Dominique Pelle wrote:

> I can reproduce internal error E315 with Vim-7.2.411 on Linux:
> 
> $ yes | head > foo.txt
> $ chmod a-w foo.txt
> $ vim -u NONE -c 'au FileChangedRO * :%d' -c 'norm 3GD' foo.txt
> 
> Error detected while processing command line:W10: Warning: Changing a
> readonly file
> E315: ml_get: invalid lnum: 3
> 
> I realize that we're not meant to change the file in the
> FileChangedRO autocommand (and Vim warns about it: W10).
> However, I don't think it should cause an internal error.

Thanks for reporting this.  We should not get ml_get errors.
I wonder what would be the best way to handle this.
Perhaps it's just a matter of correcting the cursor position?

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