NetBeans Ruby IDE 070416
1.6.0-rc; Java HotSpot(TM) Client VM 1.6.0-rc-b99
Windows XP version 5.1 running on x86
en_US (nbrubyide); Cp1252
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native ruby + fast debugger

have a code:
-----------------
require "thread"
N=3
def abc(n)
  while TRUE
    puts n
  end
end

for n in 0..N-1
  Thread.start(n){|i| abc(i)}
end

sleep
--------------------
- put BP to line with "for" and to line with "puts  n"
- run debugger, it stops at "for" line, notice the thread number (there's only
one thread), invoke s-f5, session is finished, no process remains
- run debugger again, it stops at "for" line, now push f8 multiple times to make
another thread active, invoke s-f5, session seems finished, but there's process
still hanging!