Hi,
There is a typo in m-tikz.mkxl (possibly a carry-over from t-tikz.tex). The module ends with a spurious `\stopmodule`:
https://github.com/contextgarden/context-mirror/blob/fe714093ebb95e4a8702827...
(Or rather, the corresponding `\startmodule` is missing).
This causes an interesting error message on the following test file:
\usemodule[tikz]
\usetypescriptfile[euler]
\definetypeface[mainfont][rm][serif][pagella][default]
\definetypeface[mainfont][mm][math] [pagellaovereuler][default]
\definetypeface[mainfont][tt][mono] [dejavu][default] [rscale=0.8, features=none]
\setupbodyfont[mainfont,11pt]
\starttext
$\dfrac{1}{2}$
\stoptext
which gives:
system > module wrapping error in 'tikz'
close source > level 2, order 67, name '/opt/luametatex/texmf-context/tex/context/modules/mkxl/m-tikz.mkxl'
open source > level 2, order 68, name '/opt/luametatex/texmf-context/tex/context/fonts/mkiv/type-imp-euler.mkiv'
open source > level 3, order 69, name '/opt/luametatex/texmf-context/tex/context/fonts/mkiv/type-imp-texgyre.mkiv'
close source > level 3, order 69, name '/opt/luametatex/texmf-context/tex/context/fonts/mkiv/type-imp-texgyre.mkiv'
open source > level 3, order 70, name '/opt/luametatex/texmf-context/tex/context/fonts/mkiv/type-imp-dejavu.mkiv'
close source > level 3, order 70, name '/opt/luametatex/texmf-context/tex/context/fonts/mkiv/type-imp-dejavu.mkiv'
suggestion > use \withcedilla instead of \c
suggestion > use \withcaron instead of \v
close source > level 2, order 70, name '/opt/luametatex/texmf-context/tex/context/fonts/mkiv/type-imp-euler.mkiv'
open source > level 2, order 71, name '/opt/luametatex/texmf-context/tex/context/fonts/mkiv/type-imp-texgyre.mkiv'
close source > level 2, order 71, name '/opt/luametatex/texmf-context/tex/context/fonts/mkiv/type-imp-texgyre.mkiv'
fonts > typescripts > unknown library 'pagellaovereuler'
open source > level 2, order 72, name '/opt/luametatex/texmf-context/tex/context/fonts/mkiv/type-imp-dejavu.mkiv'
close source > level 2, order 72, name '/opt/luametatex/texmf-context/tex/context/fonts/mkiv/type-imp-dejavu.mkiv'
fonts > defining > font with asked name 'unknown' is not found using lookup 'file'
fonts > defining > unable to define 'unknown' as 'mainfont-11pt-rm-tf-0--0'
fonts > defining > unable to define 'unknown' as 'mainfont-11pt-mm-mr--3'
fonts > defining > unable to define 'unknown' as 'mainfont-11pt-mm-mr--2'
fonts > defining > unable to define 'unknown' as 'mainfont-11pt-mm-mr--1'
fonts > defining > unable to define 'unknown' as 'mainfont-11pt-mm-mb--3'
fonts > defining > unable to define 'unknown' as 'mainfont-11pt-mm-mb--2'
fonts > defining > unable to define 'unknown' as 'mainfont-11pt-mm-mb--1'
tex error > tex error on line 10 in file ./test.tex: Math error: parameter 'fractionrule' in style 2 is not set