ruby 1.9.0 /home/yuesefa/project/ruby/import/import.rb:6:in `new': failed to allocate memory (NoMemoryError) from /home/yuesefa/project/ruby/import/import.rb:6:in `block in <main>' from /home/yuesefa/project/ruby/import/import.rb:4:in `times' from /h

code below:
------------------------------------------------
x = y = 0
a = b = []

20000.times do
 a << Thread.new do  x = y + 1 end
 b << Thread.new do  y = x + 1 end
end

a.each {|e| e.join}
b.each {|e| e.join}

print x," ",y,"\n"
-----------------------------------------------

error message:
/home/yuesefa/import.rb:6:in `new': failed to allocate memory
(NoMemoryError)
    from /home/yuesefa/import.rb:6:in `block in <main>'
    from /home/yuesefa/import.rb:4:in `times'
    from /home/yuesefa/import.rb:4:in `<main>'
-- stack frame ------------
-- control frame ----------
c:0001 p:---- s:0000 b:-001 l:000000 d:000000 ------
---------------------------
-- backtrace of native function call (Use addr2line) --
0x80dc84a
0x80f2618
0x80b6576
0xffffe420
0x80615bc
0x805c9dd
0x805cac1
0x805cb11
0x80568af
0xb7dcc8cc
0x80567e1
---------------------------------------------------
[BUG] Segmentation fault
ruby 1.9.0 (2007-01-17) [i686-linux]
---------------------------------------------------

i have 1.5GB Ram. seems something is wrong. The code is fine running on
Ruby-1.8.5 btw.