divmod with 0.0 argument should raise FloatDomainError: NaN
-----------------------------------------------------------
Key: JRUBY-1934
URL: http://jira.codehaus.org/browse/JRUBY-1934
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.1RC1
Environment: Latest JRuby 1.1RC1 from trunk
Reporter: Vladimir Sizikov
Attachments: divmod-with-float-zero.patch
For, Float, Fixnum, Bignum, divmod with (0.0) should result in
FloatDomainError: NaN.
{noformat}
(2**100).divmod(0.0)
(200.0).divmod(0.0)
(2).divmod(0.0)
{noformat}
In MRI, all the lines above produce:
FloatDomainError: NaN
FloatDomainError: NaN
FloatDomainError: NaN
In JRuby:
FloatDomainError: Infinity
FloatDomainError: Infinity
FloatDomainError: Infinity
This also leads to one rubyspec failure:
1)
Bignum#divmod raises a FloatDomainError when the given argument is 0 and a
Float FAILED
Expected FloatDomainError (NaN) but got FloatDomainError (Infinity):
./mspec/expectations.rb:10:in `fail_with'
./mspec/expectations/should.rb:6:in `should'
/opt/work/rubinius/./spec/ruby/1.8/core/bignum/divmod_spec.rb:26
tmp/last_ci.rb:52:in `call'
./mspec/runner/runner.rb:136:in `describe'
./mspec/runner/object.rb:11:in `each'
./mspec/runner/runner.rb:130:in `describe'
./mspec/runner/object.rb:11:in `describe'
/opt/work/rubinius/./spec/ruby/1.8/core/bignum/divmod_spec.rb:4
tmp/last_ci.rb:52:in `load'
tmp/last_ci.rb:52
tmp/last_ci.rb:1:in `each'
tmp/last_ci.rb:44
The proposed patch fixes the problem.
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