bug#36988: 26.2; Error "Non-hex digit used for Unicode escape" is not too helpful

[Lars Ingebrigtsen]

Drew Adams <drew.adams@oracle.com> writes:

> emacs -Q
>
> Put this text in *scratch*, then move point to bob:
>
> "\u2"
>
> Then evaluate (read (current-buffer)).  You get this error:
>
> Debugger entered--Lisp error: (error "Non-hex digit used for Unicode escape")
>   read(#<buffer *scratch*>)
>   eval((read (current-buffer)) nil)
>   eval-expression((read (current-buffer)) nil nil 127)
>   funcall-interactively(eval-expression (read (current-buffer)) nil nil 127)
>   call-interactively(eval-expression nil nil)
>   command-execute(eval-expression)

[...]

> Perhaps there could be some way to point more or less to the offensive
> "Non-hex digit used for Unicode escape"?  In this case, the offense was
> apparently committed by the \u.

No, the quote mark.

I've now changed this error message to be a bit more helpful:

Non-hex character used for Unicode escape: " (34)

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   bloggy blog: http://lars.ingebrigtsen.no