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 ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------