bug.rb

require 'rubygems'
require 'redis'

def random_data
    r = rand(2)
    if r == 0
        return rand(10000)
    elsif r == 1
        return "x"*rand(520)
    end
end

r = Redis.new
1000000.times {
    cmd = []
    r.del(:mylist)
    begin
        2000.times {
            c = rand(7)
            if c == 0 or c == 1
                data = random_data()
                cmd << "LPUSH mylist #{data}"
                r.lpush(:mylist,data)
            elsif c == 2 or c == 3
                data = random_data()
                cmd << "RPUSH mylist #{data}"
                r.rpush(:mylist,data)
            elsif c == 4
                cmd << "RPOP mylist"
                r.rpop(:mylist)
            elsif c == 5
                cmd << "LPOP mylist"
                r.lpop(:mylist)
            else
                len = r.llen(:mylist).to_i
                ele = r.lindex(:mylist,rand(len))
                cmd << "LREM mylist #{ele}"
                r.lrem(:mylist,ele,1)
            end
        }
        r.ping
    rescue
        puts cmd.join("\n")
        f = File.open("/tmp/bug.txt","w")
        f.write(cmd.join("\n"))
        f.close
        puts "** Bug found **"
        exit
    end
}

bug.txt

DEL mylist
RPUSH mylist 934
LINDEX mylist -2
RPUSH mylist xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
LINDEX mylist -2
LPOP mylist
LINDEX mylist -2
RPUSH mylist 563
LINDEX mylist -2
LPUSH mylist xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
LINDEX mylist -2
LPUSH mylist 4581
LINDEX mylist -2
LREM mylist xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 1
LINDEX mylist -2
LREM mylist 563 1
LINDEX mylist -2
RPOP mylist
LINDEX mylist -2
LPUSH mylist 7334
LREM mylist foo -1