bug.rb

# Odd behavior in BigDecimal's util for Float#to_d
# on Ruby 1.9.3 and 2.0?
# 
require 'bigdecimal'
require 'bigdecimal/util'

puts "85.26.to_d.to_s('F')              # => #{85.26.to_d.to_s('F')}"
puts "BigDecimal.new('85.26').to_s('F') # => #{BigDecimal.new('85.26').to_s('F')}"

oddities = ('0.00'..'99.99').to_a.select do |v|
  v.to_f.to_d.to_s('F') =~ /\.\d{3}/
end

puts "Found #{oddities.size} oddities:"
puts "--------------------------------"

oddities.each do |v|
  puts "Float: #{v}  #to_d: #{v.to_f.to_d.to_s('F')}"
end

Thanks Ken! Very helpful.