]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x7be87) [0x7f09c4b8ae87]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x7c6c8) [0x7f09c4b8b6c8]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17d0ad) [0x7f09c4c8c0ad]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_add_method+0x34) [0x7f09c4c8c844]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17db5a) [0x7f09c4c8cb5a]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17dc8c) [0x7f09c4c8cc8c]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17aaa6) [0x7f09c4c89aa6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1705ae) [0x7f09c4c7f5ae]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1769a3) [0x7f09c4c859a3]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x176d47) [0x7f09c4c85d47]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17b330) [0x7f09c4c8a330]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17aaa6) [0x7f09c4c89aa6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1705ae) [0x7f09c4c7f5ae]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1769a3) [0x7f09c4c859a3]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_yield+0x47) [0x7f09c4c8a977]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_ary_each+0x46) [0x7f09c4b3e4f6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17aaa6) [0x7f09c4c89aa6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1705ae) [0x7f09c4c7f5ae]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1769a3) [0x7f09c4c859a3]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17b1a5) [0x7f09c4c8a1a5]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17b23e) [0x7f09c4c8a23e]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17aaa6) [0x7f09c4c89aa6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1705ae) [0x7f09c4c7f5ae]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1769a3) [0x7f09c4c859a3]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x177c44) [0x7f09c4c86c44]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_funcall+0xc6) [0x7f09c4c878c6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x660a2) [0x7f09c4b750a2]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17aaa6) [0x7f09c4c89aa6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1705ae) [0x7f09c4c7f5ae]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1769a3) [0x7f09c4c859a3]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_yield+0x47) [0x7f09c4c8a977]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_ary_each+0x46) [0x7f09c4b3e4f6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17aaa6) [0x7f09c4c89aa6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1705ae) [0x7f09c4c7f5ae]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1769a3) [0x7f09c4c859a3]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_iseq_eval+0x1f0) [0x7f09c4c8ae90]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x69b26) [0x7f09c4b78b26]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_require_safe+0x6df) [0x7f09c4b7a08f]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_autoload_load+0xa5) [0x7f09c4c645a5]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x155621) [0x7f09c4c64621]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x16de4d) [0x7f09c4c7ce4d]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x16fc2c) [0x7f09c4c7ec2c]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1769a3) [0x7f09c4c859a3]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_iseq_eval+0x1f0) [0x7f09c4c8ae90]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x69b26) [0x7f09c4b78b26]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_require_safe+0x6df) [0x7f09c4b7a08f]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17aaa6) [0x7f09c4c89aa6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1705ae) [0x7f09c4c7f5ae]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1769a3) [0x7f09c4c859a3]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_yield+0x47) [0x7f09c4c8a977]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_ary_each+0x46) [0x7f09c4b3e4f6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17aaa6) [0x7f09c4c89aa6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1705ae) [0x7f09c4c7f5ae]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1769a3) [0x7f09c4c859a3]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_yield+0x47) [0x7f09c4c8a977]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_ary_each+0x46) [0x7f09c4b3e4f6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17aaa6) [0x7f09c4c89aa6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1705ae) [0x7f09c4c7f5ae]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1769a3) [0x7f09c4c859a3]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_iseq_eval+0x1f0) [0x7f09c4c8ae90]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x69b26) [0x7f09c4b78b26]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_require_safe+0x6df) [0x7f09c4b7a08f]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17aaa6) [0x7f09c4c89aa6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1705ae) [0x7f09c4c7f5ae]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1769a3) [0x7f09c4c859a3]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_yield+0x47) [0x7f09c4c8a977]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_obj_tap+0x9) [0x7f09c4bbeb79]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17aaa6) [0x7f09c4c89aa6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1705ae) [0x7f09c4c7f5ae]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1769a3) [0x7f09c4c859a3]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_iseq_eval+0x1f0) [0x7f09c4c8ae90]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x69b26) [0x7f09c4b78b26]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_require_safe+0x6df) [0x7f09c4b7a08f]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x17aaa6) [0x7f09c4c89aa6]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1705ae) [0x7f09c4c7f5ae]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x1769a3) [0x7f09c4c859a3]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_iseq_eval_main+0xb1) [0x7f09c4c8af91]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(+0x663da) [0x7f09c4b753da]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(ruby_exec_node+0x1d) [0x7f09c4b7633d]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(ruby_run_node+0x1e) [0x7f09c4b7854e]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/bin/ruby(main+0x4b) [0x40095b]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xff) [0x7f09c3cb1eff]
/home/corne/.rvm/rubies/ruby-1.9.2-p180/bin/ruby() [0x400849]

[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
For details: http://www.ruby-lang.org/bugreport.html

Aborted

Answer 1

It turns out that the combination of devise (1.3.4) and meta_search (1.1.0.pre) results in these segmentation faults. Disabling one of them "solves" the problem. The root cause is either in one of these gems or in ruby itself. See this ruby issue.