[ruby-core:38375] [Ruby 1.9 - Bug #5047] Segfault (most likely involving require)

Issue #5047 has been updated by Hiroshi Nakamura.


Can someone enlighten me to find the bug?

Here's a way to replicate the bug. 4 steps. I'm on Ubuntu 11.04 64bit.
----
# 1. extract the attached app
% unzip segfault.zip
% cd segfault

# 2. install bundler via rubygems
% gem install bundler --user-install
% export PATH=$PATH:/home/nahi/.gem/ruby/1.9.1/bin

# 3. run bundle to install gems to ./ruby
% bundle install --path=.

# 4. execute it
% ruby -rbundler -e 'Bundler.setup; require "rspec/core"; RSpec::Core::Runner.run(["spec"], $stderr, $stdout)'
----

And here's my gdb session.
----
% gdb /usr/local/bin/ruby
GNU gdb (Ubuntu/Linaro 7.2-1ubuntu11) 7.2
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/local/bin/ruby...done.
(gdb) run -rbundler -e 'Bundler.setup; require "rspec/core"; RSpec::Core::Runner.run(["spec"], $stderr, $stdout)'
Starting program: /usr/local/bin/ruby -rbundler -e 'Bundler.setup; require "rspec/core"; RSpec::Core::Runner.run(["spec"], $stderr, $stdout)'
[Thread debugging using libthread_db enabled]
[New Thread 0x7ffff6682700 (LWP 13255)]
[Thread 0x7ffff6682700 (LWP 13255) exited]
[New Thread 0x7ffff6682700 (LWP 13257)]

