cl-case is not autoloaded in Emacs 27

[Daniele Nicolodi]

Hello,

I have been trying to understand why some ERT unit tests I wrote fail in
Emacs 27 while they suceed in Emacs 26. After some head scratching I
found that the problem is caused by the fact that Emacs 27 does not seem
to know about the cl-case macro unless I (require 'cl-macs).

Indeed, if I try to byte-compile some trivial code like

(let ((x ?c))
  (cl-case x
    (?a 0)
    (?b 1)))

in Emacs 27.1 or Emacs 27.2 I obtain these warnings:

In toplevel form:
test.el:1:1:Warning: ‘97’ is a malformed function
test.el:1:1:Warning: ‘98’ is a malformed function

In end of data:
test.el:7:1:Warning: the function ‘cl-case’ is not known to be defined.

Adding a (require cl-macs) to my code solves my problem, however, the
doc string of cl-case would suggest that this should not be necessary.

Am I missing something?

Thank you.

Best,
Dan