Hans,
using latest from today (and the previous one) with the following source:
\starttext
\doloopoverlist{\tf,\ss,\tt}
{\bgroup\recursestring%
\doloopoverlist{\tf,\it,\bf,\bi,\sc}
{\bgroup\recursestring\dorecurse{26}
{\character{\recurselevel}̱ }\par}\egroup}
\stoptext
I get the following error:
mtx-context | fatal error: return code: 1
But when checking the sources, no error is found:
$ mtxrun --script check test-file.tex
no error
Just in case it helps, creators are "LuaMetaTeX 2.10 20220818 + ConTeXt
LMTX 2022.08.25 17:43".
I don’t know whether I’m missing something (in that case, the error
message should be more verbose).
Many thanks for your help,
Pablo