mksession saves closed buffers when it should not

[Felipe Vieira]

Here is my sessionoptions:
sessionoptions=blank,curdir,folds,help,options,tabpages,winsize
(removed the 'buffer' defaults)

I open 3 tabs with 'vim -p *py'.
I close one of those tabs and save session with 'mksession!'.
When I 'vim -S session.vim' it still open 3 tabs including the closed one.

I have also tried to 'bdelete' this buffer and have read the 'mksession' and 'sessionoptions' help with no success.

[Felipe Vieira]

Answer on:
https://groups.google.com/d/msg/vim_use/4Nun47Jsjvc/_eHL9sLDAAAJ

The workaround is to add argd after argadd on the 'resistant' buffer.