Still having problems with exceptions in IMAP module

I have this method defined in a program I use for checking access to
IMAP accounts.

def tryIMAP (host, usessl, user, pass)
retryc = false
proto = usessl ? “IMAPS” : “IMAP”
imap =, usessl ? 993 : 143, usessl)
rescue Net::IMAP::ByeResponseError => e
imap.disconnect if imap
STDERR.print “#{host} #{proto} #{e.to_s}\n”;
retryc = true
rescue => e
imap.disconnect if imap
STDERR.print “#{host} #{proto} #{e.to_s}\n”;
return ‘aborted’
end while retryc
imap.login( user, pass)
rescue Net::IMAP::NoResponseError

As you can see I explicitly have a rescue clause for
Net::IMAP::ByeResponseError but I still get the error raised at runtime

(Net::IMAP::ByeResponseError)948:in receive_responses': * BYE Autologout; idle for too long from /usr/lib/ruby/1.8/net/imap.rb:932:insynchronize’
from /usr/lib/ruby/1.8/net/imap.rb:932:in receive_responses' from /usr/lib/ruby/1.8/net/imap.rb:917:ininitialize’
from /usr/lib/ruby/1.8/net/imap.rb:916:in start' from /usr/lib/ruby/1.8/net/imap.rb:916:ininitialize’
from test.rb:11:in new' from test.rb:11:intryIMAP’
from test.rb:149
from test.rb:105:in each' from test.rb:105 from test.rb:94:ineach’
from test.rb:94
from test.rb:93:in `open’
from test.rb:93

I am testing several thousand accounts and this error happens at random
places in the list on different runs.

Can anyone suggest where I go from here. I suspect this is a bug
somewhere in imap.rb but I can’t reproduce this reliably. Sigh…


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