bug in multiplication

Details

  • Type: Bug Bug
  • Status: Closed Closed
  • Priority: Critical Critical
  • Resolution: Fixed
  • Affects Version/s: JRuby 1.2
  • Fix Version/s: JRuby 1.3RC1
  • Component/s: RubySpec
  • Labels:
    None
  • Environment:
    jirb or jruby

Description

y=1073741824
z0 = y*y*y
-> 0 (in jruby)
but
-> 1237940039285380274899124224 (in ruby)

hint: in hex
y = 0x40000000

Activity

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Charles Oliver Nutter added a comment -

Hah, very nice. We must not be detecting overflow in integer multiplication correctly.

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Charles Oliver Nutter added a comment - Hah, very nice. We must not be detecting overflow in integer multiplication correctly.
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Charles Oliver Nutter added a comment -

I love stupid little things like this, so I went ahead and fixed it. I also added a spec.

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Charles Oliver Nutter added a comment - I love stupid little things like this, so I went ahead and fixed it. I also added a spec.

People

  • Assignee:
    Charles Oliver Nutter
    Reporter:
    Karl Brodowsky
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Dates

  • Created:
    Updated:
    Resolved: