ring buffer bug

[parubets]

Hello!

Anyone has an idea why is this happening? :)

Interactive Elixir (1.12.2) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> :ets_buffer.create(:small, :ring, 6)
:ets_buffer
iex(2)> :ets_buffer.write(:small, "1")
1
iex(3)> :ets_buffer.write(:small, "2")
2
iex(4)> :ets_buffer.write(:small, "3")
3
iex(5)> :ets_buffer.write(:small, "4")
4
iex(6)> :ets_buffer.read(:small, 1)
["1"]
iex(7)> :ets_buffer.read(:small, 1)
["2"]
iex(8)> :ets_buffer.read(:small, 1)
["3"]
iex(9)> :ets_buffer.read(:small, 1)
["4"]
iex(10)> :ets_buffer.read(:small, 1)
[]
iex(11)> :ets_buffer.write(:small, "5")
1
iex(12)> :ets_buffer.write(:small, "6")
2
iex(13)> :ets_buffer.write(:small, "7")
3
iex(14)> :ets_buffer.read(:small, 1)
["5", "6"]
iex(15)> :ets_buffer.read(:small, 1)
{:missing_ets_data, :small, -1}
iex(16)> :ets_buffer.read(:small, 1)
["7"]
iex(17)> :ets_buffer.read(:small, 1)
[]
iex(18)>

on iex line 14 ring buffer suddenly returns 2 elements, and on the line 15 :missing_ets_data error

[jaynel]

I have not mantained this repo for several years now.

[parubets]

yes, I noticed that :) but it's still very good and beautiful implementation, that's why I wanted to try it out :)
I don't think it's related to some dependency updates, more likely an error in logic. I thought it would be easy for you to spot an error :)