Ruby-Mp3Info error when saving/closing a file - ruby

Question

I've upgraded to the new mp3info GEM and now there seems to be a problem when it comes to writing the changes to the MP3 tags. Ruby version 1.9.3, mp3info version 0.8.4, Windows 7 - 64 bit.
Simple program:
require 'mp3info'
mp3 = Mp3Info.open('a.mp3')
mp3.title = 'bogo'
mp3.close
Results in:
Errno::EACCES: Permission denied - (./.a.mp3.tmp, a.mp3)
from D:/Ruby193/lib/ruby/gems/1.9.1/gems/ruby-mp3info-0.8.4/lib/mp3info.rb:453:in `rename'
from D:/Ruby193/lib/ruby/gems/1.9.1/gems/ruby-mp3info-0.8.4/lib/mp3info.rb:453:in `close'
from (irb):6
from D:/Ruby193/bin/irb:12:in `<main>'
I've checked permissions on the file/folder, and I'm running as Administrator in the CMD shell.

Answer 1

Obsolete since ruby-mp3info version 0.8.8
This answer is obsolete since ruby-mp3info version 0.8.8
I think it is a bug in mp3info, (I checked the actual version 0.8.7).
The method Mp3Info#close does not always close the internal io.
If you modify mp3info.rb like this:
###>>>Approx line 370:
# Flush pending modifications to tags and close the file
# not used when source IO is a StringIO
def close
....
end
##### ###aprox line 465
#io.close unless #io.closed? ## <<<< add this.
#####
end
then the problem was solved for me.
This bug was reported and corrected in a pull request. The ruby-mp2info-gem version 0.8.8 (January 26, 2016 ) contains this correction.