Dear developers,
Here is the example and warnings.
Example:
\startuseMPgraphic{mpos:par:columnset:textuline}
\iftracepositions show_multi_pars \else draw_multi_pars \fi ;
path p ; p := boundingbox currentpicture ;
currentpicture := currentpicture shifted (0,-0.3*StrutDepth) ;
setbounds currentpicture to p ;
\stopuseMPgraphic
\definetextbackground
[underline]
[location=text,
alternative=1,
mp=mpos:par:columnset:textuline,
background=,
frame=off]
\starttext
\underline{blurblur}
\stoptext
The compiled result has no underline and ConTeXt complains during compilation:
mplib : making 'metafun.mp' into
'/var/cache/texmf/luatex-cache/context/b51cb04348b3b14d1dfc7333fc9b63f2/formats/cont-en-metafun.mem'
mplib : problems with 'metafun.mp' from
'/var/cache/texmf/luatex-cache/context/b51cb04348b3b14d1dfc7333fc9b63f2/formats/cont-en-metafun.mem'
Best wishes,
Wei-Wei
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