Fallback fails for Linux Libertine O to Junicode over private area, debugging?

["J. P. Ascher via ntg-context" <ntg-context@ntg.nl>]

[-- Attachment #1: Type: text/plain, Size: 3137 bytes --]

Hi, all,

I'm a long time lurker (on gmane), first time poster. First, thank you
all, very much, for your excellent work and superb community.
ConTeXt has become a critical part of my academic writing and integral
to my research.  I'm not exaggerating when I say it changed how
I thought about texts and became a major source for my dissertation
work.  Thank you!

I'm trying to get a typescript for setting a text in Libertine with
Junicode fallbacks for characters in MUFI, in the private use area.
For some reason Libertine roman will not fallback no matter what
I do. However Libertine italic will.  I can also work around it by using
Junicode as a base and forcing fallback to Libertine.

My question is: why?  What's wrong with Libertine roman?  Or my approach?

My hypothesis is that there's something about `LinLibertine_R.otf`
that's not quite right.  I looked in FontForge, but couldn't
spot anything.

Does anyone have a suggestion as to another place to look?  Or something
I'm overlooking?

Minimal example (attached too, if it comes through):

```
\definefontfeature[default][default][script=latn]


% Libertine with a Junicode fallback, lib-fb-jun

\definefontfallback[junicodefallback][name:Junicode][privateusearea][check=yes,force=no]

\starttypescript [serif] [lib-fb-jun]
  \definefontsynonym [Libertine-Roman]     [file:linlibertiner]
  \definefontsynonym [Libertine-Slanted]  [file:linlibertineri]  % works fine
\stoptypescript
 
\starttypescript [serif] [lib-fb-jun] [name]
  \definefontsynonym [Serif]            [Libertine-Roman]   [features=default,fallbacks=junicodefallback]
  \definefontsynonym [SerifSlanted]     [Libertine-Slanted] [features=default,fallbacks=junicodefallback]
\stoptypescript
 
\starttypescript [lib-fb-jun]
  \definetypeface [lib-fb-jun] [rm] [serif] [lib-fb-jun] [default]
\stoptypescript


% Junicode with Libertine as a fallback, preferring Libertine, jun-pr-lib
% this hack does what I want the above to do

\definefontfallback[preferlibertine][name:linlibertineo][0-FFFFF][check=yes,force=yes]

\starttypescript[serif] [jun-pr-lib]
   \definefontsynonym [JunicodeRoman] [name:Junicode]
\stoptypescript

\starttypescript[serif] [jun-pr-lib] [name]
   \definefontsynonym [Serif] [JunicodeRoman] [fallbacks=preferlibertine]
\stoptypescript

\starttypescript [jun-pr-lib]
  \definetypeface [jun-pr-lib] [rm] [serif] [jun-pr-lib] [default]
\stoptypescript


% some tracking stuff

\enabletrackers[fonts.missing=replace]
\enabledirectives[logs.errors]


% text, we use lib-fb-jun first, then jun-pr-lib

\starttext
\setupbodyfont[lib-fb-jun]

{\em emph. lib-fb-jun: \Uchar61125 \char64259 \utfchar{"eec5} (three glyphs)}

lib-fb-jun: \Uchar61125 \char64259 \utfchar{"eec5} (three glyphs)  % <- fallback fails here

\switchtobodyfont[jun-pr-lib]

jun-pr-lib: \Uchar61125 \char64259 \utfchar{"eec5} (three glyphs) % <- works

\stoptext
```

Any ideas?

Most warmly,
-jp

-- 
J. P. Ascher
Preceding: https://doi.org/10.18130/jqpe-zc65
Current: http://www.bibsoc.org.uk/content/2020-2021-0


[-- Attachment #2: min.log --]
[-- Type: application/octet-stream, Size: 9153 bytes --]

