verb option causes an error

[lvjr]

Here is a minimal example:

\documentclass{article}

\usepackage{tabularray}

\begin{document}

\begin{tblr}{row{1}={font=\bfseries},verb}
  Head & Head \\
  Body & Body \\
\end{tblr}

\end{document}

It causes the folllowing error in both latest code and version 2021N:

> Step: calculate cell and line sizes.

! Undefined control sequence.
l.1 \bfseries\selectfontHead
                          \empty
l.12 \end
       {tblr}

[lvjr]

In fact, it is a bug of verb option. The following code causes the same error:

\documentclass{article}

\usepackage{tabularray}

\begin{document}

\begin{tblr}{verb}
  \bfseries Head & Head
\end{tblr}

\end{document}