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Enumerable#find_index gives wrong result in case with types cast #2902

dzjuck opened this Issue May 1, 2015 · 1 comment


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commented May 1, 2015

# Minimal enumerable class
class List
  include ::Enumerable

  def initialize(*items)
    @items = items

  def each(&block)

# Works with array
a = [2]
puts a.find_index(2.0).inspect
#0 # mri
#0 # jruby

# Doesn't work with enumerable
b =
puts b.find_index(2.0).inspect
#0   # mri
# nil # jruby

# Works in another direction
c =
puts c.find_index(2).inspect
#0 # mri
#0 # jruby

# Works with comparison in block
d =
puts c.find_index { |i| i == 2.0 }.inspect
#0 # mri
#0 # jruby

Tried with
jruby 1.7.19 (1.9.3p551) 2015-01-29 20786bd on Java HotSpot(TM) 64-Bit Server VM 1.8.0_40-b27 +jit [darwin-x86_64]
jruby (2.2.2) 2015-04-18 06c5d29 Java HotSpot(TM) 64-Bit Server VM 25.40-b25 on 1.8.0_40-b27 +jit [darwin-x86_64]
ruby 1.9.3p551 (2014-11-13 revision 48407) [x86_64-darwin13.4.0]
ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-darwin13]

Should i submit specs for this case?

Anybody have ideas how to fix it?

Thank you.

@enebo enebo closed this in 5dc447a May 1, 2015

enebo added a commit that referenced this issue May 1, 2015

Fixes #2902. Enumerable#find_index gives wrong result in case with ty…
…pes cast


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commented May 1, 2015

Also fixed on jruby-1_7 in commit f131465

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