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7ab5c99 in st_foreach (table=0x28b5020, func=0x7ffff7a0c230 <mark_entry>, arg=140737488315296) at ../st.c:745
745	            key = (st_data_t)table->bins[i*2];
(gdb) where
#0  0x00007ffff7ab5c99 in st_foreach (table=0x28b5020, func=0x7ffff7a0c230 <mark_entry>, arg=140737488315296) at ../st.c:745
#1  0x00007ffff7a0be88 in mark_tbl (objspace=0x6038a0, ptr=19563040, lev=5) at ../gc.c:1445
#2  gc_mark_children (objspace=0x6038a0, ptr=19563040, lev=5) at ../gc.c:1801
#3  0x00007ffff7a0b8d8 in gc_mark_children (objspace=0x6038a0, ptr=35333200, lev=4) at ../gc.c:1795
#4  0x00007ffff7a0b8d8 in gc_mark_children (objspace=0x6038a0, ptr=35333280, lev=3) at ../gc.c:1795
#5  0x00007ffff7a0c1d6 in mark_const_entry_i (key=<value optimized out>, ce=<value optimized out>, data=<value optimized out>)
    at ../gc.c:1562
#6  0x00007ffff7ab5d1c in st_foreach (table=0x19131a0, func=0x7ffff7a0c1c0 <mark_const_entry_i>, arg=140737488315616)
    at ../st.c:787
#7  0x00007ffff7a0bead in mark_const_tbl (objspace=0x6038a0, ptr=10364280, lev=2) at ../gc.c:1573
#8  gc_mark_children (objspace=0x6038a0, ptr=10364280, lev=2) at ../gc.c:1802
#9  0x00007ffff7a0bb7e in gc_mark_children (objspace=0x6038a0, ptr=27521040, lev=1) at ../gc.c:1688
#10 0x00007ffff7b02bb5 in iseq_mark (ptr=0x2398250) at ../iseq.c:106
#11 0x00007ffff7a0baba in gc_mark_children (objspace=0x6038a0, ptr=30252840, lev=3) at ../gc.c:1839
#12 0x00007ffff7a0c2c8 in mark_method_entry (key=<value optimized out>, me=<value optimized out>, data=<value optimized out>)
    at ../gc.c:1506
#13 mark_method_entry_i (key=<value optimized out>, me=<value optimized out>, data=<value optimized out>) at ../gc.c:1530
#14 0x00007ffff7ab5d1c in st_foreach (table=0x23d4f70, func=0x7ffff7a0c270 <mark_method_entry_i>, arg=140737488315968)
    at ../st.c:787
#15 0x00007ffff7a0be59 in mark_m_tbl (objspace=0x6038a0, ptr=21024760, lev=2) at ../gc.c:1541
#16 gc_mark_children (objspace=0x6038a0, ptr=21024760, lev=2) at ../gc.c:1800
#17 0x00007ffff7a0b8d8 in gc_mark_children (objspace=0x6038a0, ptr=41607400, lev=1) at ../gc.c:1795
#18 0x00007ffff7a0df82 in mark_locations_array (start=<value optimized out>, end=<value optimized out>) at ../gc.c:1401
#19 gc_mark_locations (start=<value optimized out>, end=<value optimized out>) at ../gc.c:1414
#20 rb_gc_mark_locations (start=<value optimized out>, end=<value optimized out>) at ../gc.c:1420
#21 0x00007ffff7b0768e in env_mark (ptr=0x2bfda70) at ../vm.c:238
#22 0x00007ffff7a0baba in gc_mark_children (objspace=0x6038a0, ptr=41607040, lev=1) at ../gc.c:1839
#23 0x00007ffff7a0df82 in mark_locations_array (start=<value optimized out>, end=<value optimized out>) at ../gc.c:1401
#24 gc_mark_locations (start=<value optimized out>, end=<value optimized out>) at ../gc.c:1414
#25 rb_gc_mark_locations (start=<value optimized out>, end=<value optimized out>) at ../gc.c:1420
#26 0x00007ffff7b0768e in env_mark (ptr=0x2562950) at ../vm.c:238
#27 0x00007ffff7a0baba in gc_mark_children (objspace=0x6038a0, ptr=41607000, lev=1) at ../gc.c:1839
#28 0x00007ffff79fc9d5 in proc_mark (ptr=0x277bf80) at ../proc.c:53
#29 0x00007ffff7a0baba in gc_mark_children (objspace=0x6038a0, ptr=41606920, lev=2) at ../gc.c:1839
#30 0x00007ffff7a0c2fc in mark_method_entry (key=<value optimized out>, me=<value optimized out>, data=<value optimized out>)
    at ../gc.c:1509
#31 mark_method_entry_i (key=<value optimized out>, me=<value optimized out>, data=<value optimized out>) at ../gc.c:1530
#32 0x00007ffff7ab5d1c in st_foreach (table=0x25b2070, func=0x7ffff7a0c270 <mark_method_entry_i>, arg=140737488316608)
    at ../st.c:787
#33 0x00007ffff7a0be59 in mark_m_tbl (objspace=0x6038a0, ptr=33366880, lev=1) at ../gc.c:1541
#34 gc_mark_children (objspace=0x6038a0, ptr=33366880, lev=1) at ../gc.c:1800
#35 0x00007ffff7b02ba5 in iseq_mark (ptr=0x27528f0) at ../iseq.c:107
#36 0x00007ffff7a0baba in gc_mark_children (objspace=0x6038a0, ptr=33147080, lev=2) at ../gc.c:1839
