BigDecimal.sqrt is broken
-------------------------
Key: JRUBY-4772
URL: http://jira.codehaus.org/browse/JRUBY-4772
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.5.0.RC2
Environment: Mac OS X 10.6.3
Reporter: Hans-Georg Höhne
jruby-1.5.0.rc2 > require 'bigdecimal'
=> true
jruby-1.5.0.rc2 > require 'bigdecimal/math'
=> true
jruby-1.5.0.rc2 > include BigMath
=> Object
// ok
jruby-1.5.0.rc2 > two = BigDecimal("2")
=> #<BigDecimal:3f3a0212,'0.2E1',1(4)>
jruby-1.5.0.rc2 > sqrt(two, 4).to_s
=> "0.14142136E1"
// bugs
jruby-1.5.0.rc2 > twopoint = BigDecimal("2.0")
=> #<BigDecimal:5140709,'0.2E1',1(4)>
jruby-1.5.0.rc2 > sqrt(twopoint, 4).to_s
=> "0.14142136E2"
jruby-1.5.0.rc2 > sqrt(twopoint, 30).to_s
=> "0.4551558846033635285558452470029167E1"
jruby-1.5.0.rc2 > sqrt(twopoint, 60).to_s
=> "0.3048976695642557844097648087475601554101012066739306965391668523E1"
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