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.
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