On Wednesday, July 16, 2014 9:18:53 AM UTC-7, Bram Moolenaar wrote: > Jacob Niehus wrote: > > > > > I agree with all of that in principle, but I've been able to reliably > > > compile and with and without the screen_start() and see the problem go > > > away with screen_start() there. Unfortunately I don't know why it > > > works, so I can't really defend my suggestion. > > > > > > Forcing a redraw with update_screen(CLEAR) does work, but anything > > > below that (NOT_VALID etc.) didn't work. It's not the best solution, > > > but I can't find the cause of the problem after lots of digging > > > through the code. > > > > Hmm, if CLEAR is necessary this indicates an external program is messing > > up the screen. Or there is a weird bug in Vim. For normal redrawing > > NOT_VALID should be sufficient. > > > > -- > > Why is "abbreviation" such a long word? > > > > /// Bram Moolenaar -- b...@moolenaar.net -- http://www.Moolenaar.net \\\ > > /// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\ > > \\\ an exciting new programming language -- http://www.Zimbu.org /// > > \\\ help me help AIDS victims -- http://ICCF-Holland.org ///
Bram,
I made a big discovery on this today. I can reproduce the problem very reliably
now. The issue occurs rarely when the system() command is called in insert
mode, e.g. in an InsertCharPre autocommand. I can reproduce the problem by
intentionally calling system() a bunch of times while typing in insert mode.
If you run Vim with "-u NONE -i NONE -S sys_ins.vim" and then type in insert
mode at a moderate pace (typing a single letter at a time doesn't seem to ever
cause the problem), the same letter will be inserted multiple times for a
single keypress and the displayed characters persist after exiting insert mode
until a complete redraw. The cursor can't be moved onto the anomalous
characters.
Let me know if you can reproduce the problem this way. I looked into the code
for inserting characters a bit, and the insert_char()/insert_char_bytes() are
only being called once per keypress, so I don't know how to proceed with
tracking down the problem.
Thanks,
Jake
" sys_ins.vim:
set nocp
function! DoSystem()
for n in range(1,20)
call system('ls')
endfor
endfunction
autocmd InsertCharPre * call DoSystem()
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sys_ins.vim
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