open source     > level 1, order 1, name '/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/cont-yes.mkiv'
system          > 
system          > ConTeXt  ver: 2021.03.05 19:11 MKIV  fmt: 2021.4.3  int: english/english
system          > 
system          > 'cont-new.mkiv' loaded
open source     > level 2, order 2, name '/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/cont-new.mkiv'
system          > beware: some patches loaded from cont-new.mkiv
close source    > level 2, order 2, name '/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/cont-new.mkiv'
system          > files > jobname 'min', input './min', result 'min'
fonts           > latin modern fonts are not preloaded
languages       > language 'en' is active
open source     > level 2, order 3, name '/Users/james/Documents/Professional/2022 Spring/MLA TALK/query-to-listserv/min.tex'
fonts           > preloading latin modern fonts (second stage)
fonts           > defining > font 'lmroman12-regular', feature 'locl', script 'latn', no language 'dflt'
fonts           > 'fallback modern-designsize rm 12pt' is loaded
fonts           > defining > font 'linlibertiner', feature 'locl', script 'latn', no language 'dflt'
fonts           > defining > font 'linlibertiner', feature 'locl', script 'cyrl', no language 'dflt'
fonts           > defining > font 'linlibertineri', feature 'locl', script 'latn', no language 'dflt'
fonts           > defining > font 'linlibertineri', feature 'locl', script 'cyrl', no language 'dflt'
fonts           > checking > char  (U+0EEC5) in font 'Linux Libertine O' with id 8: missing
backend         > xmp > using file '/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/lpdf-pdx.xml'
pages           > flushing realpage 1, userpage 1, subpage 1
close source    > level 2, order 3, name '/Users/james/Documents/Professional/2022 Spring/MLA TALK/query-to-listserv/min.tex'
close source    > level 1, order 3, name '/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/cont-yes.mkiv'

system          > start used files

system          > text: min

system          > stop used files


system          > start used files

system          >    1: filename=char-prv.lua filetype=tex format=tex foundname=/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/char-prv.lua fullname=/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/char-prv.lua usedmethod=database
system          >    2: filename=cont-yes.mkiv filetype=tex foundname=/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/cont-yes.mkiv fullname=/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/cont-yes.mkiv usedmethod=database
system          >    3: filename=publ-imp-default.lua filetype=scripts foundname=/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/publ-imp-default.lua fullname=/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/publ-imp-default.lua usedmethod=database
system          >    4: filename=cont-new.mkiv filetype=tex foundname=/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/cont-new.mkiv fullname=/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/cont-new.mkiv usedmethod=database
system          >    5: filename=lang-exc.lua filetype=scripts foundname=/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/lang-exc.lua fullname=/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/lang-exc.lua usedmethod=database
system          >    6: filename=lang-us.lua filetype=scripts foundname=/usr/local/texlive/2021/texmf-dist/tex/context/patterns/mkiv/lang-us.lua fullname=/usr/local/texlive/2021/texmf-dist/tex/context/patterns/mkiv/lang-us.lua usedmethod=database
system          >    7: filename=/Users/james/Documents/Professional/2022 Spring/MLA TALK/query-to-listserv/min.tex foundname=/Users/james/Documents/Professional/2022 Spring/MLA TALK/query-to-listserv/min.tex fullname=/Users/james/Documents/Professional/2022 Spring/MLA TALK/query-to-listserv/min.tex usedmethod=direct
system          >    8: filename=lm.lfg filetype=tex foundname=/usr/local/texlive/2021/texmf-dist/tex/context/fonts/mkiv/lm.lfg fullname=/usr/local/texlive/2021/texmf-dist/tex/context/fonts/mkiv/lm.lfg usedmethod=database
system          >    9: filename=lmroman12-regular filetype=otf format=otf foundname=/usr/local/texlive/2021/texmf-dist/fonts/opentype/public/lm/lmroman12-regular.otf fullname=/usr/local/texlive/2021/texmf-dist/fonts/opentype/public/lm/lmroman12-regular.otf usedmethod=database
system          >   10: filename=latinmodern-math.otf filetype=opentypefonts foundname=/usr/local/texlive/2021/texmf-dist/fonts/opentype/public/lm-math/latinmodern-math.otf fullname=/usr/local/texlive/2021/texmf-dist/fonts/opentype/public/lm-math/latinmodern-math.otf usedmethod=database
system          >   11: filename=LinLibertine_R.otf filetype=otf format=otf foundname=/usr/local/texlive/2021/texmf-dist/fonts/opentype/public/libertine/LinLibertine_R.otf fullname=/usr/local/texlive/2021/texmf-dist/fonts/opentype/public/libertine/LinLibertine_R.otf usedmethod=database
system          >   12: filename=Junicode.ttf filetype=ttf format=ttf foundname=/usr/local/texlive/2021/texmf-dist/fonts/truetype/public/junicode/Junicode.ttf fullname=/usr/local/texlive/2021/texmf-dist/fonts/truetype/public/junicode/Junicode.ttf usedmethod=database
system          >   13: filename=LinLibertine_RI.otf filetype=otf format=otf foundname=/usr/local/texlive/2021/texmf-dist/fonts/opentype/public/libertine/LinLibertine_RI.otf fullname=/usr/local/texlive/2021/texmf-dist/fonts/opentype/public/libertine/LinLibertine_RI.otf usedmethod=database
system          >   14: filename=pdftex.map filetype=map format=map foundname=/usr/local/texlive/2021/texmf-var/fonts/map/pdftex/updmap/pdftex.map fullname=/usr/local/texlive/2021/texmf-var/fonts/map/pdftex/updmap/pdftex.map usedmethod=database
system          >   15: filename=lpdf-pdx.xml filetype=tex foundname=/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/lpdf-pdx.xml fullname=/usr/local/texlive/2021/texmf-dist/tex/context/base/mkiv/lpdf-pdx.xml usedmethod=database

