问题
I have standard ruby-head and Rails 3.1rc4. I installed ruby-debug with following instructions from http://dirk.net/2010/04/17/ruby-debug-with-ruby-19x-and-rails-3-on-rvm/
But when i run rails s --debugger it will throw this strange error
/Users/schovi/.rvm/gems/ruby-head/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `require': dlopen(/Users/schovi/.rvm/gems/ruby-head/gems/linecache19-0.5.12/lib/trace_nums19.bundle, 9): Symbol not found: _ruby_current_thread (LoadError)
Referenced from: /Users/schovi/.rvm/gems/ruby-head/gems/linecache19-0.5.12/lib/trace_nums19.bundle
Expected in: flat namespace
in /Users/schovi/.rvm/gems/ruby-head/gems/linecache19-0.5.12/lib/trace_nums19.bundle - /Users/schovi/.rvm/gems/ruby-head/gems/linecache19-0.5.12/lib/trace_nums19.bundle
from /Users/schovi/.rvm/gems/ruby-head/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in `block in require'
from /Users/schovi/.rvm/gems/ruby-head/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:223:in `block in load_dependency'
Any idea? Thanks, David
回答1:
UPDATE:
Looks like you only need to put this in your gemfile:
gem "debugger"
and now works.
Old article follows
====================================
Jerome is correct, but lacking in the details. Here is the blow by blow, taken from this https://gist.github.com/1331533, in particular thanks to andrewroth's post. I've tested this as of the time of this post. One hopes that the changes will be deployed somewhere standard soon.
Installing ruby debugger on ruby 1.9.3-p125:
export PATCH_LEVEL=`ruby -e 'puts RUBY_PATCHLEVEL'`
export RVM_SRC=$HOME/.rvm/rubies/ruby-1.9.3-p$PATCH_LEVEL/include/ruby-1.9.1
gem install archive-tar-minitar
gem install ruby_core_source -- --with-ruby-include=/$RVM_SRC
export RVM_SRC=$HOME/.rvm/rubies/ruby-1.9.3-p$PATCH_LEVEL/include/ruby-1.9.1/ruby-1.9.3-p$PATCH_LEVEL
wget http://rubyforge.org/frs/download.php/75415/ruby-debug-base19-0.11.26.gem
wget http://rubyforge.org/frs/download.php/63094/ruby-debug19-0.11.6.gem
wget http://rubyforge.org/frs/download.php/75414/linecache19-0.5.13.gem
gem install linecache19-0.5.13.gem -- --with-ruby-include=/$RVM_SRC
# if that step failed, and you are running OSX Lion, then following this post can help you:
# http://stackoverflow.com/questions/8032824/cant-install-ruby-under-lion-with-rvm-gcc-issues
# this happens if you recently installed xcode from the app store.
# bizarrely, for me I had to do this: ln -s /usr/bin/gcc /usr/bin/gcc-4.2
gem install ruby-debug-base19-0.11.26.gem -- --with-ruby-include=/$RVM_SRC
Then edit Gemfile:
gem 'linecache19', '0.5.13', :path => "~/.rvm/gems/ruby-1.9.3-p#{RUBY_PATCHLEVEL}/gems/linecache19-0.5.13/"
gem 'ruby-debug-base19', '0.11.26', :path => "~/.rvm/gems/ruby-1.9.3-p#{RUBY_PATCHLEVEL}/gems/ruby-debug-base19-0.11.26/"
gem 'ruby-debug19', :require => 'ruby-debug'
Then install:
bundle install
回答2:
I used the gem 'debugger' which is a fork of ruby-debug(19) that works on 1.9.2 and 1.9.3 and installs easily for rvm/rbenv rubies. It makes the error disappear !
回答3:
It looks like this is a known bug in ruby-debug-base, for the moment. I have added my comment to the issue on the bug tracker. Plase consider adding your notes as well:
http://rubyforge.org/tracker/index.php?func=detail&aid=29222&group_id=8883&atid=34290
In the meantime, ruby 1.9 has a built-in debugger; its just very slow. Manually add this require line to your code:
require 'debug'
Also, the debugger breaks on all StandardError exceptions by default, so do this when it first starts up:
catch off
回答4:
If you are running Ruby 1.9.3x, to fix it go to ruby-debug on rubyforge, download and install ruby-debug-base 0.11.26 and linecache19 0.5.13. Modify your Gemfile to use these files, then run
bundle update ruby-debug-base19
Debugger should work now.
Thanks Jerome
回答5:
This was fixed upgrading to the latest gems of all debug
回答6:
Using ruby 1.9.3, I was able to get this to work by adding the gem 'ruby-debug-base19x' (note the 'x' at the end of the name) in addition to 'ruby-debug19'.
回答7:
My system is rvm 1.18.10 and ruby 1.9.3p392 on Mac OSX 10.8.5. I first installed gem 'ruby-debug19', but for the well-known reason, the debugger did not work.
I then ran
local$ gem install 'debugger'
as suggested by many other posts. The gem was installed successfully with the following outputs:
local$ gem install debugger
Fetching: debugger-ruby_core_source-1.2.3.gem (100%)
Fetching: debugger-linecache-1.2.0.gem (100%)
Fetching: debugger-1.6.2.gem (100%)
Building native extensions. This could take a while...
Successfully installed debugger-ruby_core_source-1.2.3
Successfully installed debugger-linecache-1.2.0
Successfully installed debugger-1.6.2
3 gems installed
Installing ri documentation for debugger-ruby_core_source-1.2.3...
Installing ri documentation for debugger-linecache-1.2.0...
Installing ri documentation for debugger-1.6.2...
Installing RDoc documentation for debugger-ruby_core_source-1.2.3...
Installing RDoc documentation for debugger-linecache-1.2.0...
Installing RDoc documentation for debugger-1.6.2...
local$ irb
1.9.3-p392 :002 > require 'debugger'
=> true
I then ran
local$ rails server --debug
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:
in`require': dlopen(/usr/local/rvm/gems/ruby-1.9.3-p392/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle,
9): Symbol not found: _ruby_current_thread (LoadError)
Referenced from: /usr/local/rvm/gems/ruby-1.9.3-p392/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle
Expected in: flat namespace
in /usr/local/rvm/gems/ruby-1.9.3-p392/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle - /usr/local/rvm/gems/ruby-1.9.3-p392/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle
......
I resolved this error by commenting out the line "gem 'ruby-debug19'" and adding a new line "gem 'debugger'" in the Gemfile, and then ran
local$ bundle update
After that, everything worked fine.
local$ rails server --debug
=> Booting WEBrick
=> Rails 3.2.14 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
=> Debugger enabled
[2013-10-15 12:50:21] INFO WEBrick 1.3.1
[2013-10-15 12:50:21] INFO ruby 1.9.3 (2013-02-22) [x86_64-darwin10.8.0]
[2013-10-15 12:50:21] INFO WEBrick::HTTPServer#start: pid=7206 port=3000
来源：https://stackoverflow.com/questions/6438116/rails-with-ruby-debugger-throw-symbol-not-found-ruby-current-thread-loaderro