Comment 3 for bug 1254511

Stas Boukarev <email address hidden> writes:

> Myabe instead of checking for NIL just say that it is not a CONS? And
> for the patch to get applied directly you need to:
> a) mention the ticket in the commit message
> b) add a description to the NEWS file, mentioning the ticket number.
> See other commits for examples.

For extra style points, you could use a simple-type-error to indicate
the expected type of the datum.