#37 0x00007ffff7a0be2b in gc_mark_children (objspace=0x6038a0, ptr=<value optimized out>, lev=1) at ../gc.c:1815
#38 0x00007ffff7b02bf5 in iseq_mark (ptr=0x27520f0) at ../iseq.c:102
#39 0x00007ffff7a0baba in gc_mark_children (objspace=0x6038a0, ptr=33147560, lev=2) at ../gc.c:1839
#40 0x00007ffff7a0be2b in gc_mark_children (objspace=0x6038a0, ptr=<value optimized out>, lev=1) at ../gc.c:1815
#41 0x00007ffff7b02bf5 in iseq_mark (ptr=0x2751db0) at ../iseq.c:102
#42 0x00007ffff7a0baba in gc_mark_children (objspace=0x6038a0, ptr=33148280, lev=5) at ../gc.c:1839
#43 0x00007ffff7a0c2c8 in mark_method_entry (key=<value optimized out>, me=<value optimized out>, data=<value optimized out>)
    at ../gc.c:1506
#44 mark_method_entry_i (key=<value optimized out>, me=<value optimized out>, data=<value optimized out>) at ../gc.c:1530
#45 0x00007ffff7ab5d1c in st_foreach (table=0x27e52d0, func=0x7ffff7a0c270 <mark_method_entry_i>, arg=140737488317232)
---Type <return> to continue, or q <return> to quit---quit
 at ../st.Quit
(gdb) up 2
#2  gc_mark_children (objspace=0x6038a0, ptr=19563040, lev=5) at ../gc.c:1801
1801		mark_tbl(objspace, RCLASS_IV_TBL(obj), lev);
(gdb) p *obj
$1 = {as = {free = {flags = 4130, next = 0x665b20}, basic = {flags = 4130, klass = 6708000}, object = {basic = {flags = 4130, 
        klass = 6708000}, as = {heap = {numiv = 42751520, ivptr = 0x2af3720, iv_index_tbl = 0x0}, ary = {42751520, 45037344, 
          0}}}, klass = {basic = {flags = 4130, klass = 6708000}, ptr = 0x28c5620, m_tbl = 0x2af3720, iv_index_tbl = 0x0}, 
    flonum = {basic = {flags = 4130, klass = 6708000}, float_value = 2.1122057339494968e-316}, string = {basic = {
        flags = 4130, klass = 6708000}, as = {heap = {len = 42751520, ptr = 0x2af3720 "\340\263\333\367\377\177", aux = {
            capa = 0, shared = 0}}, ary = " V\214\002\000\000\000\000 7\257\002", '\000' <repeats 11 times>}}, array = {
      basic = {flags = 4130, klass = 6708000}, as = {heap = {len = 42751520, aux = {capa = 45037344, shared = 45037344}, 
          ptr = 0x0}, ary = {42751520, 45037344, 0}}}, regexp = {basic = {flags = 4130, klass = 6708000}, ptr = 0x28c5620, 
      src = 45037344, usecnt = 0}, hash = {basic = {flags = 4130, klass = 6708000}, ntbl = 0x28c5620, iter_lev = 45037344, 
      ifnone = 0}, data = {basic = {flags = 4130, klass = 6708000}, dmark = 0x28c5620, dfree = 0x2af3720, data = 0x0}, 
    typeddata = {basic = {flags = 4130, klass = 6708000}, type = 0x28c5620, typed_flag = 45037344, data = 0x0}, rstruct = {
      basic = {flags = 4130, klass = 6708000}, as = {heap = {len = 42751520, ptr = 0x2af3720}, ary = {42751520, 45037344, 
          0}}}, bignum = {basic = {flags = 4130, klass = 6708000}, as = {heap = {len = 42751520, digits = 0x2af3720}, ary = {
          42751520, 0, 45037344, 0, 0, 0}}}, file = {basic = {flags = 4130, klass = 6708000}, fptr = 0x28c5620}, node = {
      flags = 4130, nd_reserved = 6708000, u1 = {node = 0x28c5620, id = 42751520, value = 42751520, cfunc = 0x28c5620, 
        tbl = 0x28c5620}, u2 = {node = 0x2af3720, id = 45037344, argc = 45037344, value = 45037344}, u3 = {node = 0x0, id = 0, 
        state = 0, entry = 0x0, cnt = 0, value = 0}}, match = {basic = {flags = 4130, klass = 6708000}, str = 42751520, 
      rmatch = 0x2af3720, regexp = 0}, rational = {basic = {flags = 4130, klass = 6708000}, num = 42751520, den = 45037344}, 
    complex = {basic = {flags = 4130, klass = 6708000}, real = 42751520, imag = 45037344}}}
(gdb) p 4130 & 0x1f
$2 = 2
(gdb) p obj.as.klass
$3 = {basic = {flags = 4130, klass = 6708000}, ptr = 0x28c5620, m_tbl = 0x2af3720, iv_index_tbl = 0x0}
(gdb) p obj.as.klass.m_tbl
$4 = (struct st_table *) 0x2af3720
(gdb) p *obj.as.klass.m_tbl
$5 = {type = 0x7ffff7dbb3e0, num_bins = 11, entries_packed = 1, num_entries = 0, bins = 0x28c1730, head = 0x0, tail = 0x0}
(gdb) p obj.as.klass.m_tbl.bins[0]
$6 = (struct st_table_entry *) 0x0
(gdb) 
----
----------------------------------------
Bug #5047: Segfault (most likely involving require)
http://redmine.ruby-lang.org/issues/5047

