newrefcontext breaks numeric styles

[moewew]

I wanted to play around with labelprefix in the newest dev version of 3.4 and found that adding \newrefcontext[labelprefix=A] resets all numbers in citations to zero before \printbibliography.

See

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[style=numeric,backend=biber,defernumbers=true]{biblatex}

\addbibresource{biblatex-examples.bib}

\begin{document}
\newrefcontext[labelprefix=A]
\cite{sigfridsson,worman}
\printbibliography
\cite{sigfridsson,worman}
\end{document}

examples 16, 17, and 19 in the docs didn't work for me either. The prefix is always dropped and with numeric citations I get only "0".

---

BTW: I find it quite confusing the \newrefcontext seems to take only an optional argument ([...]), but when I omit it, biblatex complains; is it really a mandatory argument?

[dcpurton]

Confirmed! Works for me now.

[moewew]

Things work now.

But it seems as though biblatex keeps writing the same lines to the .aux over and over again. This leads to a very long .aux file if there are many citations and the temporary files are not cleared regularly. (I don't know about performance problems here, could be an issue if the entire list has to be read back.) It also confuses latexmk since that monitors the .aux file for changes and only considers the document stable if the .aux file is, which here it is never. Maybe there could be some redundancy checking before writing a line to the .aux?

[plk]

I should check with latexmk - I haven't used it for a while. Should be ok now.

[moewew]

Yes, thank you! It works absolutely fine now.