biblatex - \cite 中西里尔字母“О”的问题

Question

我对此没有任何想法。请看最简单的例子。

\documentclass[draft]{book}

\usepackage[utf8]{inputenc}
\usepackage[T2A]{fontenc}
\usepackage[russian]{babel}
\usepackage [
            style       = gost-numeric,
            backend     = biber,
            language    = auto
            ]{biblatex}
\addbibresource{ref.bib}

\begin{document}
\cite[{АБВГДЕЁЖЗИЙКЛМНПРСТУФХЦЧШЩЪЫЬЭЮЯ О}~1234567890]{A}.
\printbibliography
\end{document}

ref.bib：

@ARTICLE{A,
    author      = {author},
    title       = {title},
    journal     = {journal},
    year        = {2000},
    volume      = {1},
    pages       = {1--100}
} 

输出：

Errors:

.../minimal.tex:18: Missing ) inserted for expression. [...ХЦЧШЩЪЫЬЭЮЯ О}~1234567890]{A}.]
.../minimal.tex:18: Missing = inserted for \ifnum. [...ХЦЧШЩЪЫЬЭЮЯ О}~1234567890]{A}.]
.../minimal.tex:18: Missing number, treated as zero. [...ХЦЧШЩЪЫЬЭЮЯ О}~1234567890]{A}.]
.../minimal.tex:18: Missing ) inserted for expression. [...ХЦЧШЩЪЫЬЭЮЯ О}~1234567890]{A}.]
.../minimal.tex:18: Missing number, treated as zero. [...ХЦЧШЩЪЫЬЭЮЯ О}~1234567890]{A}.]
.../minimal.tex:18: Missing ) inserted for expression. [...ХЦЧШЩЪЫЬЭЮЯ О}~1234567890]{A}.]
.../minimal.tex:18: Missing = inserted for \ifnum. [...ХЦЧШЩЪЫЬЭЮЯ О}~1234567890]{A}.]
.../minimal.tex:18: Missing number, treated as zero. [...ХЦЧШЩЪЫЬЭЮЯ О}~1234567890]{A}.]
.../minimal.tex:18: Missing ) inserted for expression. [...ХЦЧШЩЪЫЬЭЮЯ О}~1234567890]{A}.]
.../minimal.tex:18: Missing = inserted for \ifnum. [...ХЦЧШЩЪЫЬЭЮЯ О}~1234567890]{A}.]
.../minimal.tex:18: Missing number, treated as zero. [...ХЦЧШЩЪЫЬЭЮЯ О}~1234567890]{A}.]

有完整的俄文字母，但只有“О”会出现问题。删除“О”则不会出现“错误”。

有人知道是什么问题吗？

Answer 1

这似乎是 中的一个错误\blx@imc@ifnumeral，因为该行为可以通过以下方式重现：

\documentclass{article}

\usepackage[utf8]{inputenc}
\usepackage[T2A]{fontenc}
\usepackage[russian]{babel}

\usepackage{biblatex}

\begin{document}

\makeatletter
%\blx@imc@ifnumeral{Н}{\typeout{numeral}}{\typeout{not numeral}}
\blx@imc@ifnumeral{О}{\typeout{numeral}}{\typeout{not numeral}}
%\blx@imc@ifnumeral{П}{\typeout{numeral}}{\typeout{not numeral}}
%\blx@imc@ifnumeral{н}{\typeout{numeral}}{\typeout{not numeral}}
%\blx@imc@ifnumeral{о}{\typeout{numeral}}{\typeout{not numeral}}
%\blx@imc@ifnumeral{п}{\typeout{numeral}}{\typeout{not numeral}}
\makeatother

\end{document}

注释掉的行不会触发错误。请参见https://github.com/plk/biblatex/issues/559提交一份报告。

你可以用一个临时解决方案来“修复”这个问题：使用

\CYRO

而不是西里尔字母О（U+041E 西里尔大写字母 O）。

\begin{filecontents*}{\jobname.bib}
@ARTICLE{A,
    author      = {author},
    title       = {title},
    journal     = {journal},
    year        = {2000},
    volume      = {1},
    pages       = {1--100}
}
\end{filecontents*}

\documentclass{book}

\usepackage[utf8]{inputenc}
\usepackage[T2A]{fontenc}
\usepackage[russian]{babel}

\usepackage{csquotes}
\usepackage [
            style       = gost-numeric,
            backend     = biber,
            language    = auto
            ]{biblatex}

\addbibresource{\jobname.bib}

\begin{document}
\cite[АБВГДЕЁЖЗИЙКЛМНП\CYRO РСТУФХЦЧШЩЪЫЬЭЮЯ~1234567890]{A}.

\printbibliography
\end{document}