Kernel#sprintf returns result in incorrect register with 'x' pattern
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                 Key: JRUBY-2001
                 URL: http://jira.codehaus.org/browse/JRUBY-2001
             Project: JRuby
          Issue Type: Bug
          Components: Core Classes/Modules
         Environment: Latest JRuby 1.1RC1
            Reporter: Vladimir Sizikov
            Assignee: Vladimir Sizikov


puts "%x" % 0xFFFFFFF
puts "%x" % 0xFFFFFFFF

In MRI returns:
fffffff
ffffffff

In JRuby
fffffff
FFFFFFFF

:)

Fix is coming.

This also leads to to ipaddr rubyspec failures:

3)
IPAddr#ipv4_compat should ipv4_compat? FAILED
Expected "0000:0000:0000:0000:0000:0000:C0A8:0102"
to equal "0000:0000:0000:0000:0000:0000:c0a8:0102":
./mspec/expectations.rb:10:in `fail_with'
./mspec/matchers/base.rb:8:in `=='
/opt/work/rubinius/./spec/ruby/1.8/library/ipaddr/ipv4_conversion_spec.rb:9
/opt/work/rubinius/./spec/ruby/1.8/library/ipaddr/ipv4_conversion_spec.rb:6:in 
`call'
./mspec/runner/runner.rb:136:in `describe'
./mspec/runner/runner.rb:135:in `each'
./mspec/runner/runner.rb:130:in `describe'
./mspec/runner/runner.rb:135:in `describe'
/opt/work/rubinius/./spec/ruby/1.8/library/ipaddr/ipv4_conversion_spec.rb:4
/opt/work/rubinius/./spec/ruby/1.8/library/ipaddr/ipv4_conversion_spec.rb:4:in 
`load'
tmp/last_ci.rb:52
tmp/last_ci.rb:44:in `each'
tmp/last_ci.rb:44

4)
IPAddr#ipv4_mapped should ipv4_mapped FAILED
Expected "::FFFF:192.168.1.2" to equal "::ffff:192.168.1.2":
./mspec/expectations.rb:10:in `fail_with'
./mspec/matchers/base.rb:8:in `=='
/opt/work/jruby.git/lib/ruby/1.8/ipaddr.rb:199
/opt/work/rubinius/./spec/ruby/1.8/library/ipaddr/ipv4_conversion_spec.rb:27:in 
`call'
./mspec/runner/runner.rb:136:in `describe'
./mspec/runner/runner.rb:135:in `each'
./mspec/runner/runner.rb:130:in `describe'
./mspec/runner/runner.rb:135:in `describe'
/opt/work/rubinius/./spec/ruby/1.8/library/ipaddr/ipv4_conversion_spec.rb:25
/opt/work/rubinius/./spec/ruby/1.8/library/ipaddr/ipv4_conversion_spec.rb:25:in 
`load'
tmp/last_ci.rb:52
tmp/last_ci.rb:44:in `each'
tmp/last_ci.rb:44


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