* doc/lispref/variables.texi (Local Variables): Warn that
'named-let' only works under lexical-binding. (Bug#64290)
A function call is in the tail position if it's the very last thing
done so that the value returned by the call is the value of @var{body}
itself, as is the case in the recursive call to @code{sum} above.
+
+@strong{Warning:} @code{named-let} works as expected only when
+lexical-binding is enabled. @xref{Lexical Binding}.
@end defspec
Here is a complete list of the other facilities that create local