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srawlins/gist:704017

Created November 17, 2010 20:29
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bug in GMP gem
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gistfile1.rb
ruby-1.9.1-p378 > g_one = GMP::Z(1)
=> 1
ruby-1.9.1-p378 > a = b = GMP::Z(0)
=> 0
ruby-1.9.1-p378 > a += g_one
=> 1
ruby-1.9.1-p378 > a
=> 1
ruby-1.9.1-p378 > b
=> 0
ruby-1.9.1-p378 > c = d = GMP::Z(0)
=> 0
ruby-1.9.1-p378 > GMP::Z.add(c, c, g_one)
=> nil
ruby-1.9.1-p378 > c
=> 1
ruby-1.9.1-p378 > d
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