easy way to get a ruby segmentation fault

gistfile1.rb

~/Projects/opensource $ rails -v
ruby Rails 3.0.5
~/Projects/opensource $ ruby -v
ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-darwin10.6.0]
~/Projects/opensource $ rails new foo
      create  
      create  README
...
      create  vendor/plugins/.gitkeep
~/Projects/opensource $ cd foo/
~/Projects/opensource/foo $ mate Gemfile 
~/Projects/opensource/foo $ cat Gemfile 
source 'http://rubygems.org'

gem 'rails', '3.0.5'
gem 'jquery-rails'
gem 'pg'

~/Projects/opensource/foo $ bundle install
Fetching source index for http://rubygems.org/
Using rake (0.8.7) 
Using abstract (1.0.0) 
Using activesupport (3.0.5) 
Using builder (2.1.2) 
Using i18n (0.5.0) 
Using activemodel (3.0.5) 
Using erubis (2.6.6) 
Using rack (1.2.1) 
Using rack-mount (0.6.13) 
Using rack-test (0.5.7) 
Using tzinfo (0.3.24) 
Using actionpack (3.0.5) 
Using mime-types (1.16) 
Using polyglot (0.3.1) 
Using treetop (1.4.9) 
Using mail (2.2.15) 
Using actionmailer (3.0.5) 
Using arel (2.0.9) 
Using activerecord (3.0.5) 
Using activeresource (3.0.5) 
Using bundler (1.0.10) 
Using thor (0.14.6) 
Using railties (3.0.5) 
Using rails (3.0.5) 
Using jquery-rails (0.2.7) 
Using pg (0.10.1) 
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.
~/Projects/opensource/foo $ rails generate jquery:install
      remove  public/javascripts/controls.js
      remove  public/javascripts/dragdrop.js
      remove  public/javascripts/effects.js
      remove  public/javascripts/prototype.js
    fetching  jQuery (1.5)
      create  public/javascripts/jquery.js
      create  public/javascripts/jquery.min.js
    fetching  jQuery UJS adapter (github HEAD)
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:678: [BUG] Segmentation fault
ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-darwin10.6.0]

-- control frame ----------
c:0043 p:---- s:0216 b:0216 l:000215 d:000215 CFUNC  :connect
c:0042 p:0011 s:0213 b:0213 l:0007e0 d:000212 BLOCK  /Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:678
c:0041 p:0031 s:0211 b:0211 l:000210 d:000210 METHOD /Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/timeout.rb:44
c:0040 p:0026 s:0199 b:0199 l:000198 d:000198 METHOD /Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/timeout.rb:87
c:0039 p:0444 s:0193 b:0193 l:0007e0 d:0007e0 METHOD /Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:678
c:0038 p:0011 s:0185 b:0185 l:000184 d:000184 METHOD /Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:637
c:0037 p:0048 s:0182 b:0182 l:000181 d:000181 METHOD /Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:626
c:0036 p:0646 s:0179 b:0179 l:000178 d:000178 METHOD /Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:306
c:0035 p:0024 s:0159 b:0159 l:000158 d:000158 METHOD /Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:769
c:0034 p:0047 s:0153 b:0153 l:000cf0 d:000152 BLOCK  /Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:203
c:0033 p:---- s:0151 b:0151 l:000150 d:000150 FINISH
c:0032 p:---- s:0149 b:0149 l:000148 d:000148 CFUNC  :catch
c:0031 p:0491 s:0145 b:0145 l:000cf0 d:000cf0 METHOD /Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:201
c:0030 p:0328 s:0131 b:0131 l:000130 d:000130 METHOD /Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:146
c:0029 p:0022 s:0120 b:0120 l:000119 d:000119 METHOD /Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:671
c:0028 p:0096 s:0115 b:0115 l:000114 d:000114 METHOD /Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:33
c:0027 p:0103 s:0108 b:0108 l:000a88 d:000a88 METHOD /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/actions/file_manipulation.rb:77
c:0026 p:0031 s:0099 b:0099 l:000098 d:000098 METHOD /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/jquery-rails-0.2.7/lib/generators/jquery/install/install_generator.rb:34
c:0025 p:0036 s:0096 b:0096 l:000095 d:000095 METHOD /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/task.rb:22
c:0024 p:0071 s:0090 b:0090 l:000089 d:000089 METHOD /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/invocation.rb:118
c:0023 p:0012 s:0084 b:0084 l:000070 d:000083 BLOCK  /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/invocation.rb:124
c:0022 p:---- s:0080 b:0080 l:000079 d:000079 FINISH
c:0021 p:---- s:0078 b:0078 l:000073 d:000077 IFUNC 
c:0020 p:---- s:0076 b:0076 l:000075 d:000075 CFUNC  :each
c:0019 p:---- s:0074 b:0074 l:000073 d:000073 CFUNC  :map
c:0018 p:0023 s:0071 b:0071 l:000070 d:000070 METHOD /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/invocation.rb:124
c:0017 p:0152 s:0068 b:0068 l:000067 d:000067 METHOD /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/group.rb:226
c:0016 p:0102 s:0059 b:0059 l:000058 d:000058 METHOD /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/base.rb:389
c:0015 p:0128 s:0053 b:0053 l:000052 d:000052 METHOD /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.5/lib/rails/generators.rb:163
c:0014 p:0154 s:0045 b:0045 l:000044 d:000044 TOP    /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.5/lib/rails/commands/generate.rb:10
c:0013 p:---- s:0042 b:0042 l:000041 d:000041 FINISH
c:0012 p:---- s:0040 b:0040 l:000039 d:000039 CFUNC  :require
c:0011 p:0012 s:0036 b:0036 l:000020 d:000035 BLOCK  /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239
c:0010 p:0005 s:0034 b:0034 l:000025 d:000033 BLOCK  /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:225
c:0009 p:0045 s:0032 b:0032 l:000031 d:000031 METHOD /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:596
c:0008 p:0041 s:0026 b:0026 l:000025 d:000025 METHOD /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:225
c:0007 p:0013 s:0021 b:0021 l:000020 d:000020 METHOD /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239
c:0006 p:0346 s:0016 b:0016 l:000015 d:000015 TOP    /Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.5/lib/rails/commands.rb:17
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:0014e8 d:001e08 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:0014e8 d:0014e8 TOP   
---------------------------
-- Ruby level backtrace information ----------------------------------------
script/rails:6:in `<main>'
script/rails:6:in `require'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.5/lib/rails/commands.rb:17:in `<top (required)>'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239:in `require'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:225:in `load_dependency'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:596:in `new_constants_in'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:225:in `block in load_dependency'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239:in `block in require'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239:in `require'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.5/lib/rails/commands/generate.rb:10:in `<top (required)>'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.5/lib/rails/generators.rb:163:in `invoke'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/base.rb:389:in `start'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/group.rb:226:in `dispatch'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `invoke_all'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `map'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `each'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `block in invoke_all'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/invocation.rb:118:in `invoke_task'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/task.rb:22:in `run'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/jquery-rails-0.2.7/lib/generators/jquery/install/install_generator.rb:34:in `download_ujs_driver'
/Users/plentz/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/actions/file_manipulation.rb:77:in `get'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:33:in `open'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:671:in `open'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:146:in `open_uri'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:201:in `open_loop'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:201:in `catch'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:203:in `block in open_loop'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:769:in `buffer_open'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:306:in `open_http'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:626:in `start'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:637:in `do_start'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:678:in `connect'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/timeout.rb:87:in `timeout'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/timeout.rb:44:in `timeout'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:678:in `block in connect'
/Users/plentz/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/net/http.rb:678:in `connect'

