On Friday, 26 July 2013 06:23:18 UTC+1, Vlad Irnov  wrote:
> On 7/23/13, Bram Moolenaar <[email protected]> wrote:
> 
> >
> 
> > Vlad Irnov wrote:
> 
> >
> 
> >> I confirm that this issue has been fixed by Patch 7.4a.027 and
> 
> >> subseqent, but only partially.
> 
> >> The same errors can occur when Python deletes lines in another buffer.
> 
> >> The following tests show how to reproduce (also attached).
> 
> >> Tested with Vim 7.4a BETA, patches 1-39, compiled with MinGW, Windows 8.
> 
> >>
> 
> >> "---vim74a_E315_test2.vim-----------------------------
> 
> >> tabnew BUFFER1
> 
> >> call setline(1, ['','aaa {{{1','bbb {{{2','ccc {{{3'])
> 
> >> setl fdm=marker fdt=getline(v:foldstart) fdl=0
> 
> >> " 'splitbelow' is needed to get ml_get errors.
> 
> >> set splitbelow
> 
> >> new BUFFER2
> 
> >> py import vim
> 
> >> py B2=vim.current.buffer
> 
> >> wincmd p
> 
> >> py B2[0]='BUFFER2...'
> 
> >> for i in range(10)
> 
> >>     py B2.append(['xxx','yyy'])
> 
> >>     py del B2[-1]
> 
> >> endfor
> 
> >> " Multiple errors 'E315: ml_get: invalid lnum: 3'.
> 
> >> " Folding is wrong in BUFFER1--there are no folds.
> 
> >>
> 
> >>
> 
> >> "---vim74a_E315_test3.vim-----------------------------
> 
> >> tabnew BUFFER1
> 
> >> call setline(1, ['','aaa {{{1','bbb {{{2','ccc {{{3'])
> 
> >> setl fdm=marker fdt=getline(v:foldstart) fdl=0
> 
> >> new BUFFER2
> 
> >> py import vim
> 
> >> py B2=vim.current.buffer
> 
> >> wincmd p
> 
> >> py B2.append(['xxx','yyy'])
> 
> >> " This does not cause ml_get errors, but disrupts folding.
> 
> >> py del B2[-1]
> 
> >> " Folds are now wrong in BUFFER1.
> 
> >
> 
> > Thanks for reproducing another problem.  I'll add it to the todo list.
> 
> 
> 
> I am happy to confirm that these types of issues are fixed in
> 
> vim-7-4a-044. Thanks.
> 
> Regards,
> 
> Vlad

I can report that I still have this bug in build vim-7-4-052 from repo:
https://launchpad.net/~dgadomski/+archive/vim-daily

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