Author: Jack Christensen
Status: Assigned
Priority: High
Assignee: Hiroshi Nakamura
Category: core
Target version: 1.9.3
ruby -v: ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-linux]


Rails application randomly segfaults when running rspec. It will segfault about 80% of the time before any specs run. It seems to be related to requiring files. If it succeeds in getting to any specs it will run all of them without segfaulting.

The catalyst for the segfault seems to be the prawn gem. I have tested several rails applications where adding prawn to the Gemfile crashes them. However, there need to be certain other gems in place as well.

<pre>
source 'http://rubygems.org'

gem 'rails', '3.1.0.rc4'

gem 'tiny_tds'
gem 'activerecord-sqlserver-adapter', :git => 'git://github.com/rails-sqlserver/activerecord-sqlserver-adapter.git'

group :test do
  gem 'rspec-rails', '>= 2.6.0'
end

gem "prawn"
</pre>

This Gemfile will crash most of the time when running bundle exec rspec spec. If I replace the tiny_tds and activerecord-sql-server-adapter with sqlite3 it does not crash. But I do not believe the fault is with the SQL server gems as in my other rails projects I am using the pg gem and they also crash.

Another interesting point is the order of the Gemfile matters. If I move the prawn gem to the top of the Gemfile the segfaults do not occur.

The crashes occur at multiple locations, but the most most common is: activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237.

I've put a whole stack dump below.

<pre>
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237: [BUG] Segmentation fault
ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-linux]

