bug#27325: Using '&rest' without a trailing parameter causes an error in emacs 26.0.50

[Philipp Stephani]

isaac lewis <isaac.b.lewis@gmail.com> schrieb am So., 11. Juni 2017 um 09:24 Uhr:

If my understanding is correct, the functions (lambda (&rest) t)
and (lambda () t) should behave similarly.

From where did you get this understanding? The Elisp manual says about &rest:

"To specify a list of zero or more extra arguments, include the

keyword &rest before one final argument."

and

"The keyword &rest (which must be followed by a single

argument name) indicates that any number of arguments can follow."

i.e. the parameter after &rest isn't optional.