From: Hans Hagen <j.hagen@xs4all.nl>
To: "mailing list for ConTeXt users" <ntg-context@ntg.nl>,
"Michal Vlasák" <lahcim8@gmail.com>
Subject: Re: nuts.setfield is nil in generic code
Date: Thu, 8 Jul 2021 23:08:10 +0200 [thread overview]
Message-ID: <7e0765dd-5dab-babf-68e9-325f04efbf23@xs4all.nl> (raw)
In-Reply-To: <CCNTQFZ9TLDB.18MUTK8OVXM77@phobos>
On 7/8/2021 4:21 PM, Michal Vlasák wrote:
> Hello,
>
> in the generic font loader code `nuts.setfield` is `nil`.
>
> This is because in `luatex-basics-nod.lua` there is a wrong assignment
> for `nuts.setfield` on line 121 (there is no `setfield` at that scope,
> it should be `direct.setfield`). This is the required patch:
>
> ```diff
> --- a/luatex-basics-nod.lua
> +++ b/luatex-basics-nod.lua
> @@ -118,7 +118,7 @@ nuts.setcomponents = direct.setcomponents
> nuts.setdirection = direct.setdirection
> nuts.setdisc = direct.setdisc
> nuts.setreplace = direct.setreplace
> -nuts.setfield = setfield
> +nuts.setfield = direct.setfield
ok, will do
> nuts.setkern = direct.setkern
> nuts.setlink = direct.setlink
> nuts.setlist = direct.setlist
> ```
>
> This surfaced because `nuts.setreplace` in the generic code is defined
> in terms of `nuts.setfield`. Previously `nuts.setreplace` wasn't used
> anywhere (I think), but since 20th May 2021 it is used when injecting
> kerns into discretionaries (font-otj.lua):
>
> See also https://www.mail-archive.com/ntg-context@ntg.nl/msg98463.html.
>
> Minimal not working example is:
>
> ```
> \font\f=file:{./BaskervilleF-BoldItalic.otf}:mode=node;script=latn;kern=yes; at10pt
> \f B\-C
>
> \bye
> ```
>
> Fails with:
> "warning (node filter): error: ./luatex-fonts-merged.lua:5166: attempt to call a nil value (upvalue 'setfield')".
>
> Interestingly I can't reproduce the issue with Latin Modern, although it
> seems to have a similar kern:
>
> ```
> \font\f=file:lmroman10-regular.otf:mode=node;script=latn;kern=yes; at10pt
> \f V\-a
>
> \bye
one is injected before and one after so one ends up in the replacement
part which involves setfield
Hans
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prev parent reply other threads:[~2021-07-08 21:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-08 14:21 Michal Vlasák
2021-07-08 21:08 ` Hans Hagen [this message]
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