JRuby

[1.9] Fixnum#** sometimes returns wrong Bignum

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Description

Fixnum#** sometimes returns wrong Bignum in 1.9 mode.

$ jruby -v --1.9 -e '10.times {|i| puts "#

{(n = 2 ** i).class} #{n}" }'
jruby 1.6.0 (ruby 1.9.2 patchlevel 136) (2011-03-15 f3b6154) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_24) [linux-amd64-java]
Fixnum 1
Fixnum 2
Fixnum 4
Bignum 8
Fixnum 16
Bignum 32
Fixnum 64
Bignum 128
Fixnum 256
Bignum 512

The following is right behavior.

$ jruby -v --1.8 -e '10.times {|i| puts "#{(n = 2 ** i).class}

#

{n}

" }'
jruby 1.6.0 (ruby 1.8.7 patchlevel 330) (2011-03-15 f3b6154) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_24) [linux-amd64-java]
Fixnum 1
Fixnum 2
Fixnum 4
Fixnum 8
Fixnum 16
Fixnum 32
Fixnum 64
Fixnum 128
Fixnum 256
Fixnum 512

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Charles Oliver Nutter added a comment -

commit 81cd13e2fe6ee2f87b769851aeefedb626091e96
Author: Charles Oliver Nutter <headius@headius.com>
Date: Tue Apr 5 16:39:19 2011 -0500

Fix JRUBY-5693: [1.9] Fixnum#** sometimes returns wrong Bignum

  • We were not normalizing RubyBignum.op_mul results back to Fixnum where possible.
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Charles Oliver Nutter added a comment - commit 81cd13e2fe6ee2f87b769851aeefedb626091e96 Author: Charles Oliver Nutter <headius@headius.com> Date: Tue Apr 5 16:39:19 2011 -0500 Fix JRUBY-5693 : [1.9] Fixnum#** sometimes returns wrong Bignum We were not normalizing RubyBignum.op_mul results back to Fixnum where possible.

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  • Assignee:
    Charles Oliver Nutter
    Reporter:
    Masaki Ishihara
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    Updated:
    Resolved: