bug#40375: 27.0.50; yank unexpectedly depends on progn

[Noam Postavsky]

Markus Triska <triska@metalevel.at> writes:


>     $ emacs -Q yank.el --eval='(eval-buffer)'

A simpler reproducer is

    (erase-buffer)
    (message "hello")

will print nothing, whereas

    (progn (erase-buffer)
           (message "hello"))

prints "hello".  The problem is the first case erases the code which
calls message before it is read in.