Integer#prime_division from mathn library handles negative integers incorrectly
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Key: JRUBY-4243
URL: http://jira.codehaus.org/browse/JRUBY-4243
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules, RubySpec
Affects Versions: JRuby 1.4
Reporter: Vladimir Sizikov
jruby -rmathn -e "p -26.prime_division" ==> [[2,1]]
Which is obviously wrong. This bug comes with MRI library. It has been fixed in
MRI 1.9.2, and the proper result is:
[[-1, 1], [2, 1], [13, 1]]
This also causes one rubyspec failure:
{noformat}
Integer#prime_division Performs a prime factorization of a negative integer
FAILED
Expected [[2, 1]]
to equal [[-1, 1], [2, 1], [13, 1]]
/opt/work/rubyspec.git/library/mathn/integer/prime_division_spec.rb:13
/opt/work/rubyspec.git/library/mathn/integer/prime_division_spec.rb:4
/opt/work/rubyspec.git/library/mathn/integer/prime_division_spec.rb:55:in `load'
{noformat}
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