Re: How can a highlight group combine custom attributes and a link?

Mark Lodato wrote:

[...]

> I am the user who is having the issues and I think I have discovered
> the underlying bug. As mentioned above, `:hi [default] link From To`
> should only do the link if From has no settings, and if default is
> omitted, should issue the error "E414: group has settings, highlight
> link ignored". In fact, at least on Ubuntu 14.04 package vim-gtk
> 7.4.052-1ubuntu3, this only happens if From has no *terminal*
> settings, unless you are running the command from gvim once it has
> started. If From has only gui settings and either running console vim
> is used or the commands are found in the startup files, the `:hi link
> From To` acts as though From has no settings and performs the link
> anyway.
>
> Here is a simple example:
>
> $ vim -u NONE
> :hi Foo guifg=blue
> :hi link Foo Error
>
> The above should error out but it does not. Here is a full example to
> show that this happens on both vim and gvim:
>
> $ mv .vim vim-bak
> $ mv .vimrc vimrc-bak
> $ cat >.vimrc <<EOF
> hi GuiTest guifg=blue
> hi CtermTest ctermfg=blue
> hi GuiTest
> hi CtermTest
> hi default link GuiTest Error
> hi default link CtermTest Error
> hi GuiTest
> hi CtermTest
> EOF
> $ gvim # or vim
>
> This gives the following result:
>
> GuiTest xxx guifg=blue
> CtermTest xxx ctermfg=12
> GuiTest xxx guifg=blue
> links to Error
> CtermTest xxx ctermfg=12
>
> The expected result is that neither GuiTest nor CtermTest link to Error.
>
> Note, however, that if you try to run those same commands once the gui
> has started, you get the expected error message. But this only works
> in gvim; regular vim exhibits the same bug as putting it in the vimrc
> file.

Yes, it appears the "if settings already exist" only checks for term
settings, not gui settings. This is inconsistant. I suppose we can
change that without causing trouble for existing setups.

--
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Unfortunately, it's not a fence.

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