-- C level backtrace information -------------------------------------------

[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

Abort trap

Just to add to the body of knowledge here, I ran into this error as well and commented the pg gem from Gemfile as mikeoligny had suggested, and without re-running bundle install, everything worked exactly as it was supposed to. This is odd because I ran into the same segmentation fault error with Devise a few days ago, also with http.rb.

Same problem here too, also using PG but if I comment it out of the Gemfile (no re-bundle) it blows up with a 'where the heck is PG' type error :(

Looks like this bug: http://redmine.ruby-lang.org/issues/4611

FWIW I'm also getting this error, Mac OS X Snow Leopard with PostgesQL84 installed via MacPorts, with gem 'pg' in my Gemfile it blows up with the same segfault, without it works perfectly.

Is anyone who is experiencing this problem connecting using 'https'? I suspect this is caused by conflicting versions of OpenSSL: if the version that's linked against your libpq is not the same as the one linked against your Ruby stdlib's openssl extension, there's bound to be problems.

PS- on MacOS X, you can check the shared libraries something is linked against using 'otool':

$ otool -L ~/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/x86_64-darwin10.4.0/openssl.bundle 
/Users/mgranger/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/x86_64-darwin10.4.0/openssl.bundle:
/Users/mgranger/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.1.9.1.dylib (compatibility version 1.9.1, current version 1.9.1)
/usr/lib/libssl.0.9.8.dylib (compatibility version 0.9.8, current version 0.9.8)
/usr/lib/libcrypto.0.9.8.dylib (compatibility version 0.9.8, current version 0.9.8)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.2.0)
/usr/lib/libobjc.A.dylib (compatibility version 1.0.0, current version 227.0.0)

$ otool -L /opt/local/lib/postgresql90/libpq.5.dylib 
/opt/local/lib/postgresql90/libpq.5.dylib:
/opt/local/lib/postgresql90/libpq.5.dylib (compatibility version 5.0.0, current version 5.3.0)
/opt/local/lib/libssl.1.0.0.dylib (compatibility version 1.0.0, current version 1.0.0)  <-- OOPS
/opt/local/lib/libcrypto.1.0.0.dylib (compatibility version 1.0.0, current version 1.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.2.0)

Here's my results from otool:

/Users/abailey/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/x86_64-darwin10.7.0/openssl.bundle:
/Users/abailey/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.1.9.1.dylib (compatibility version 1.9.1, current version 1.9.1)
/Users/abailey/.rvm/usr/lib/libssl.0.9.8.dylib (compatibility version 0.9.8, current version 0.9.8)
/Users/abailey/.rvm/usr/lib/libcrypto.0.9.8.dylib (compatibility version 0.9.8, current version 0.9.8)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.2.10)
/usr/lib/libobjc.A.dylib (compatibility version 1.0.0, current version 227.0.0)

/opt/local/lib/postgresql91/libpq.5.4.dylib:
/opt/local/lib/postgresql91/libpq.5.dylib (compatibility version 5.0.0, current version 5.4.0)
/opt/local/lib/libssl.1.0.0.dylib (compatibility version 1.0.0, current version 1.0.0)
/opt/local/lib/libcrypto.1.0.0.dylib (compatibility version 1.0.0, current version 1.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.2.10)

Looks like you're spot on!

Okay, thanks @jeromewilson. Anybody else?

If this is indeed the problem, then I should probably try to detect it in the extconf, or ideally at runtime, and output a warning. There's a ticket open in the 'pg' bugtracker for this issue; comments and/or suggestions are welcomed either here or there.

Not sure if this is of any help but I had the same issue and the otool just kept pointing me to different libssl versions every time. I just copy pasted the gem 'pg', :require => 'pg' to the bottom of the Gemfile and it worked.

Hope it helps!!!