Ctest export failing with TL19

[Guenter Milde]

On 29.10.19, Kornel Benko wrote:

> With today's TL19, most of the remaining tests pass.
> (polyglossia updated today).

> Remaining tests are

> export/examples/fr/Modules/Braille_dvi3_systemF
> export/examples/fr/Modules/Braille_pdf5_systemF
> export/examples/fr/Presentations/Foils_pdf5_systemF

This looks like a problem with French, LuaTeX, and system fonts
(maybe polyglossia).

> export/export/latex/languages/th-en_utf8_pdf4_systemF
> export/examples/ko/cjk-ko-doc_pdf4_systemF

What is the error here?


With TL18 (Debian/Buster's "texlive 2018.20190227"), these test pass fine
(except Foils, because I do no have the required LaTeX package).

Instead, I get failures with 

The following tests FAILED:
	5761 - export/examples/sr/Modules/Braille_dvi3_systemF (Failed)
	5765 - export/examples/sr/Modules/Braille_pdf4_systemF (Failed)

The polyglossia package throws a (spurious) error because it asserts that
the font supports the Cyrillic script -- despite the document using Latin
script and language "Serbian (Latin)"!


> Günter, this is for you: The following inverted tests fail:
> INVERTED.LYXBUGS_export/export/latex/lyxbugs/3059-language-in-tables_dvi3_systemF
> INVERTED.LYXBUGS_export/export/latex/lyxbugs/3059-language-in-tables_pdf5_systemF
> INVERTED.TEXISSUES_export/doc/he/Intro_dvi3_systemF
> INVERTED.TEXISSUES_export/doc/he/Tutorial_dvi3_systemF
> INVERTED.TEXISSUES_export/examples/he/Example_%28LyXified%29_dvi3_systemF
> INVERTED.TEXISSUES_export/examples/he/Example_%28LyXified%29_pdf5_systemF
> INVERTED.TEXISSUES_export/examples/he/Example_%28raw%29_dvi3_systemF
> INVERTED.TEXISSUES_export/examples/he/Example_%28raw%29_pdf5_systemF
> INVERTED.TEXISSUES_export/examples/he/Welcome_dvi3_systemF
> INVERTED.TEXISSUES_export/examples/he/Welcome_pdf5_systemF
> INVERTED.TEXISSUES_export/examples/ar/Welcome_dvi3_systemF

Export fails with TL18 (after uninverting)

I updated unreliable:varying-versions.

Günter