# Can't debug with JRuby?!?!?

**URL:** <https://www.ruby-forum.com/t/cant-debug-with-jruby/114471>\
**Category:** Ruby\
**Created:** [September 13, 2007, 1:31am UTC](https://www.ruby-forum.com/t/cant-debug-with-jruby/114471 "2007-09-13T01:31:37Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Kenosis](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/f04885/32.png) [@Kenosis](https://www.ruby-forum.com/u/Kenosis)\
**Post date:** [September 13, 2007, 1:31am UTC](https://www.ruby-forum.com/t/cant-debug-with-jruby/114471/1 "2007-09-13T01:31:37Z")

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Greetings,

Well, after several years of hoping I finally landed a job that is at  
least 50% Ruby development, woo hoo 🙂 Now then, we’re also doing a  
good bit of JRuby development and I’ve run into a snag which googling  
and searching this group has failed to resolve: I can’t debug from  
JRuby! I’ve got to believe I’m doing something wrong that’s so obvious  
I’m missing it. On JRuby 0.9.8 and 1.0.1, when I try to debug I get  
the following (see below) and I can’t list the code, set break points  
or anything else other than “continue.” Straight ruby has no problem  
and debugs as usual. I suspect the Signal.trap warning indicates that  
what the debugger needs to do is not yet supported but I find it hard  
to believe JRuby has gotten as far as it has w/the inability to debug  
with it. Anyone know what’s up?

Best,

Ken

516-\> jruby -r debug -d /tmp/x.rb  
/usr/lib/jruby-ut0.9/lib/ruby/1.8/debug.rb:764 warning: Signal.trap:  
Signals is currently not implemented in JRuby and will not work  
Debug.rb  
Emacs support available.

/tmp/x.rb:1:  
(rdb:1) list  
[-4, 5] in /tmp/x.rb  
No sourcefile available for /tmp/x.rb

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<div class="post-metadata">

**Author:** ![Kenosis](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/f04885/32.png) [@Kenosis](https://www.ruby-forum.com/u/Kenosis)\
**Post date:** [September 13, 2007, 1:42am UTC](https://www.ruby-forum.com/t/cant-debug-with-jruby/114471/2 "2007-09-13T01:42:37Z")

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Try NetBeans 6.0 10m

-r

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<div class="post-metadata">

**Author:** ![Kenosis](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/f04885/32.png) [@Kenosis](https://www.ruby-forum.com/u/Kenosis)\
**Post date:** [September 13, 2007, 3:13am UTC](https://www.ruby-forum.com/t/cant-debug-with-jruby/114471/3 "2007-09-13T03:13:42Z")

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Robert wrote:

> Try NetBeans 6.0 10m
> 
> -r

Actually, the dailies are far more stable right now…don’t use M10.

- Charlie