-- control frame ----------
c:0042 p:---- s:0143 b:0143 l:000142 d:000142 CFUNC  :require
c:0041 p:0012 s:0139 b:0139 l:000131 d:000138 BLOCK  /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237
c:0040 p:0054 s:0137 b:0137 l:000136 d:000136 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:225
c:0039 p:0013 s:0132 b:0132 l:000131 d:000131 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237
c:0038 p:0119 s:0127 b:0127 l:000126 d:000126 TOP    /usr/local/lib/ruby/gems/1.9.1/gems/rspec-mocks-2.6.0/lib/rspec/mocks/framework.rb:14
c:0037 p:---- s:0125 b:0125 l:000124 d:000124 FINISH
c:0036 p:---- s:0123 b:0123 l:000122 d:000122 CFUNC  :require
c:0035 p:0012 s:0119 b:0119 l:000111 d:000118 BLOCK  /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237
c:0034 p:0054 s:0117 b:0117 l:000116 d:000116 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:225
c:0033 p:0013 s:0112 b:0112 l:000111 d:000111 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237
c:0032 p:0011 s:0107 b:0107 l:000106 d:000106 TOP    /usr/local/lib/ruby/gems/1.9.1/gems/rspec-mocks-2.6.0/lib/rspec/mocks.rb:1
c:0031 p:---- s:0105 b:0105 l:000104 d:000104 FINISH
c:0030 p:---- s:0103 b:0103 l:000102 d:000102 CFUNC  :require
c:0029 p:0012 s:0099 b:0099 l:000091 d:000098 BLOCK  /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237
c:0028 p:0054 s:0097 b:0097 l:000096 d:000096 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:225
c:0027 p:0013 s:0092 b:0092 l:000091 d:000091 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237
c:0026 p:0011 s:0087 b:0087 l:000086 d:000086 TOP    /usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/mocking/with_rspec.rb:1
c:0025 p:---- s:0085 b:0085 l:000084 d:000084 FINISH
c:0024 p:---- s:0083 b:0083 l:000082 d:000082 CFUNC  :require
c:0023 p:0012 s:0079 b:0079 l:000071 d:000078 BLOCK  /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237
c:0022 p:0054 s:0077 b:0077 l:000076 d:000076 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:225
c:0021 p:0013 s:0072 b:0072 l:000071 d:000071 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237
c:0020 p:0186 s:0067 b:0067 l:000066 d:000066 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:176
c:0019 p:0016 s:0063 b:0062 l:000061 d:000061 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:135
c:0018 p:0013 s:0058 b:0058 l:000051 d:000057 BLOCK  /home/jackc/work/segfault/spec/spec_helper.rb:18
c:0017 p:0062 s:0055 b:0055 l:000054 d:000054 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core.rb:79
c:0016 p:0125 s:0052 b:0052 l:000051 d:000051 TOP    /home/jackc/work/segfault/spec/spec_helper.rb:10
c:0015 p:---- s:0050 b:0050 l:000049 d:000049 FINISH
c:0014 p:---- s:0048 b:0048 l:000047 d:000047 CFUNC  :require
c:0013 p:0011 s:0044 b:0044 l:000043 d:000043 TOP    /home/jackc/work/segfault/spec/controllers/application_controller_spec.rb:1
c:0012 p:---- s:0042 b:0042 l:000041 d:000041 FINISH
c:0011 p:---- s:0040 b:0040 l:000039 d:000039 CFUNC  :load
c:0010 p:0025 s:0036 b:0036 l:000027 d:000035 BLOCK  /usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419
c:0009 p:---- s:0033 b:0033 l:000032 d:000032 FINISH
c:0008 p:---- s:0031 b:0031 l:000030 d:000030 CFUNC  :map
c:0007 p:0017 s:0028 b:0028 l:000027 d:000027 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419
c:0006 p:0074 s:0025 b:0025 l:000024 d:000024 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/command_line.rb:18
c:0005 p:0055 s:0020 b:0020 l:000019 d:000019 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:80
c:0004 p:0101 s:0014 b:0014 l:000013 d:000013 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:69
c:0003 p:0021 s:0007 b:0006 l:002108 d:000005 BLOCK  /usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:11
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:000688 d:000688 TOP
---------------------------
-- Ruby level backtrace information ----------------------------------------
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:11:in `block in autorun'
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:69:in `run'
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:80:in `run_in_process'
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/command_line.rb:18:in `run'
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `load_spec_files'
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `map'
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `block in load_spec_files'
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `load'
/home/jackc/work/segfault/spec/controllers/application_controller_spec.rb:1:in `<top (required)>'
/home/jackc/work/segfault/spec/controllers/application_controller_spec.rb:1:in `require'
/home/jackc/work/segfault/spec/spec_helper.rb:10:in `<top (required)>'
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core.rb:79:in `configure'
/home/jackc/work/segfault/spec/spec_helper.rb:18:in `block in <top (required)>'
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:135:in `mock_with'
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:176:in `mock_framework='
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:225:in `load_dependency'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `block in require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/mocking/with_rspec.rb:1:in `<top (required)>'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:225:in `load_dependency'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `block in require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-mocks-2.6.0/lib/rspec/mocks.rb:1:in `<top (required)>'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:225:in `load_dependency'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `block in require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-mocks-2.6.0/lib/rspec/mocks/framework.rb:14:in `<top (required)>'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:225:in `load_dependency'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `block in require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `require'

