Subject: bug#60015: 29.0.60; multi-line messages truncated in non-selected minibuffer

From: Juri Linkov <[email-masked]>
Date: Thu, 15 Dec 2022 09:44:42 +0200

Here is a better test case.  Please evaluate:

(progn
  (keymap-global-set "C-c C-c" (lambda () (interactive) (message "abc\ndef")))
  nil)

Then the bug can be reproduced with just these keys:

M-x
C-x o
C-c C-c

Only the top line is displayed in the minibuffer.