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From: Lars Brinkhoff <lars@nocrew.org>
Newsgroups: gmane.emacs.devel
Subject: Re: (error "Window system frame should be used")
Date: Fri, 21 Apr 2017 09:45:42 +0200
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Lars Brinkhoff wrote:
> Lars Ingebrigtsen wrote:
>> Is there no way to create a headless Emacs that has window-system
>> frames?  It seems kinda unlikely that we don't have a way to test
>> these things?
>
> I'm wildly guessing it shouldn't be impossible to create a
> stub/shim/mock window system that's available in batch mode.

I'm noting that "emacs -nw" can make a graphical frame, but "emacs
-batch" can not.