Reevaluating the definition of code-cells-convert-ipynb fixes the issue, so I assume this is a compilation time issue, cl-letf was not recognized as a macro and then((symbol-function 'json-read-array) 'forward-sexp) is seen as an invalid function application.
I'm getting:
the offending code is:
This is indeed right but I believe you should require
cl-lib
first (see https://www.gnu.org/software/emacs/manual/html_mono/cl.html#Usage).Reevaluating the definition of
code-cells-convert-ipynb
fixes the issue, so I assume this is a compilation time issue,cl-letf
was not recognized as a macro and then((symbol-function 'json-read-array) 'forward-sexp)
is seen as an invalid function application.