system          > stop used files


system          > start commandline options

system          > currentrun="1"
system          > fulljobname="./min.tex"
system          > input="./min.tex"
system          > kindofrun="1"
system          > maxnofruns="9"
system          > texmfbinpath="/usr/local/texlive/2021/bin/universal-darwin"

system          > stop commandline options


system          > start commandline files

system          >    1: ./min.tex

system          > stop commandline files


modules         > start used modules


modules         > stop used modules


fonts           > start missing characters: /usr/local/texlive/2021/texmf-dist/fonts/opentype/public/libertine/LinLibertine_R.otf

fonts           >    2  U+0EEC5    PRIVATE SLOT

fonts           > stop missing characters


mkiv lua stats  > used config file: selfautoparent:/texmfcnf.lua;selfautoparent:/texmf-dist/web2c/texmfcnf.lua
mkiv lua stats  > used cache path: readable+writable: '/Users/james/Library/texlive/2021/texmf-var/luatex-cache/context/a86c089b384a3076dc514ba966a1fac9'
mkiv lua stats  > resource resolver: loadtime 0.054 seconds, 1 scans with scantime 0.000 seconds, 0 shared scans, 15 found files, scanned paths: /Users/james/Library/texmf
mkiv lua stats  > stored bytecode data: 454 modules (0.143 sec), 96 tables (0.006 sec), 550 chunks (0.149 sec)
mkiv lua stats  > traced context: maxstack: 1420, freed: 0, unreachable: 1420
mkiv lua stats  > cleaned up reserved nodes: 57 nodes, 9 lists of 442
mkiv lua stats  > node memory usage: 11 attribute, 4 attribute_list, 1 glue, 51 glue_spec, 3 kern, 2 penalty, 2 temp, 2 user_defined
mkiv lua stats  > node list callback tasks: 8 unique task lists, 7 instances (re)created, 50 calls
mkiv lua stats  > driver time: 0.045 seconds 
mkiv lua stats  > used backend: pdf (backend for directly generating pdf output)
mkiv lua stats  > jobdata time: 0.000 seconds saving, 0.000 seconds loading
mkiv lua stats  > callbacks: internal: 178, file: 121, direct: 2, late: 0, function 897, total: 1198 (1198 per page)
mkiv lua stats  > randomizer: resumed with value 0.36474906746298
mkiv lua stats  > result saved in file: min.pdf, compresslevel 3, objectcompresslevel 1
mkiv lua stats  > loaded patterns: en::1, load time: 0.000
mkiv lua stats  > loaded fonts: 5 files: linlibertine_r.otf, linlibertine_ri.otf, latinmodern-math.otf, lmroman12-regular.otf, junicode.ttf
mkiv lua stats  > font engine: otf 3.113, afm 1.513, tfm 1.000, 15 instances, 8 shared in backend, 5 common vectors, 3 common hashes, load time 0.168 seconds 
mkiv lua stats  > used platform: osx-64, type: unix, binary subtree: bin
mkiv lua stats  > used engine: luatex version: 1.13, functionality level: 7418, banner: this is luatex, version 1.13.0 (tex live 2021)
mkiv lua stats  > used hash slots: 47499 of 65536 + 200000
mkiv lua stats  > lua properties: engine: lua 5.3, used memory: 180 MB, ctx: 180 MB, max: unknown MB, hash chars: min(64,40), symbol mask: utf (τεχ)
mkiv lua stats  > runtime: 0.416 seconds, 1 processed pages, 1 shipped pages, 2.404 pages/second


[-- Attachment #3: min.pdf --]
[-- Type: application/pdf, Size: 28696 bytes --]

[-- Attachment #4: min.tex --]
[-- Type: application/x-tex, Size: 1836 bytes --]

[-- Attachment #5: Type: text/plain, Size: 493 bytes --]

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________