Can install gem ruby-debug, but rails server can't find it

Question

I found a pretty interesting problem installing ruby gems

bluehat@Matapan:~/code/Amacron$ rails server --debugger
=> Booting WEBrick
=> Rails 3.0.3 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
You need to install ruby-debug to run the server in debugging mode. With gems, use 'gem install ruby-debug'
Exiting
bluehat@Matapan:~/code/Amacron$ sudo gem install ruby-debug
Successfully installed ruby-debug-0.10.4
1 gem installed
Installing ri documentation for ruby-debug-0.10.4...
Installing RDoc documentation for ruby-debug-0.10.4...
bluehat@Matapan:~/code/Amacron$ rails server --debugger
=> Booting WEBrick
=> Rails 3.0.3 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
You need to install ruby-debug to run the server in debugging mode. With gems, use 'gem install ruby-debug'
Exiting
bluehat@Matapan:~/code/Amacron$ sudo gem update ruby-debug
Updating installed gems
Nothing to update
bluehat@Matapan:~/code/Amacron$ gem --version
1.3.7
bluehat@Matapan:~/code/Amacron$ rails --version
Rails 3.0.3

System is an up-to-date Ubuntu 11.04

score 9 · Accepted Answer · answered Jan 24 '11 at 03:02

9

Did you put this gem in your application's Gemfile?

answered Jan 24 '11 at 03:02

Ryan Bigg

106,965
23
235
261

It was commented out. That was extraordinarily humiliating. Thank you good sir. – Katy Levinson Jan 24 '11 at 03:27
@Katy: Happens to the best of us. Glad I helped :) – Ryan Bigg Jan 24 '11 at 06:59
Worked for me too. Frustrating that the error message's advice doesn't work! – John Gibb Mar 10 '11 at 20:47
@Katy: well you're in (possibly good?) company ... I wound up here after Googling for exactly the same problem :-) – Duncan Bayne Jun 23 '11 at 07:33

score 1 · Answer 2 · answered Oct 21 '11 at 00:49

1

I solved this problem by installing the irb package. The error message was about ruby-debug, but once I installed the debian packed for irb all was fine.

answered Oct 21 '11 at 00:49

bissej

285
3
9

score 1 · Answer 3 · answered Feb 03 '12 at 03:04

1

I had exactly the same problem. The reason was that in the application's Gemfile, the line "gem 'ruby-debug'" was commented out. I enabled this line and everything worked fine.

answered Feb 03 '12 at 03:04

Julia Zhao

899
1
6
11

score 0 · Answer 4 · answered Aug 19 '11 at 22:23

0

I was having a similar issue. I tried running script/server as sudo, and that worked fine, and oddly after that I was able to run it as my regular user.

answered Aug 19 '11 at 22:23

jbee

1

Can install gem ruby-debug, but rails server can't find it

4 Answers4