Using JDB to debug Ruby and JRuby code together

gistfile1.txt

[] ~/projects/jruby $ jdb -Djruby.home=`pwd` -sourcepath `pwd` -classpath lib/jruby.jar 
Initializing jdb ...
> stop at blah:1
Deferring breakpoint blah:1.
It will be set after the class is loaded.
> run org.jruby.Main blah.rb
run  org.jruby.Main blah.rb
Set uncaught java.lang.Throwable
Set deferred uncaught java.lang.Throwable
> 
VM Started: Set deferred breakpoint blah:1

Breakpoint hit: "thread=main", blah.RUBY$script(), line=1 bci=23
1    def foo

main[1] list
1 => def foo
2      puts 1
3    end
4    
5    foo
main[1] step
> 
Step completed: "thread=main", org.jruby.runtime.Helpers.restoreScope(), line=1,772 bci=0

main[1] list
Source file not found: Helpers.java
main[1] use core/src/main/java
main[1] list
1,768            return descriptor;
1,769        }
1,770    
1,771        public static StaticScope restoreScope(String descriptor, StaticScope enclosingScope) {
1,772 =>         String[] bits = descriptor.split(";");
1,773    
1,774            StaticScope.Type type = StaticScope.Type.valueOf(bits[0]);
1,775            String file = bits[1];
1,776    
1,777            String[] varNames = bits[2].split(",");
main[1] 

Oh interesting — could be. I don't know enough about the IntelliJ guts, but glad to help in any way I can; this sounds tentatively right.