Bug #5490: Bignum#div(0.0) raises FloatDomainError instead of ZeroDivisionError

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin10.8.0]

[brixen (Brian Shirai)]

Bignum#div(0.0) raises FloatDomainError. Everything else raises ZeroDivisionError.

This should be fixed in both 1.9.3 and 2.0.0.

sasha:rubinius brian$ ruby -v
ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin10.8.0]
sasha:rubinius brian$ irb
ruby-1.9.2-p290 :001 > 1.div 0.0
ZeroDivisionError: divided by 0
from (irb):1:in div' from (irb):1 from /Users/brian/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in '
ruby-1.9.2-p290 :002 > 1.1.div 0.0
ZeroDivisionError: divided by 0
from (irb):2:in div' from (irb):2 from /Users/brian/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in '
ruby-1.9.2-p290 :003 > Rational(1).div 0.0
ZeroDivisionError: divided by 0
from (irb):3:in div' from (irb):3 from /Users/brian/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in '
ruby-1.9.2-p290 :004 > 0xffff_ffff_ffff_ffff.div 0.0
FloatDomainError: Infinity
from (irb):4:in div' from (irb):4 from /Users/brian/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in '

Thanks,
Brian

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r33536.
Brian, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

• bignum.c (rb_big_divide): raise ZeroDivisionError if divisor is
  zero, as well as Fixnum. [ruby-core:40429] [Bug #5490]

[brixen (Brian Shirai)]

Is this going to be backported to 1.9? The RubySpecs were changed with a ruby_version_is guard, which would be incorrect if this is considered a bug. If it's not considered a bug, why not?

Thanks,
Brian