On Thursday, February 23, 2017 at 6:10:27 PM UTC+2, Ben Fritz wrote:
> Assuming this is reliably repeatable, before performing the :w command that
> would create the undo file, do this to see what undolevels is and which
> script last changed it:
>
> :verbose set undolevels?
0. empty buffer:
undolevels=1000
1. I save an empty buffer with :saveas file.sec command: no undo file present
undolevels=-1
Last set from ~/.vimrc
2. I add text and save this now named buffer with :write command: undo file
appears
undolevels=-1
Last set from ~/.vimrc
3. I add more text and save this buffer again with :write command: undo file
disappears.
undolevels=-1
Last set from ~/.vimrc
That flashing undo file looks like this: http://i.imgur.com/84Dt8g8.png
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