-- C level backtrace information -------------------------------------------
/usr/local/bin/ruby(rb_vm_bugreport+0x9e) [0x523b6e]
/usr/local/bin/ruby() [0x565508]
/usr/local/bin/ruby(rb_bug+0xb1) [0x5656a1]
/usr/local/bin/ruby() [0x4b2ca8]
/lib/libpthread.so.0(+0xf8f0) [0x7fa523e988f0]
/usr/local/bin/ruby(st_free_table+0x43) [0x4bbb33]
/usr/local/bin/ruby() [0x426cf5]
/usr/local/bin/ruby() [0x4277ed]
/usr/local/bin/ruby() [0x4c0562]
/usr/local/bin/ruby(rb_usascii_str_new+0x13) [0x4c0683]
/usr/local/bin/ruby(rb_file_expand_path+0x42) [0x5706c2]
/usr/local/bin/ruby() [0x56a63a]
/usr/local/bin/ruby(rb_require_safe+0x25d) [0x56aa8d]
/usr/local/bin/ruby() [0x51307f]
/usr/local/bin/ruby() [0x5168c1]
/usr/local/bin/ruby() [0x519499]
/usr/local/bin/ruby(rb_iseq_eval+0x1ee) [0x519aee]
/usr/local/bin/ruby() [0x569a08]
/usr/local/bin/ruby(rb_require_safe+0x647) [0x56ae77]
/usr/local/bin/ruby() [0x51307f]
/usr/local/bin/ruby() [0x5168c1]
/usr/local/bin/ruby() [0x519499]
/usr/local/bin/ruby(rb_iseq_eval+0x1ee) [0x519aee]
/usr/local/bin/ruby() [0x569a08]
/usr/local/bin/ruby(rb_require_safe+0x647) [0x56ae77]
/usr/local/bin/ruby() [0x51307f]
/usr/local/bin/ruby() [0x5168c1]
/usr/local/bin/ruby() [0x519499]
/usr/local/bin/ruby(rb_iseq_eval+0x1ee) [0x519aee]
/usr/local/bin/ruby() [0x569a08]
/usr/local/bin/ruby(rb_require_safe+0x647) [0x56ae77]
/usr/local/bin/ruby() [0x51307f]
/usr/local/bin/ruby() [0x5168c1]
/usr/local/bin/ruby() [0x519499]
/usr/local/bin/ruby(rb_iseq_eval+0x1ee) [0x519aee]
/usr/local/bin/ruby() [0x569a08]
/usr/local/bin/ruby(rb_require_safe+0x647) [0x56ae77]
/usr/local/bin/ruby() [0x51307f]
/usr/local/bin/ruby() [0x515546]
/usr/local/bin/ruby() [0x519499]
/usr/local/bin/ruby(rb_iseq_eval+0x1ee) [0x519aee]
/usr/local/bin/ruby() [0x569a08]
/usr/local/bin/ruby() [0x569b6b]
/usr/local/bin/ruby() [0x51307f]
/usr/local/bin/ruby() [0x515546]
/usr/local/bin/ruby() [0x519499]
/usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
/usr/local/bin/ruby() [0x53ac15]
/usr/local/bin/ruby() [0x51307f]
/usr/local/bin/ruby() [0x515546]
/usr/local/bin/ruby() [0x519499]
/usr/local/bin/ruby(rb_vm_invoke_proc+0x9f) [0x51c38f]
/usr/local/bin/ruby(rb_exec_end_proc+0x238) [0x41c5b8]
/usr/local/bin/ruby() [0x41c684]
/usr/local/bin/ruby(ruby_cleanup+0x12d) [0x41c7fd]
/usr/local/bin/ruby(ruby_run_node+0x3d) [0x41cb0d]
/usr/local/bin/ruby(main+0x49) [0x419c49]
/lib/libc.so.6(__libc_start_main+0xfd) [0x7fa52325cc4d]
/usr/local/bin/ruby() [0x419b39]

[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
</pre>

I've attached the minimal rails test app I could get to fail below.


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